SECTION 07 53 23

ETHYLENE PROPYLENE DIENE MONOMER (EPDM) ROOFING

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PART 1    GENERAL
1.1	SECTION INCLUDES
A.	Fully Adhered EPDM Roofing Membrane with flashings and accessories necessary to comprise a complete roofing system. 
1.2	RELATED SECTIONS
A.	Section 03 30 00 - Cast-in-Place Concrete.
B.	Section 05 31 00 - Steel Decking.
C.	Section 06 10 00 - Rough Carpentry.
D.	Section 07 01 50.19 - Preparation for Re-Roofing.
E.	Section 07 21 00 - Thermal Insulation.
F.	Section 07 25 00 - Weather Barriers.
G.	Section 07 71 00 - Roof Specialties.
H.	Section 07 72 00 - Roof Accessories.
I.	Section 07 62 00 - Sheet Metal Flashing and Trim.
J.	Section 07 76 00 - Roof Pavers.
K.	Section 08 45 00 - Translucent Wall and Roof Assemblies.
L.	Section 08 62 00 - Unit Skylights.
M.	Section 22 10 06 - Plumbing Piping Specialties.
1.3	REFERENCES
A.	American Society of Civil Engineers (ASCE):
1.	ASCE 7 - Minimum Design Loads and Associated Criteria for Buildings and Other Structures; 2022.
B.	ASTM International (ASTM):
1.	ASTM C578 - Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation; 2023.
2.	ASTM D4637/D4637M - Standard Specification for EPDM Sheet Used in Single-Ply Roof Membrane; 2015, with Editorial Revision (2022).
C.	Federal Specification:
1.	HH-I-1972, Insulation Board, Thermal Faced, Polyurethane or Polyisocyanurate; Current Edition.
D.	FM Global (FM):
1.	FM (AG) - FM Approval Guide; Current Edition.
2.	FM 1-49, Loss Prevention Data Sheet, Perimeter Flashing, 2025.
3.	FM DS 1-28 - Wind Design; 2015, with Editorial Revision, 2024.
4.	FM DS 1-29 - Roof Deck Securement and Above-Deck Roof Components; 2016, with Editorial Revision (2022).
E.	National Roofing Contractors Association (NRCA):
1.	NRCA (RM) - The NRCA Roofing Manual; 2025.
F.	Underwriters Laboratories (UL):
1.	UL (DIR) - Online Certifications Directory; Current Edition.
1.4	SUBMITTALS
A.	Submit under the provisions of Section 01 30 00.
B.	Product Data:
1.	Manufacturer's data sheets on each product to be used including flashing materials, insulation, vapor retarder, surfacing and fasteners.
2.	Manufacturer's guide specifications.
3.	Preparation instructions and recommendations.
4.	Storage and handling requirements and recommendations.
5.	Typical installation methods and instructions.
C.	Manufacturer's written recommendations for insulation use and attachment.
D.	Verification Samples: Two representative samples of each material type to be used in the roofing system.
E.	Shop Drawings: Include details of materials, construction, and finish. Include relationship with adjacent construction. 
1.	Include outline of roof and appropriate details for flashings and terminations.
2.	Joint or termination details of the conditions.
3.	Interface with related materials.
4.	Setting plan for insulation.
5.	Mechanical fastener layout.
6.	Paver layout.
F.	Manufacturer's Certificate: Certify products meet or exceed specified requirements.
G.	Certification from insulation, roofing, and accessory component manufacturers that materials supplied comply with identified ASTM and industry standards.
H.	Verification that system specifications meet Code and insurance requirements, including but not limited to:
1.	Factory Mutual Research Laboratories.
2.	Underwriters Laboratories.
I.	Sustainable design documentation.
J.	Installers qualification statement.
K.	Testing firm's qualification statement.
L.	Warranty:
1.	Prior to installation, submit a warranty application to the manufacturer.
a.	Include roofing specifications and roofing drawings including dimensions and locations of penetrations with warranty application.
b.	Also included should be any requests for deviations to MuleHide's standard published specification and details.
2.	Specimen warranty and specific warranty conditions.
3.	Executed warranty.
1.5	QUALITY ASSURANCE
A.	Manufacturer Qualifications: Company specializing in manufacturing products specified in this section with a minimum of five years' documented experience.
B.	Installer Qualifications: Manufacturer approved and warranty eligible installer specializing in performing Work of this section on projects of similar scope and complexity.
C.	Source Limitations: Provide each type of product from a single manufacturing source or accessory products approved by roofing system manufacturer to ensure uniformity.
D.	When a project requires a Standard or Premium System Warranty (NDL), the MuleHide Roofing System must be installed in compliance with MuleHide published Specifications and Details by an independent MuleHide Warranty Eligible Contractor.
E.	There is to be no deviations from this specification or MuleHide's standard details without prior written approval from MuleHide's Technical Department.
F.	Upon completion of the installation according to the terms and conditions stated in this specification and in accordance to the information given in the Warranty Application and Pre-Job survey form and any additional approvals which might have been given by MuleHide, an authorized representative of Mule- Hide shall perform an on-site inspection of the roof (commercial projects only) to verify that all installation and material requirements have been met.
G.	MuleHide reserves the right to reject any roof system and refuse to issue any warranty on roofs which do not comply with MuleHide's specifications or current policies.
1.6	PRE-INSTALLATION CONFERENCE
A.	Convene a pre-installation conference approximately one week prior to the scheduled commencement of the Work. Attendees to include Architect, Contractor and trades involved. Agenda to include schedule, responsibilities, preparation and installation procedures and coordination necessary for related work.
1.7	DELIVERY, STORAGE, AND HANDLING
A.	Store and handle in strict compliance with manufacturer's written instructions and recommendations.
B.	Protect from damage due to weather, excessive temperature, and construction operations.
C.	Deliver materials in manufacturer's original unopened containers or wrappings, clearly labeled with manufacturer's name, product identification, and date of manufacture.
D.	Protect materials from damage during transit, storage, and delivery to site. Place materials on pallets and protect from moisture.
E.	Store materials in dry and clean area, clear of ground and moisture. Store rolls of membrane flat on pallets.
1.	Aeroweb Adhesive: Contents are flammable.
a.	Store cylinders with temperature maintained above 70 degrees F.
b.	Do not store where temperatures reach 110 degrees F or higher.
c.	Keep the cylinder valve open to maintain pressure in the hose and spray gun.
1)	Periodically spray in a safe manner to help prevent possible clogging.
2)	Keep spray gun trigger locked when not in use.
3)	Flush gun and hose with UN-TACK for long-term storage beyond 30 days.
F.	Store adhesive and caulking at temperatures between 60 and 80 degrees F. Materials exposed to lower temperatures affect the workability and performance of the product. Products must be restored to the above temperature prior to use.
G.	Store flammable materials in a cool, dry area away from open flames and sparks. Follow precautions outlined on containers or supplied by the material manufacturer/supplier.
H.	Materials determined as being damaged as confirmed by MuleHide, due to improper storage on the job site, are to be replaced with new materials.
1.8	JOB CONDITIONS
A.	This Specification is not to be considered applicable without the appropriate additional specifications approved by MuleHide if determined that any of the following conditions exist:
1.	The installation of any MuleHide Roof System is in a coastal area or high wind zone.
2.	If the MuleHide Roof System should exceed the structural load conditions as determined by an architect or engineer.
3.	When chemical or hazardous materials are discharged onto the MuleHide Roof System.
B.	MuleHide EPDM roofing materials may be installed in temperatures below 40 degrees F but only after consultation with the MuleHide Technical Department as special precautions or procedures may be necessary. The performance of the materials, installation costs and production rates may be affected.
C.	The General Contractor or the building owner is responsible for providing adequate surfaces and structures to receive the insulation, MuleHide Roof System, and related sheet metal necessary for the successful completion of the project.
D.	Only as much new roofing as can be made watertight shall be installed each day. This includes all flashing work.
E.	Substrates to receive new insulation, membrane or flashing must be thoroughly dry. Should surface moisture occur, the contractor is to provide adequate equipment to dry the substrate prior to application of new material.
F.	Prior to and during application, dirt, debris, and dust must be removed from surfaces to be roofed for both new and reroofing substrates.
G.	On projects where Fully Adhered EPDM Systems are specified, it is the responsibility of the independent roofing contractor to have the Owner or Owner's Representative verify the condition of the deck or substrate and to confirm the roof deck can withstand the additional load.
H.	Precautions must be taken to prevent wind blow-off or wind damage during the course of the roofing application. This may necessitate additional securement of temporary construction, materials, and equipment.
I.	The contractor is to verify and ensure roof drain lines are unblocked before starting work. Any blockages found must be reported to the owner's representative and MuleHide's Technical Department in writing.
J.	Temporary Water stops: Install at the end of each day's work, remove at the start of the next day's work, and disposed of properly. Water stops are to be compatible with all materials.
K.	Do not install the Roofing Membrane in direct contact with the following:
1.	Products containing coal tar pitch, creosote, or penta-based materials. 
2.	Contaminants such as petroleum, grease, acid, solvents, vegetable or mineral oil, animal oil, animal fat, etc.
3.	Contact the MuleHide Technical Department for recommendations if such conditions exist.
L.	The contractor must follow and comply with safety regulations as recommended by OSHA.
M.	Schedule and execute Work without exposing interior building areas to effects of inclement weather. Protect existing building and its contents against all risks.
N.	Work Sequencing: Avoid using newly constructed roofing for storage, walking surfaces, and equipment movement.
1.	Contractor is to provide the necessary protection and barriers to segregate work areas and prevent damage to adjacent areas.
2.	If excessive traffic over newly installed membrane is required, The Contractor must provide plywood or polyester felt protection to prevent damage.
3.	Damaged Materials: Must be replaced with new materials.
O.	Discovery of Unusual or Concealed Conditions During the Course of the Work: Report immediately in writing to the owner and MuleHide's Technical Department. 
1.	Halt Work until the Owner has responded with solutions to the problems.
2.	However, the Architect and Specifier may require a vapor retarder for the protection of the roofing assembly (i.e., primarily insulation, underlayment, and adhesives). Delete if not required.
3.	Use of a vapor retarder to protect insulation and reduce moisture accumulation within an insulated roofing assembly should be investigated. Consult the latest publications by:
4.	ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.).
5.	NRCA (National Roofing Contractors Association).
6.	Local building and energy codes for specific information.
7.	In the generally temperate climate of the United States, during the winter months, water vapor flows upward from a heated, more humid interior toward a colder, drier exterior. Vapor retarders are more commonly required in northern climates than in southern regions, where downward vapor pressure may be expected, and the roofing membrane itself becomes the vapor retarder.
8.	On cold storage/freezer facilities, the perimeter and penetration details must be selected to provide an air seal and prevent outside air from infiltrating and condensing within the roofing assembly.
P.	Vapor Retarders: Not required for the protection of the membrane.
1.	Basis of Design: MuleHide F5 Air and Vapor Barrier may be used. Refer to the Product Data Sheet for product installation.
Q.	Structural Concrete Decks when a Vapor Retarder is not used:
1.	Gaps in the deck along the perimeter and around penetrations must be sealed.
2.	Tilt-Up Panels: Vertical joints between panels must be sealed.
3.	Sealing these areas will help prevent infiltration of hot humid air and possible moisture contamination resulting from condensation.
a.	Specifically important when adhesive is used to attach the roof insulation.
R.	Follow local building codes, energy codes and requirements where applicable.
1.	Roofing Contractor: Determine and ensure the roofing system selected complies with local codes and requirements.
S.	Interior and Exterior Building Areas Affected by Construction: Must be cleaned up.
1.	Repair damaged areas to the owner's satisfaction.
T.	Project conditions may require modifications to this specification.
1.	Contact the MuleHide Technical Department if any of the following conditions exist:
a.	Roof Heights: Greater than 100 ft.
b.	Geographical Location: In a 100 mph or greater wind zone, per ANSI 100 year mean recurrence interval wind isotach.
c.	Location with Exposure D: As determined in ANSI A58.1.
U.	Consideration should be given in the project design to problems that can precipitate from the smooth surface characteristic of the MuleHide EPDM membrane.
V.	Consult Material Safety Data Sheets and container labels for specific safety instructions prior to use.
W.	Avoid breathing vapors of solvents, cleaners, primers, sealants, and adhesives. Use with adequate ventilation. Avoid prolonged contact of solvents, sealants, cleaners, primers, and adhesives with skin. Solvent resistant rubber gloves should always be worn during use.
X.	Do not use MuleHide EPDM roofing products near fire or flame. Do not use open flames for drying surfaces, sealants, or adhesives. Do not smoke near flammable products.
Y.	Do not use oil-based paint on EPDM membranes. Contact MuleHide's Technical Department for recommendations for compatible color coatings.
Z.	Do not allow muriatic acid (masonry cleaner) to come in direct contact with the MuleHide EPDM membranes, flashings, or accessories.
AA.	Do not allow MuleHide EPDM membranes or accessories to come into direct contact with steam or vents that produce temperatures in excess of 180 degrees F.
AB.	The MuleHide EPDM Roof System may be installed in cold weather provided the adhesives are stored at room temperature until just prior to use and used within 2 hours. Adhesives left in the cold must be returned to room temperature prior to use.
AC.	Cover Tapes, Flashing Tapes and In-Seam Tapes may lose tack when exposed to extended temperatures below 40 degrees F for extended periods of time. A heat gun may be used to warm the product. Only apply heat to the EPDM side or the release liner side of In-Seam Tapes. Be careful not to overheat. Hot boxes are the preferred method to warm all tape products.
AD.	In cold temperatures when the ambient temperature is near the dew point, condensation may form on the seam cleaner, tape primer and adhesive as the solvents flash off. If condensation occurs, discontinue the application and allow the surface to dry. Do not attempt to dry the surface with heat guns or torches. When weather permits apply a new coat of product.
1.9	WARRANTY
A.	Consult Manufacturer's Warranty Information here: https://www.mulehide.com/Search?q=Warranty to determine appropriate warranty for your project. Delete warranty systems not required. then delete warranty durations not required.
B.	Manufacturer's Residential Project Standard Limited Warranty unless indicated otherwise.
1.	Warranty Duration: ____ years.
2.	Warranty Duration: 20 years.
C.	Manufacturer's Roofing Membrane Limited Warranty for Commercial Projects:
1.	Coverage: Only the MuleHide EPDM membrane (or portion thereof) determined by MuleHide to be defective and resulting in roof leaks. 
a.	MuleHide does not perform inspections of the installation before issuing the Roofing Membrane Limited Warranty. 
b.	A MuleHide Warranty Application and the appropriate fee must be submitted to MuleHide to obtain this warranty. 
c.	Proof of purchase may be required.
2.	Not Covered: Workmanship or other components not supplied by MuleHide. 
3.	Warranty Duration: 10 years.
4.	Warranty Duration: ____ years.
5.	Warranty Duration: 30 years.
D.	Manufacturer's Standard System Warranty: A "No Dollar Limit", labor and material warranty.
1.	Coverage: MuleHide labeled membrane and accessories comprising the Roof System. Includes components supplied or approved in writing by MuleHide and exclusively installed by an independent MuleHide Warranty Eligible Contractor.
2.	Applicator must submit a Warranty Application and appropriate fee to MuleHide.
3.	Requires inspections by a MuleHide representative.
4.	Warranty Duration: 10 years.
5.	Warranty Duration: ____ years.
6.	Warranty Duration: 30 years.
E.	Manufacturer's Premium System Warranty: A "No Dollar Limit", labor and material warranty.
1.	Coverage: MuleHide labeled membrane, insulation, accessories, and components supplied or approved in writing by MuleHide and exclusively installed by an independent MuleHide Warranty Eligible Contractor.
2.	Applicator must submit a Warranty Application and appropriate fee to MuleHide.
3.	Requires inspections by a MuleHide representative.
4.	Warranty Duration: 10 years.
5.	Warranty Duration: ____ years.
6.	Warranty Duration: 30 years.
F.	MuleHide is under no obligation to issue warranties on projects completed prior to submittal of a properly completed Warranty Application to the MuleHide Technical Department.
G.	Metal flashing products supplied by MuleHide (MuleHide Metal Accessories) and installed by a MuleHide Warranty Eligible Applicator will be covered under a Standard or Premium System warranty. The finish on the MuleHide labeled metal components are covered for a maximum warranty period up to 25 years independent of the terms of the issued warranty (see the MuleHide 25 years Limited Metal Warranty for specific warranty coverage).
H.	Standard and Premium System warranties are not available for residential projects.
I.	EPDM tie-ins are not covered by MuleHide warranties.
J.	Contact MuleHide Technical Department for other extended warranties that may be available.
K.	MuleHide's obligations under the Roofing Membrane Limited Warranty, the Standard System Warranty, and the Premium System Warranty are limited to the specific terms and conditions of the respective.
PART 2    PRODUCTS
2.1	MANUFACTURERS
A.	Acceptable Manufacturer: Mule-Hide Products Co., Inc., which is located at:<BR />1195 Prince Hall Dr.<BR />Beloit, WI 53511<BR />Toll Free Tel: 800-786-1492<BR />Tel: 608-365-3111<BR />Fax: 608-365-7852<BR />Email: request info (mulehide@mulehide.com);Web: https://www.mulehide.com 
B.	Substitutions: Not permitted.
C.	Requests for substitutions will be considered in accordance with the provisions of Section 01 60 00.
1.	Components not supplied or manufactured by MuleHide may be submitted for review and acceptance by MuleHide's Technical Department. 
a.	Acceptance of other product is based solely on chemical compatibility and published performance data provided by the component manufacturer. 
b.	Components may be considered on a job-by-job basis and must be approved in writing by MuleHide's Technical Department. 
c.	MuleHide offers no warranty or guarantee for the performance or suitability of any component not supplied or manufactured by MuleHide.
2.2	PERFORMANCE AND DESIGN REQUIREMENTS
A.	MuleHide EPDM products and accessories are to be installed in strict compliance with current specifications and drawings as published by MuleHide Products Co., Inc. to install a Fully Adhered EPDM Membrane Roofing System
B.	The EPDM membrane is to be fully adhered to an acceptable substrate. 
1.	Adjoining Sheets: Overlapped a minimum of 3 inches and spliced with MuleHide In-Seam Tapes.
C.	Metal Work: Adhere to SMACNA industry standards for installation.
D.	Design Considerations:
1.	Specifier: Review local, state, and regional codes. Determine their impact on the specified Roofing System.
2.	Building Owner or Their Designate Representative: 
a.	Verify structural load limitation. 
1)	Existing Facility: If necessary, take a core cut to verify the weight of existing components.
3.	New Construction: Moisture generated due to the construction process could adversely impact various components within the roofing assembly if not addressed. 
a.	Refer to SPRI Advisory Bulletin included in the Design Reference DR-03-11 "Construction Generated Moisture".
4.	Drainage: Evaluate in accordance with all applicable codes. 
a.	Slopes: May be provided by tapering the structure or through use of tapered insulation.
b.	Verify the specified roof drains are sufficient and located to allow for positive drainage. 
1)	Significant ponding remaining after 48 hours should be eliminated with the addition of auxiliary drains in low areas where ponding is anticipated.
c.	The roofing Manufacturer disclaims responsibility for the design and selection of an adequate drainage system and drain accessories. 
d.	Drainage Systems and Drain Accessories: Are the responsibility of the building Owner or the Owner's Design Professional.
5.	Small Incidental Areas of Ponded Water:
a.	Will not impact the performance of this roofing system. 
b.	In accordance with industry standards, the roofing assembly must be designed to prevent ponding of water on the roof for periods longer than 48 hours. 
6.	Existing Conditions: 
a.	Removal of existing wet insulation and membrane must be specified. 
b.	The specifier must select an appropriate and compatible material as filler for voids created by removal of old insulation or membrane.
7.	Loose flashings at the perimeter, roof drains and roof penetrations are not acceptable.
E.	Solar Reflectance Index (SRI): _____.
1.	Based on three year aged value.
2.	Calculated in accordance with: ________.
F.	Roof-Ceiling Fire Resistance Rating: 
1.	Comply with UL (DIR), Assembly Design No. ________.
G.	Roof Covering External Fire Resistance Classification: Class _____.
1.	Tested in accordance with _____.
H.	Wind Uplift:
1.	Designed to withstand wind uplift forces calculated in accordance with ASCE 7.
2.	Design Wind Speed: In accordance with the Authorities Having Jurisdiction.
I.	Factory Mutual Classification: Class 1. Windstorm Resistance: ________.
1.	In accordance with _____.
J.	Insulation Thermal Resistance (R-Value): ____.
1.	Provide R-Value over the entire roof deck in accordance with local building codes.
2.	Provide R-Value over the entire roof deck in accordance with Authorities Having Jurisdiction.
2.3	EPDM ROOFING MEMBRANE
A.	Basis of Design: Standard Non-Reinforced EPDM Membrane as manufactured by MuleHide. Manufactured per RMA (Rubber Manufacturers Association) guidelines.
1.	Meets ASTM D4637, Type I.
2.	Formulated with fire retardants to inhibit spread of flame.
a.	Meet or exceed code body testing criteria for fire retardant roofing membranes.
3.	Available with in-seam tape pre-applied to sheets.
4.	Thick: 0.045 inches. Color: Black.
5.	Thick: 0.060 inches. Color: Black.
6.	Thick: 0.060 inches SAT. Color: Black.
7.	Thick: 0.090 inches. Color: Black.
B.	Basis of Design: Standard Polyester Reinforced EPDM Membrane as manufactured by MuleHide. Manufactured per RMA (Rubber Manufacturers Association) guidelines.
1.	Meets ASTM D4637, Type II.
2.	Formulated with fire retardants to inhibit spread of flame.
a.	Meet or exceed code body testing criteria for fire retardant roofing membranes.
3.	Available with in-seam tape pre-applied to sheets.
4.	Thick: 0.045 inches. Color: Black.
5.	Thick: 0.060 inches. Color: Black.
6.	Thick: 0.060 inches SAT. Color: Black.
7.	Thick: 0.075 inches. Color: Black.
C.	Basis of Design: White-on-Black EPDM Membrane as manufactured by MuleHide. Manufactured per RMA (Rubber Manufacturers Association) guidelines.
1.	Meets ASTM D4637, Type I.
2.	Available with in-seam tape pre-applied to sheets.
3.	Thick: 0.060 inches. Color: White-on-Black.
4.	Thick: 0.060 inches SAT. Color: White-on-Black.
2.4	ACCESSORY MATERIALS
A.	Use the following materials to install MuleHide Roof Systems. MuleHide will not warrant applications where another manufacturer's product is substituted without MuleHide approval. Products listed below are physically and chemically compatible with each other.
1.	Product: Helix Max Low-Rise Adhesive. A two-component, low-rise, construction grade, polyurethane foam adhesive. Designed to adhere approved roof insulations, thermal barriers, cover boards and fleece backed single-ply membranes to acceptable substrates. 
a.	VOC, CFC, HCFC and solvent free adhesive.
b.	Can be installed in continuous beads, full spray, or splatter applications. 
c.	Review Product Data Sheets to ensure proper use.
d.	Packaging Options: 5 gal jug, dual tanks, and dual cartridges.
2.	Product: Helix Low-Rise Adhesive. A two-component, low-rise, construction grade, polyurethane foam adhesive. Designed to adhere approved roof insulations, thermal barriers, or cover boards to acceptable substrates.
a.	Packaging Options: 15 and 50 gal drums, dual tanks, and dual cartridges.
3.	Product: Splice Adhesive. A black or white solvent based; synthetic rubber based (butyl) adhesive. Designed for splicing EPDM roof membranes and uncured EPDM Flashings. Maximum Warranty Term: 10 Years.
4.	Product: MuleHide Bonding Adhesive; solvent based. An amber colored synthetic rubber based neoprene adhesive. Designed to bond EPDM membranes to approved insulation boards, metal, concrete, wood, and other approved decking materials. 
a.	Application: 1/2 inch medium nap roller.
5.	Product: Low-VOC Bonding Adhesive. A high strength solvent-based contact adhesive. Allows bonding of EPDM membrane to porous and non-porous substrates. 
a.	Formulation: A blend of VOC exempt and non-exempt solvents. Meets the less than 250 g/l VOC content requirements of the OTC Model Rule for Single Ply Roofing Adhesives. 
b.	Application: 9 inch medium nap roller. 
6.	Product: MuleHide Low-VOC Bonding Adhesive 1168: A high strength solvent-based contact adhesive. Allows bonding of EPDM membranes to porous and non-porous substrates. 
a.	Formulation: A blend of VOC exempt and non-exempt solvents. Meets the less than 250 g/l VOC content requirements of the OTC Model Rule for Single Ply Roofing Adhesives.
7.	Product: Acrylic Water Base Bonding Adhesive: A non-flammable and non-toxic acrylic latex-based adhesive. Bonds EPDM membranes to approved insulation boards, wood, concrete, and other approved decking materials. 
a.	For horizontal surfaces only. Inclines: less than 2 inches. 
b.	Color Wet: White. Color Dry: Clear.
c.	Solids Content : Approx. 60 percent. Overall Texture: Similar to latex paint.
8.	Product: Aqua Base 120 Bonding Adhesive: A semi pressure-sensitive water-based bonding adhesive. Used with MuleHide EPDM membranes as a two-sided contact adhesive. High peel strength with low-VOCs and no strong odors.
9.	Product: AeroWeb Low-VOC Aerosol Contact Adhesive/Primer: Used to adhere membranes to various substrates, and prime surfaces prior to the application of F5 Air and Vapor Barrier. Quick dry time.
a.	Application: From self-contained pressurized cylinder.
10.	Product: In-Seam Tape: A black or white, butyl rubber-based adhesive in tape form. Provides high green strength in both shear and peel. 
a.	Application: Clear poly release film for ease of use.
11.	Product: Tape Primer: Solvent-based. For one-step cleaning and priming of EPDM surfaces to be bonded with In-Seam Tapes, Uncured Flashing Tapes, Cured Cover Tapes, and Pre- Taped membranes.
12.	Product: Low VOC Primer : Solvent-based. For one-step cleaning and priming of EPDM surfaces to be bonded with In-Seam Tapes, Uncured Flashing Tapes, Cured Cover Tapes, and Pre-Taped membranes. 
a.	Low VOC: Where environmental concerns are an issue.
13.	Product: Uncured EPDM Flashing Membrane: Self-curing membrane for flashings in a MuleHide EPDM roofing system. Adhered using Tape Primer and Splice Adhesive or In-Seam Tape.
a.	Thickness: 60-mils.
14.	Product: Uncured EPDM Flashing Tape: An uncured EPDM membrane laminated to cured butyl tape. Used to flash pipes, inside and outside corners, "T-joints" and other penetrations requiring a moldable product. 
a.	Used in conjunction with the MuleHide Tape Primer. 
b.	Not to be used for stripping seams, gravel stops, drip aprons or batten bars.
15.	Product: RMS Strips:
a.	Width: 6 inch. To secure the membrane at the base of parapets and curbs, eliminating the need for a field seam.
b.	Width: 9 inch. For membrane securement on mechanically attached systems.
16.	Product: Cured EPDM Cover Tape: Total Nominal Thickness: 90 mil.
a.	A 60-mil cured EPDM membrane strip laminated to 30-mil cured butyl rubber tape and rolled onto a release liner.
b.	Used with Tape Primer to strip gravel stops, drip aprons, seams, or batten bars.
c.	Can be used to make repairs to cut membranes.
17.	Product: Lap Sealant: A one part, black or white elastomeric caulk. For sealing exposed edges of field fabricated membrane laps.
18.	Product: Water Cut-Off: One-part, low viscosity, self-wetting, butyl-blend mastic. For sealing MuleHide membranes to wood, concrete, metal, plastic, and other substrates. Extremely tacky and remains so when used with a compression type seal.
19.	Product: MuleHide Black One-Part Pourable Sealer: A one-part, moisture curing, elastomeric polyether sealant. Rapid skin time when exposed to atmospheric moisture forming a waterproof rubber surface in less than an hour.
20.	Product: MuleHide Premolded EPDM Pipe Boot: Economical, pre-fabricated flashing for single pipe penetrations on single-ply EPDM roofing systems. A butyl tape ring laminated to the bottom side of the three inch base flange.
21.	Product: Premolded EPDM T-Joint Patches: Thickness: 70 mils. Uncured 40 mil EPDM flashing laminated to cured butyl rubber tape. Rolled onto a poly release liner. 
a.	Used to seal field splice joints or horizontal to vertical transitions of field seams on MuleHide EPDM roofing systems.
22.	Product: Pre-Cut Inside/Outside Corners: Size: 7 x 9 inch. Total Thickness: 90 mils. Uncured 60 mils thick EPDM flashing laminated to cured butyl rubber tape and rolled onto a poly release liner. 
a.	For installing inside and outside corners on MuleHide EPDM roofing systems.
23.	Product: MuleHide Pre-Taped Walkway Pads: 
a.	Protects membrane in areas exposed to repetitive foot traffic. 
b.	Walkways are to be installed at all traffic concentration points, such as roof hatches, access door, rooftop ladders, etc. regardless of traffic frequency. 
c.	Walkways are required if monthly or more frequent maintenance is necessary to service rooftop equipment.
24.	Product: MuleHide All-Purpose Bar (A-P Bar): Extruded aluminum bar, 50 mils thick. Used to terminate adhered reinforced membrane vertical flashings in certain constructions. Used to anchor the field sheet at the base of vertical angle changes.
25.	Product: MuleHide Weathered Membrane Cleaner: To clean aged EPDM membrane prior to seaming. Removes dirt and contaminants from EPDM membrane surfaces leaving a suitable surface for Tape Primer application.
26.	Product: Membrane Fasteners and Plates: A variety of membrane fasteners and plates to meet specific job conditions and substrates.
27.	Product: MuleHide Insulation: Poly ISO 1 and Poly ISO 2 polyisocyanurate insulation. A closed-cell polyisocyanurate foam core laminated to heavy, black non-asphaltic glass fiber reinforced felt facers. Shapes: Flat and tapered.
28.	Product: F5 Air and Vapor Barrier: Total Thickness: 40 mil thick. A composite of 35 mil self-adhering rubberized asphalt aminated to a 5 mil UV resistant poly film with an anti-skid surface. 
a.	Compatible with Helix Max Adhesive. 
b.	White Poly Film: For summer exposure.
c.	Black Poly Film: For winter exposure. 
d.	Can function as a temporary roof for 120 days. 
e.	Available in Rolls: Roll Width: 39 inch. Length: 75 ft long; 244 sq ft.
2.5	MATERIALS BY OTHERS
A.	Wood Nailers: No. 2 or better lumber. 
1.	Conform to Factory Mutual's Loss Prevention Data Sheet 1-49.
2.	Install as detailed on the project Drawings.
3.	To be of a height sufficient to match the thickness of the insulation being used.
4.	Not Acceptable: Creosote and asphaltic preservatives.
5.	Pressure Treated Lumber: Not required unless otherwise specified.
B.	Insulation: Installed as a protection layer over existing substrate to obtain desired thermal value.
1.	Compatible with Manufacturer's membranes, adhesives, flashings, and accessories.
a.	Approved by Manufacturer in writing.
2.	Acceptable insulation boards for use with a fully adhered roofing system when a standard warranty is requested:
a.	Insulation Type: Polyisocyanurate with Non-asphaltic Facers:
1)	Not Acceptable: Foil facers.
2)	Meet physical requirements of Federal Specifications HH-I-1972.
3)	Minimum Compressive Resistance: 20 psi.
4)	Thickness: 1 inch or greater as required by insulation manufacturer to span steel deck flutes.
b.	Insulation Type: High Density Wood Fiberboard: Minimum thicknesses and attachment rates will vary with wind requirements and deck types.
1)	Thickness: 1/2 inch minimum.
a)	When used as an overlay over other insulations.
b)	When used over wood and concrete decks.
2)	Thickness: 1 inch min when used over steel decks.
c.	Insulation Type: High Density 100 psi Polyisocyanurate Insulation Board: Poly ISO 1-H.
1)	Closed-cell polyisocyanurate foam core, laminated to premium performance coated glass fiber felt facers.
2)	Thickness: 1/2-inch.
3)	For use as a cover board.
d.	Insulation Type: Expanded Polystyrene (EPS):
1)	Board Density: 1.0 PCF certified minimum. 
2)	Physical Properties: Meet ASTM C578, Type II.
3)	Minimum Thickness: 1 inch.
4)	Minimum Thickness Over Steel Decks: As required by insulation manufacturer to span flutes.
5)	Required Overlay:
a)	High Density Wood Fiberboard: 1/2 inch thick minimum
b)	Polyisocyanurate Insulation: 1 inch thick minimum.
c)	DensDeck: 1/4 inch thick minimum.
d)	Securock: 1/4 inch thick minimum.
6)	Local building codes may require a layer of gypsum board under the EPS insulation on steel decks.
e.	Insulation Type: Extruded Polystyrene:
1)	Physical Properties: Meet ASTM C578, Types IV, VI, or VII.
2)	Minimum Thickness: 1-inch.
3)	Minimum Thickness Over Steel Decks: As required by insulation manufacturer to span flutes.
4)	Required Overlay:
a)	High Density Wood Fiberboard: 1/2 inch thick minimum
b)	Polyisocyanurate Insulation: 1 inch thick minimum.
c)	DensDeck: 1/4 inch thick minimum.
d)	Securock: 1/4 inch thick minimum.
5)	Local building codes may require a layer of gypsum board under the EPS insulation on steel decks.
f.	Insulation Type: Perlite:
1)	Not permitted as top layer insulation.
2)	Permitted Use: As fill insulation under an approved insulation.
3)	EPDM membrane cannot be adhered directly to perlite insulation.
g.	Insulation Type: Overlay Roof Board: Over approved insulation or as thermal barrier over combustible deck.
1)	Thickness: 1/4-inch minimum.
2)	Acceptable Product: DensDeck; www.buildgp.com
3)	Acceptable Product: Securock; www.usg.com .
3.	Review state and local building codes regarding the installation of expanded or extruded polystyrene insulation directly over a steel deck.
4.	Insulation Manufacturer: 
a.	Provide recommendations for use and attachment to the Owner with a copy sent to MuleHide's Warranty Department. 
b.	Provide a copy of their specific warranty conditions.
5.	MuleHide Premium Warranties: Require the use of the MuleHide labeled insulation or insulation by an approved MuleHide manufacturer. 
a.	Use of other insulations may disqualify the project for consideration of the issuance of a Premium Warranty. 
b.	Contact the MuleHide Technical Department for specific requirements.
C.	UL and FM Approved Assemblies:
1.	Contact the Manufacturer's Technical Department for proper insulated assemblies when projects require compliance with UL or FM requirements.
2.	Components may change with the slope, deck type and classification requested.
D.	Sheet Metal:
1.	Metal flashing products supplied by MuleHide (MuleHide Metal Accessories) and installed by a MuleHide Warranty Eligible Contractor will be covered under a Standard or Premium System Warranty.
2.	Metal components such as gravel stops, drip aprons, counter-flashings, copings, etc., should be fabricated and installed in accordance with ES-1 recommendations and requirements.
3.	Sheet metal components supplied by others are not covered by the MuleHide warranties. Contact MuleHide's Technical Department for specific requirements.
PART 3    EXECUTION
3.1	GENERAL 
A.	When Using Acrylic Water Base Bonding Adhesive or Aqua Base 120 Bonding Adhesive: The adhesive must be installed in temperatures of 40 degrees F and rising for 48 consecutive hours t when installing a Fully Adhered MuleHide EPDM Membrane Roofing System. In cooler weather, liquids such as solvents, sealants, etc. must be stored at warmer temperatures (60 to 80 degrees F) until just prior to use in order to facilitate the installation.
1.	Prevent Acrylic Water Base Bonding Adhesive or Aqua Base 120 from freezing before it fully cures.
B.	Application of Helix Max Low-Rise Adhesive shall not proceed during periods of inclement weather. Follow MuleHide requirements for application temperatures and humidity levels.
C.	Do not apply Helix Max Adhesive when surface and/or ambient temperatures are below 25 degrees F.
3.2	SUBSTRATE CONDITIONS
A.	General Conditions: The following applies to the substrates that will receive a Fully Adhered MuleHide EPDM Membrane Roofing System for both new construction and reroof applications.
1.	Roof Deck: To be structurally sound to provide for mechanical fasteners securement. 
a.	Areas showing a loss of integrity due to corrosion, rotting, warping, concrete spalling, etc., must be repaired or replaced prior to installing the roofing system.
2.	Roofing Contractor: Is responsible for performing test cuts at each roof area prior to reroofing. 
a.	Substrate Condition: Must be suitable to receive a Fully Adhered MuleHide EPDM Roofing System. 
b.	Wet Insulation: Must be removed and replaced. See Single-Ply Roofing Institute's guidelines for determining wet insulation.
3.	Contact the Roofing material manufacturer when the substrate is exposed to excessively high humidity and/or a corrosive environment. Special fasteners (e.g., stainless steel) or details may be required.
4.	A determination must be made regarding the presence or absence of coal tar pitch within the existing roof assembly when considering a recover of the old roof system. 
a.	If Coal Tar Pitch is Present: Requires the use of a 6-mil poly slipsheet under the new insulation unless the coal tar pitch is 10 years or older and is separated from the MuleHide EPDM membrane by a layer of insulation a minimum of 1-1/2 inch thick having a minimum "R" value of 5.0. 
b.	Joints must be butted tightly together or have joints completely taped to prevent volatiles from damaging roof membrane.
5.	It is acceptable to install a Fully Adhered MuleHide EPDM Membrane Roofing System over the following deck substrates provided that an acceptable insulation is installed over the substrate as required:
a.	Structural Metal Deck: 22 gauge minimum. Must conform to recommendations outlined in Factory Mutual's Loss Prevention Data Sheet 1-28; requires insulation. 
1)	Contact MuleHide's Warranty Department for attachment requirements for decks less than 22-gauge in thickness. 
2)	All FM testing is based on attachment to a 22-gauge steel deck.
b.	Structural Concrete and Pre-Cast, Pre-Stressed Concrete: 2,500 psi minimum. 
1)	Cured and dry to industry standards.
2)	Surface: Smooth and free of moisture or frost. 
3)	Sharp ridges and other projections above the surface must be removed before roofing. 
4)	An approved insulation board is recommended. 
5)	Minimum Deck Thickness: 2 inches with 3 inches preferred due to possible spalling damage that may occur to the underside of the deck when using fasteners for insulation and membrane attachment. 
6)	Insulation Attachment: With Type III or IV hot asphalt, approved adhesive, or approved fasteners. 
7)	Membrane: May be adhered directly to structural concrete decks that have been trowel finished and are completely cured; 28 day minimum. 
8)	Gaps: In the deck along the perimeter and around penetrations.
a)	Must be sealed along with vertical joints between tilt-up panels, if present, to prevent infiltration of hot humid air and possible moisture contamination resulting from condensation.
c.	Lightweight Insulating Concrete Fill and Metal Form Work: 24-ga. minimum.
1)	Roof Deck: Must be cured and dry to the deck manufacturer's and/or industry standards and smooth, free of ridges and depressions. 
2)	Venting: As recommended by the roof deck manufacturer is to be accomplished. 
3)	Decks are acceptable to receive a Fully Adhered MuleHide EPDM Membrane Roofing System after pullout tests have been completed and appropriate fasteners have been selected. 
4)	Attachment: Must be through the insulating concrete into the steel or concrete deck. Insulation board is required. 
5)	Vapor Barriers: May be required when installing insulation over new decks.
d.	Wood Plank: 1 inch minimum. Conform to Factory Mutual's requirements for Class 1 impregnated decks; insulation is required. 
1)	FM approved wood decks are 2 inch thick minimum, tongue, and groove planks.
e.	Plywood: 15/32 inch minimum. Exterior grade; minimum CDX grade. 
1)	Reroof Applications: A layer of approved insulation is required. 
2)	New Construction: 
a)	Recommended: Insulation board. 
b)	Adhering directly to plywood or oriented strand board ("OSB") deck is acceptable if the decking is secured with screws or back-out resistant fasteners. 
c)	Decks attached with common, or cement coated nails or staples must be covered with an approved insulation. 
3)	Check with local building code requirements. Adhering an EPDM membrane direct to a wood deck may not meet local fire codes.
f.	Cementitious Wood Fiber Decks: May be acceptable to receive a Fully Adhered MuleHide EPDM Membrane Roofing System after pullout tests have been completed and appropriate fasteners have been selected. 
1)	This deck type requires an acceptable insulation.
g.	Gypsum Deck: Cured and dry to manufacturers' and/or industry standards. 
1)	Deck Surface: Must be smooth and free from ridges and depressions. 
2)	May be acceptable to receive a Fully Adhered MuleHide EPDM Membrane Roofing System after pullout tests have been completed and appropriate attachment methods have been selected. 
3)	This deck type typically requires an acceptable insulation.
h.	Oriented Strand Board (OSB): 7/16 inch thick. 
1)	Contact MuleHide for acceptable sheet sizes, fastener types and spacing when using OSB as requirements change with thickness used. 
2)	Minimum thickness or usage restrictions may change depending on local code requirements. 
3)	Pullout tests must be performed and submitted to MuleHide Technical Department prior to bidding the project.
i.	Reroofing Projects Having Plywood Decks: A minimum of one layer of an approved insulation is required after the tear-off has been completed.
j.	Positive Slope: Roof surfaces must have a positive slope to provide adequate drainage. 
1)	Not Acceptable: Ponding water 48 hours after rainfall.
3.3	PREPARATION OF EXISTING SUBSTRATE
A.	To Prevent Delays or Interruptions: Coordinate work with other trades or suppliers. Ensure components incorporated into the Roofing System are available as the work progresses. 
1.	Examine substrates to which the roofing materials are to be applied. Ensure their condition is satisfactory for the Roofing System application.
a.	Not Permitted: Voids greater than 1/4 inch wide. 
b.	Concrete Substrates: Cured and free of laitance and curing compounds. 
c.	Substrates for Roofing Materials: To be dry and free of oil, dirt, grease, sharp edges, and debris. 
d.	Inspect substrates and correct defects before application of roofing membrane.
B.	Determine the condition of the existing roof deck and roofing system. 
1.	Areas with deteriorated decking, wet insulation or other failed materials shall have those affected materials removed and replaced. 
2.	Make sure the decking is securely fastened. 
3.	Roofing Contractor: Has the final responsibility to ensure an acceptable deck is provided to receive the new roof system.
C.	Large Blisters: Cut and patch to provide a reasonably level surface.
D.	On Recover Projects: Tear off existing base flashings, cant strips and projection flashings down to the substrate. 
1.	Flashing Substrate: To be dry and free of oil, dirt, grease, sharp edges, and debris.
E.	Gravel Over Existing Nailers: Must be totally removed prior to installing new nailers and flashings. Verify existing nailers are in good condition and securely anchored to roof decks.
F.	When an Additional Thickness of Insulation is Being Added: New nailers must be added over existing nailers to match the height of the new insulation. Nailers must be securely anchored to the roof deck per the "Wood Nailers" Article in PART 3 of this specification.
G.	Aeroweb Adhesive Suybstrate Preparation:
1.	Acceptable Vertical Substrates Include: MuleHide Poly ISO roof insulation, Poly ISO 1-HD, DensDeck Prime, SECUROCK, OSB, Plywood, Metal, Residual asphalt, and clean concrete block. 
a.	Vertical Surfaces with Residual Asphalt: To improve adhesion and reduce potential for asphalt bleed-through.
1)	Apply initial "sealing" base coat of AeroWeb. Allow to flash off properly.
2)	Apply a secondary coating of AeroWeb to the vertical surface.
2.	Acceptable Horizontal Substrates Include: MuleHide Poly ISO roof insulation, Poly ISO 1-HD, DensDeck Prime, SECUROCK, OSB, and plywood. 
a.	Not Acceptable: High Density Wood Fiberboard.
3.	Surfaces receiving AeroWeb Adhesive: Mist be clean, smooth, dry, free of films, sharp edges, loose and foreign materials, oil, and grease. 
a.	Depressions 1/4 inch or Larger: To be feathered, using epoxy, mortar, or other approved patching material. 
b.	Sharp Projections: Remove by sweeping, blowing or vacuum cleaning.
4.	Air Intake Ventilation Equipment: Must be shut off and ductwork openings and gaps in the deck / substrate should be temporarily sealed during product application.
H.	Roof Surfaces: Free of ponded water, ice, or snow. 
1.	Eliminate significant ponding that remains after 48 hours. 
a.	Install tapered insulation to create positive drainage of the roof surface.
b.	Install new drains in areas where ponding remains. 
2.	Positive drainage eliminates excessive live loads caused by ponding water that could cause structural damage or failure.
I.	When Removing an Existing Roof During Reroofing: Remove only an amount of roofing and flashing that can be made watertight with new EPDM materials in a one-day period or prior to the onset of inclement weather.
J.	Recovering Over a Gravel Surfaced BUR System: 
1.	Requires installation of acceptable insulation. 
2.	Remove loose gravel prior to mechanically attaching a new layer of insulation. 
3.	All lead pipe and drain flashings shall be removed.
4.	An Alternative to Mechanical Attachment: Helix Max Low- Rise Adhesive may be used to adhere approved insulations to properly prepared gravel surfaced BUR. 
a.	Contact MuleHide Technical Department for specific information regarding the use of Helix Max Low-Rise Adhesive.
K.	Recovering Over a Smooth Surfaced BUR and Smooth Modified Bitumen Roofing Systems: Requires the installation of an acceptable insulation. All lead pipe and drain flashings shall be removed.
L.	Single-Ply Membranes: EPDM, Hypalon, PVC 
1.	The field sheet must be cut into sections no larger than 10 x 10 ft and an acceptable layer of insulation is to be mechanically attached over the existing field membrane. 
2.	Alternative to Mechanical Attachment: Helix Max Low-Rise Adhesive, used to adhere approved insulations to properly prepared smooth surfaced existing roof surfaces. 
a.	Contact MuleHide Technical Department for specific information regarding the use of the Helix Max Low-Rise Adhesive over specific roof types.
M.	Polyurethane Foam Roofing Systems ("PUF"): Are not acceptable for recover applications. 
1.	The PUF system must be completely removed and new insulation installed prior to the installation of a new EPDM Roofing System.
N.	If a MuleHide Premium System Warranty is Requested:
1.	The existing roof system must be removed to the deck prior to a new roofing system installation.
2.	Alternatively to Above: A moisture survey by an independent third party must be taken, wet areas removed, and a copy of the survey submitted to MuleHide with the warranty application.
3.	In no event shall the MuleHide Premium System Warranty cover the existing roof system or problems created by the existing roof system.
3.4	VAPOR RETARDERS
A.	Vapor Retarders: Specific climatic and job conditions may require the use of a vapor retarder. 
1.	It is the sole responsibility of the design professional to determine the need for a vapor retarder (which may be required by local building or energy codes) and its type and location in the roofing system. 
a.	A vapor retarder may often act as an "air barrier" which may have a positive effect in reducing internal air pressure. 
2.	The National Roofing Contractors Association: Recommends the installation of vapor retarders when interior relative humidity is 45 percent or greater and the outside mean average January temperature is below 40 degrees F.
3.	Install a vapor retarder over a suitable substrate with sides, end laps, and all penetrations sealed in accordance with the manufacturer's instructions. 
a.	Vapor retarder may be loosely laid or adhered with the manufacturer's recommended adhesive.
4.	Reroofing Where the Existing Built-Up Roof Remains: Built-up roof may be an adequate vapor retarder as long as splits or tears are repaired to provide a total barrier to vapor penetration.
5.	Projects utilizing MuleHide's F5 Air and Vapor Barrier must follow MuleHide's installation instructions and details for the F5 Air and Vapor Barrier.
3.5	WOOD NAILERS
A.	Wood Nailers: Required at roof perimeter edges where metal edging and gutter systems are specified or where indicated in the Manufacturer's published Standard EPDM Details.
1.	Must be firmly anchored to the decks at a maximum 2 ft on center and resist a pullout force of 200 lbs/linear foot in any direction. 
a.	A 1/2 inch Vent Space: To be provided between adjacent lengths of nailers. 
b.	Fasteners must be installed within 6 inches of each end. 
c.	Spacing and Fastener Embedment: Must conform to Factory Mutual Loss Prevention Data Sheet 1-49.
2.	Height of Nailers: To match the surface level of the insulation and roof membrane. 
3.	Width of Nailers: To extend beyond the metal flange to prevent damage to the membrane.
4.	Woodwork to be reused must resist a minimum force of 200 lbs/linear foot in any direction and be free of rot.
5.	Not Acceptable: Wood Nailers with creosote and asphaltic preservatives. 
6.	Pressure Treated Lumber: Not required on new construction unless otherwise specified.
3.6	INSULATION INSTALLATION
A.	Accepted Roof Insulations: 
1.	Installed in accordance with the manufacturer's specifications.
2.	Secured to the roof deck in accordance with the manufacturer's requirements.
3.	Neatly cut to fit around penetrations and projections with a maximum allowable gap of 1/4-inch.
4.	Open Joints: To be repaired with like insulation material.
5.	eather or taper insulation to provide a minimum sump area of 36 x 36 inches where possible at all drains. 
a.	Crickets and Saddles: 
1)	May be installed beneath the specified insulation where possible. 
2)	If made from non-compatible insulation material, must be overlaid with an acceptable insulation or underlayment.
6.	Install no more roof insulation in one day than can be covered with the EPDM membrane or when the onset of inclement weather is anticipated.
7.	Insulation Installed Over Steel Decks: Checked so that no edges are left unsupported along the flutes. Insulations to be of sufficient thickness and density to prevent breakage under normal roof construction traffic.
8.	End joints of each row of insulation are to be offset against the previous row. 
a.	When more than one layer of insulation is to be used, succeeding layers are to be laid staggered in relation to the previous layer of insulation and joints must be offset.
9.	When a MuleHide Premium System Warranty is Requested: Only MuleHide labeled insulation may be used unless written approval is obtained, prior to job bid, for an alternative insulation.
10.	Insulation Other Than MuleHide Labeled Insulation:
a.	Must be an FM approved insulation and approved by MuleHide for use under the MuleHide Fully Adhered EPDM Roofing System. 
b.	Refer to the insulation manufacturers guidelines for the appropriate type, size and thickness of the insulation needed for use over the respective substrate and under the MuleHide EPDM Roofing System. 
c.	Contact MuleHide Technical Department prior to bidding the project to determine approved insulations and assemblies.
B.	Mechanical Attachment:
1.	Insulation fastening density will vary based on insulation type, thickness, and required warranty.
2.	For code compliance, increased fastening density may be required depending upon project wind speed and wind uplift requirement.
3.	MuleHide's minimum attachment rates:
a.	Approved Polyisocyanurate: Min 2 inch thick (top layer):
1)	Fasteners per 4 x 8 ft Boards:
a)	Field: 8. Perimeter: 12. Corner: 16.
b.	Approved Polyisocyanurate: 1.5 to 2 inch thick:
1)	Fasteners per 4 x 8 ft Boards:
a)	Field: 12. Perimeter: 18. Corner: 24.
c.	Approved Polyisocyanurate: 1.0 to 1.5 inch thick:
1)	Fasteners per 4 x 8 ft Boards:
a)	Field: 16. Perimeter: 24. Corner: 32.
d.	HD Poly-ISO Installed over Approved Insulation: 1/2 inch thick.
1)	Fasteners per 4 x 8 ft Boards:
a)	Field: 16. Perimeter: 24. Corner: 32.
e.	HD Fiberboard Installed over Approved Insulation: Min 1/2 inch thick.
1)	Fasteners per 4 x 8 ft Boards:
a)	Field: 16. Perimeter: 24. Corner: 32.
f.	Dens Deck Prime or Securock Installed over Approved Insulation: Min 1/4 inch thick.
1)	Fasteners per 4 x 8 ft Boards:
a)	Field: 12. Perimeter: 18. Corner: 24.
g.	OSB Installed over Approved Insulation: Min 7/16 inch thick.
1)	Fasteners per 4 x 8 ft Boards:
a)	Field: 17. Perimeter: 25. Corner: 32.
h.	Approved OSB/Polyisocyanurate Composite: Min 2 inch thick.
1)	Fasteners per 4 x 8 ft Boards:
a)	Field: 17. Perimeter: 25. Corner: 32.
4.	Perimeter Enhancements: To meet increased uplift requirements in the perimeters and corners of each roof area, additional insulation attachment provisions must be installed as follows:
a.	The minimum width of perimeter and corner areas is not to be less than 8 ft.
b.	See Details MHT-UN-108A and MHT-UN-108B.
c.	Perimeters: Insulation attachment to be increased 50 percent over the field attachment requirements with a maximum of 1 fastener every 1 sq ft.
d.	Corners: Insulation attachment to be increased 100 percent over the field attachment requirements with a maximum of 1 fastener every 1 sq ft.
e.	Factory Mutual Projects: The width of the roof perimeter and corner areas is defined as the smaller of 0.1 times the building lesser plan dimension or 0.4 times the eave height; mean roof height for slopes greater than 2 inches per 12 inches slope, except for heights greater than 60 feet. 
1)	The minimum width of the perimeter and corner areas are not to be less than 3 ft. 
2)	Contact MuleHide Technical Department for Factory Mutual projects exceeding 60 ft heights.
C.	Adhesive Attachment:
1.	Substrate Preparation:
a.	The surface to which adhesive is to be applied is to be dry, clean, and free of fins, protrusions, sharp edges, loose and foreign materials, oil, and grease. 
1)	Depressions greater than 1/4 inch are to be filled with Helix Max Adhesive or other approved patching material. 
2)	Sharp projections must be removed. Previously unexposed (shiny) asphalt must be primed with AeroWeb.
b.	Seal gaps between the wall/penetration and concrete deck with MuleHide F5 Air and Vapor Barrier, FROTH-PAK, or other suitable material, to avoid condensation issues and positive pressure from air infiltration.
c.	Apply Helix Max Adhesive when the substrate and ambient temperatures are 25 degrees F or above when spraying or extruding with heated or non-heated equipment. 
1)	Dispense adhesive between 300-800 psi depending on equipment used. 
2)	Consult MuleHide Technical Department for more details.
2.	Adhesive Installation:
a.	Apply Helix Max Adhesive to the substrate.
1)	Fully Adhered Applications: Spray adhesive to obtain full coverage; approx. 1/8 to 1/4 inch thick after foaming.
2)	Bead Applications: Apply adhesive at 4, 6, or 12 inch on center with a minimum 1/2 inch wide wet bead. 
a)	For steel decks, the bead attachment of Helix Max Adhesive must run parallel with and be on top of the steel deck flutes.
3)	Bead Spacing Requirements:
a)	Building Height: 0 to 25 ft.
1)	Perimeter Width: 4 ft.
a)	Bead Spacing, Field: 12 inch on center.
b)	Bead Spacing, Perimeter: 6 inch on center.
c)	Bead Spacing, Corner: 6 inches on center.
b)	Building Height: 26 to 49 ft.
1)	Perimeter Width: 8 ft.
a)	Bead Spacing, Field: 12 inch on center.
b)	Bead Spacing, Perimeter: 6 inch on center.
c)	Bead Spacing, Corner: 6 inches on center.
c)	Building Height: 50 to 74 ft.
1)	Perimeter Width: 12 ft.
a)	Bead Spacing, Field: 12 inch on center.
b)	Bead Spacing, Perimeter: 6 inch on center.
c)	Bead Spacing, Corner: 6 inches on center.
d)	Building Height: 75 to 100 ft.
1)	Perimeter Width: 16 ft.
a)	Bead Spacing, Field: 12 inch on center.
b)	Bead Spacing, Perimeter: 6 inch on center.
c)	Bead Spacing, Corner: 6 inches on center.
e)	Building Height: 101 ft or greater.
1)	Perimeter Width: Contact MuleHide Tech Dept.
a)	Bead Spacing, Field: Contact MuleHide Tech Dept.
b)	Bead Spacing, Perimeter: Contact MuleHide Tech Dept.
c)	Bead Spacing, Corner: Contact MuleHide Tech Dept.
3.	Factory Mutual bead spacing guidelines in the perimeter and corner may differ from the above data. Beads at 12 inch on center are not acceptable at perimeters and corners.
4.	Allow adhesive to rise and develop "string/body" (approx. 1.5 to 2 min.). String time will vary based on environmental conditions like temperature and humidity. Do not allow the adhesive to over-cure (lose tack) prior to setting insulation boards.
5.	Place insulation boards (maximum 4 x 4 ft), or cover boards (DensDeck Prime or Securock may be 4 x 8 ft) into adhesive after allowing it to rise and develop "string/body".
6.	Designate one person to walk boards into place and then roll the boards between 5 to 7 minutes from the initial adhesive application. Boards may be temporarily weighted or relief-cut where necessary to keep the boards in constant contact with the adhesive until the adhesive cures.
7.	At the beginning of the insulation attachment process and periodically throughout the day, check the adhesion of boards to ensure a tight bond is created and maximum contact is achieved.
8.	Gaps between horizontal and vertical surfaces of roof area and gaps around penetrations must be sealed to prevent warm interior air from infiltrating and condensing within the roofing assembly. Condensing moisture could weaken bottom insulation facer and eventually result in dislodgement or loose boards when adhesive is used.
9.	Projects utilizing MuleHide's F5 Air and Vapor Barrier must comply with MuleHide's installation requirements and published details.
3.7	MEMBRANE INSTALLATION
A.	MuleHide strongly recommends the .060 inch thick EPDM membrane 10' wide and 100' long be used with the MuleHide Fully Adhered Roofing System. Sheets wider than 10' will have factory folds that may not relax and lay flat during cold weather that may cause problems while seaming the sheets together. The .045 inch thick EPDM may exhibit wrinkles due to swelling caused by the solvent in the adhesive.
B.	Unroll the MuleHide EPDM Membrane and position without stretching. Large sheets may be moved into the final position by encapsulating air under the membrane and floating it into place. Allow the membrane to relax at least 30 minutes prior to installation. Inspect and remove any damaged membrane. Lap sheets a minimum of 4" for 3" Inseam Tape or 7" for 6" Inseam Tape to allow for a proper field splice. Membrane overlaps shall be shingled with the flow of water. Membrane should run perpendicular to the direction of steel deck flutes and orientation of wood decks where possible.
C.	Perimeter - When installing the MuleHide Fully Adhered EPDM Roofing membrane system, it is not necessary to install half sheets parallel with the perimeter. Full size sheets should be used everywhere practical to minimize the number of field seams. In place of half sheets, additional fasteners are installed in the insulation in the perimeter areas as defined in 3.06.B Perimeter Enhancements. Perimeter areas shall be determined by one of the following methods:
1.	MuleHide defines the minimum perimeter area as 8' in from the roof edge along all exterior roof edges.
2.	For Factory Mutual insured buildings, follow guidelines in FM's Loss Prevention Data Sheet 1-29. Contact MuleHide Warranty Department for fastener spacing for compliance with FM 1-60 and 1- 90 requirements.
3.8	FIELD SHEET ATTACHMENT
A.	Adhesives for EPDM Adhered Systems
1.	Bonding Adhesive: Wet: No. Contact: Yes.
2.	Low-VOC Bonding Adhesive: Wet: No. Contact: Yes.
3.	Low-VOC Bonding Adhesive 1168: Wet: No. Contact: Yes.
4.	Acrylic Water Based: Wet: Yes. Contact: No.
5.	Aqua Base 120: Wet: No. Contact: Yes.
6.	AeroWeb Low-VOC Aerosol Contact Adhesive: Wet: No. Contact: Yes.
B.	Unroll the MuleHide EPDM Membrane and position without stretching. 
1.	Large sheets may be moved into the final position by encapsulating air under the membrane and floating it into place. Allow the membrane to relax at least 30 minutes prior to installation. Inspect and remove any damaged membrane. Lap sheets a minimum of 4 inches for 3 inch Inseam Tape or 7 inches for 6 inch Inseam Tape to allow for a proper field splice. 
a.	Keep protective packaging of MuleHide Heat-Weld Membrane intact until ready to use.
C.	Bonding Adhesive, Low VOC Bonding Adhesive, and Low VOC Bonding Adhesive - 1168 (solvent base), Aqua Base 120:
1.	After carefully positioning several sheets of the EPDM membrane, one half of the first sheet's length is to be pulled back to expose the bottom side of the sheet. The fold in the sheet should run parallel with the length of the sheet. Smooth out the sheet to remove any wrinkles.
2.	Mix adhesive scraping the sides and bottom of the can (minimum of 5 minutes is required) until the adhesive is uniform in color. Consult Product Data Sheet for adhesive instructions.
a.	Low VOC Bonding Adhesive and Low VOC Bonding Adhesive 1168 require mechanical stirring (electric drill), both initially and periodically during application.
3.	Using a plastic core, medium nap roller, apply a smooth even coat of Bonding Adhesive to back side of membrane and substrate (no globs or puddles). A nine inch roller will easily fit into a 5-gallon adhesive container. 
a.	Do not apply adhesive in area of seam laps.
4.	Coverage rates for Bonding Adhesive, Low VOC Bonding Adhesive, and 1168 are approximately: 
a.	120 sq ft per gal for one surface; membrane or substrate only.
b.	60 sq ft per gal per finished surface; membrane and substrate.
5.	Coverage rate for Aqua Base 120: Approximate.
a.	100-120 sq ft per gal per finished surface; membrane and substrate.
6.	Allow the adhesive to dry to a ' tacky' state. Test adhesive by placing a knuckle into it and turning your wrist a one-quarter turn. Adhesive is ready to mate when it is tacky but does not string when knuckle is lifted. Aqua base 120 will take a longer time to dry.
7.	Care must be taken to ensure proper drying. Avoid thin areas of adhesive which can result in over drying and improper adhesion.
8.	Wrinkles transmitting through the seams must be cut out and patched using a cured sheet.
9.	Seams: To be spliced following the procedures in the "Splicing of Lap Areas: Article in PART 3 of this specification.
10.	The roof membrane is to extend up the vertical surface a minimum of 1 inch and turn down over the edge of the roof a minimum of 2 inches or as required by the MuleHide details.
D.	AeroWeb Adhesive:
1.	Connect spray gun to hose and connect hose to cylinder. Use lithium grease or petroleum jelly on all fittings and be careful to avoid cross- threading.
a.	Open the valve on the cylinder to check fittings for leaks. 
b.	Keep the cylinder valve open to maintain pressure in hose/spray gun when not in use.
2.	Can be applied at ambient temperature of 25 degrees F and above. 
a.	Propellant in cylinders must be kept above 70 degrees F for the product to spray properly. 
b.	Utilize power-heated blanket, and hot boxes when necessary. 
c.	Substrate to be clean, dry, and free of debris and contaminants.
3.	Application: To be continuous and uniform, avoiding globs or puddles. 
a.	Avoid high thickness buildup.
b.	When the ambient temperature is below 70 degrees F.
1)	Store cylinders in heated space. Move to project area during application. 
2)	Cylinders must be kept warm on the jobsite. 
3)	Dispense product from cylinder while it is still warm. 
4)	When product in cylinder becomes too cold, it will begin to spit rather than spray. If this occurs, swap cold cylinder for warmer one and return cold cylinder to heated area. 
5)	When changing cylinders, close the valve on the cylinder and depressurize the hose. 
6)	Remove the hose and attach to the new cylinder. 
7)	Open valve and do a test spray.
c.	Apply AeroWeb in an even coat to substrate, keeping the spray tip approximately 12 inches away and perpendicular to the surface during spray. 
4.	Application Coverage Rates: Approximate.
a.	1-Sided Primer: 2,000 to 2,500 sq ft when used with MuleHide F5 Air and Vapor Barrier or as a primer for Helix.
b.	2-Sided Adhesive for Walls: 1,000 sq ft.
c.	2-Sided Adhesive for Field: 1,000 sq ft.
5.	Vertical Application: 
a.	Approved Membranes: Standard EPDM and White-on-Black EPDM.
b.	Height Restrictions: None, if appropriate membrane terminations are utilized.)
c.	Spray the wall and back of the membrane. Utilize a 50 percent overlapping spray pattern.
d.	Do not apply adhesive to splice areas.
e.	Allow adhesive to become tacky but not overly dry.
1)	It should not transfer to fingers when touched.
f.	Mate membrane with the wall from the center of the sheet towards the edges, smoothing by hand.
g.	Broom membrane with a soft-bristle broom.
h.	Roll in with a hand roller.
6.	Horizontal Application:
a.	Approved Membranes: Standard EPDM, and White-on-Black EPDM.
b.	Application: To be continuous and uniform, avoiding globs or puddles.
c.	Spray substrate and back of the membrane with enough overlap to ensure 100 percent coverage; 2 to 3 inch of overlap.
d.	Do not apply adhesive to splice areas.
e.	Allow adhesive to become tacky but not overly dry.
1)	It should not transfer to fingers when touched.
f.	Roll the membrane onto the adhesive-coated substrate while avoiding wrinkles. 
g.	Brush down the bonded portion of the sheet with a soft-bristle push broom.
h.	Roll the membrane with a clean, dry roller to achieve maximum contact.
E.	MuleHide Acrylic Water Base Bonding Adhesive:
1.	Only used for adhering EPDM membrane to horizontal surfaces. May not be used on slopes exceeding 2 inches per foot. Not acceptable for vertical applications.
2.	May be used as a single-side adhesive when applying over porous surfaces such as high density wood fiberboard, plywood, oriented strand board, wood plank, Dens-Deck, or moisture-resistant gypsum board.
3.	The single-side application is when the adhesive is only applied to the substrate and the membrane is immediately rolled in place into the white, wet adhesive. MuleHide does not recommend applying the adhesive to the membrane in a single-side application as the quantity may not be sufficient to properly bond to the substrate.
a.	The recommended minimum application rate is 7 to 10 wet mils in thickness.
4.	Unroll the MuleHide EPDM Membrane and position without stretching. Large sheets may be moved into the final position by encapsulating air under the membrane and floating it into place. Allow the membrane to relax at least 30 minutes prior to installation. Inspect and remove any damaged membrane. Lap sheets a minimum of 4 inches to allow for a proper field splice. Membrane overlaps are to be shingled with the flow of water. Membrane should run perpendicular to the direction of steel deck flutes and orientation of wood decks where possible.
5.	After carefully positioning several sheets of the EPDM membrane, one half of the first sheet's length shall be pulled back to expose the bottom side of the sheet. Smooth out the sheet to remove any wrinkles.
6.	A smooth, even coating of MuleHide Acrylic Water Base Bonding Adhesive shall be applied to the substrate that will be covered by the first sheet. As the adhesive is being applied to the substrate, the membrane should immediately be rolled into the adhesive while the adhesive is still wet. The coverage rate is approximately 125 to 160 sq ft per gal. The coverage rate will vary with the degree of porosity of the surface being covered.
7.	It is recommended that the adhesive be applied to the substrate using a 9" paint roller with a minimum 1/2 inch nap solvent-resistant paint roller as it will easily fit into the 5 gallon pails. If the adhesive is sprayed, the adhesive must be rolled with a paint roller immediately after spraying. If the adhesive begins to turn clear, it is too dry and shall require a second coat.
8.	Once the sheet has been rolled out, it must be broomed with a large nylon bristled push broom to promote 100 percent adhesion. Fold back the unadhered half of the sheet and repeat the procedure.
9.	MuleHide recommends periodically checking the adhesive application rate. Immediately after a sheet has been broomed, gently pull the sheet back 1 to 2 feet and examine the surface of the membrane. A uniform coat of adhesive should be visible on the surface of the membrane. This indicates that a sufficient amount of adhesive was applied, and the sheet has been rolled into the adhesive at the right time.
10.	Failure to observe sufficient adhesive on the membrane indicates either a less than sufficient amount of adhesive applied or waiting too long to roll in the membrane. The contractor shall adjust the application accordingly. The porosity of the substrate or climatic conditions may require a heavier coat of adhesive.
11.	Install subsequent sheets in the same manner, overlapping the previous sheet with a minimum of 3 inches for the splice area. All sheets must be lapped in shingle fashion.
3.9	SPLICING OF LAP AREAS
A.	Splicing seams with MuleHide In-Seam Tape:
1.	Make sure that the top sheet is lapped over the bottom sheet in a shingle fashion so that the water will flow over the seam edge and not against it.
2.	All surfaces to be spliced shall be clean and dry. Overlap the adjacent membrane a minimum of 4 inches. Mark the bottom sheet with a crayon approximately 1/4 inches at the edge of the top sheet along the entire splice length as a guide to install the In-Seam Tape. Do not use a chalk line or any type of marker that will prevent the seam tape from sticking.
3.	Fold back the top sheet approximately 12 inches to allow for cleaning. Remove excess mica by wiping the seam area with clean damp rags. Dispose of all rags as they become dirty.
4.	Prepare each surface of the seam by scrubbing the cleaned areas with MuleHide Tape Primer using clean Scotch-Brite pads. Additional cleaning may be required along the factory seams that intersect the seam area to remove excess accumulations of mica. Scotch-Brite pads must be replaced with clean ones as they become dirty. The primed membrane should have a uniform black color when dry. There should be no streaks present. The MuleHide Tape Primer shall be thoroughly stirred prior to use. Do not stir Low-VOC Primer.
5.	Note: The use of excessive amounts of MuleHide Tape Primer will not significantly enhance the adhesion of the Pre-Taped or Taped Product to the EPDM membrane. Use only the amount necessary to obtain 100% coverage of the area where the tape or adhesive will be applied.
6.	Allow the MuleHide Tape Primer to dry until it does not transfer to a dry finger touch. Prompt installation of the In-Seam Tape or Taped Product as soon as the primer flashes off minimizes potential dust contamination and promotes adhesion in colder weather.
7.	Unroll approximately 3 ft of In-Seam Tape. Align the tape with a marked line and press the tape down to the bottom sheet using firm, even hand pressure. Continue for the length of the splice. Tape roll ends should be overlapped 1 inch.
8.	Allow the top sheet to rest on poly backing after application. A minimum of 1/8 inch to a maximum of 1/2 inch of tape must extend beyond the splice edge. A continuous piece of In-Seam Tape must be used at all field and factory splice intersections.
9.	Peel the poly backing off the tape at a 45 degree angle and parallel with the roof allowing the top sheet to fall freely onto the exposed tape. Press the seam together using hand pressure and wiping toward the splice edge. Immediately roll the seam with a 2 inch wide steel roller, using positive pressure, toward the edge of the seam.
10.	Wait a minimum of 2 hours prior to application of the Lap Sealant. The Lap Sealant is only required at intersections with factory seams, where two pieces of tape overlap within the seam and on patches installed over "T-joints". A bead of Lap Sealant should be applied along the overlap for 6 inches in each direction from the center point of the overlap.
B.	Splicing seams with MuleHide Splice Adhesive (Maximum 10-Year warranty)
1.	MuleHide limits all Standard and Premium system warranties on projects using Splice Adhesive to a maximum of 10-years, regardless of membrane thickness or seam width. Refer to the MuleHide Bonding Adhesive Product Data Sheet for specific installation instructions.
C.	Regardless of the method used to splice the seams, all seams must be thoroughly inspected for fishmouths, bubbles, blisters and wrinkles and repaired, as necessary.
1.	If fishmouths or wrinkles occur through the seam, they must be cut out and patched with cured membrane (cured cover tape may be used).
2.	Patch with cured EPDM membrane or Cured Cover Tape (do not use uncured flashing or flashing tape) that is at least 3 inches larger in all directions than the area that has been cut out. Round the corners of the patch.
3.	Center the patch over the area to be repaired. Follow the splicing procedures for the appropriate material used.
3.10	ADDITIONAL MEMBRANE SECUREMENT (BASE ATTACHMENT)
A.	Securement must be horizontally to the roof deck or vertically to the base of the various penetrations as shown in the MuleHide Standard Details. Provide Additional EPDM Membrane Mechanical Attachment at the Following Locations: 
1.	Perimeter of each roof level.
2.	Base of walls.
3.	Curbs.
4.	Skylights.
5.	Expansion joints.
6.	Tie-ins.
7.	Interior walls.
8.	Bottom of valleys.
9.	Angle changes exceeding 2:12 (2 inch rise per ft) inclines.
10.	Penetrations as shown in the MuleHide Standard Details.
B.	Membrane Mechanical Attachment Methods:
1.	Seam Plate: 2.4 inches wide, and appropriate fasteners through the membrane; reinforced EPDM membrane only.
a.	The seam plate and edge to be 1/2 inch away from the angle change.
b.	Seam Plates Placement: Horizontally or vertically depending on conditions.
c.	Refer to MuleHide EPDM Standard Details for proper placement.
2.	MuleHide All Purpose Bar:
a.	Extruded aluminum bar with pre-punched holes 6 inches on center. 
b.	Bar Placement: Horizontally or vertically depending on the detail followed. 
c.	Refer to MuleHide Standard Details for proper bar placement.
d.	Maximum Fastener Spacing: Not to exceed 12 inches on center. 
e.	Adjoining Bars: Spaced approximately 1/2 to 1 inch apart. 
f.	Bars to be attached at the ends a maximum of 1 inch from the end of each bar. 
1)	This may require pre-drilling additional holes. 
2)	Cut bars must be deburred.
3)	Under no circumstances is the Bar to be stripped with 6 inch uncured flashing or uncured flashing tape. 
4)	MuleHide allows only the use of Cured Cover Tape or cured field sheet to strip over the All Purpose Bar.
g.	A bar must be installed 3 to 6 inches from inside and outside corners.
3.	MuleHide RMS (Reinforced Membrane Strip) Attachment Strip: 6 inch wide EPDM membrane reinforcement strip that may be installed at the base of walls and curbs. 
a.	The RMS is installed prior to the placement of the field sheet.
b.	Follow standard procedures for cleaning and splicing the RMS and field sheet. Use Mule- Hide Tape Primer to prepare the membrane surface when using the pre-taped RMS.
1)	MuleHide 2.4 inch Seam Plates: Used to attach the RMS either horizontally or vertically with appropriate fasteners. 
2)	Refer to MuleHide EPDM Standard Details for placement of the RMS, plates, and fasteners. 
3)	Fastener Spacing: Not to exceed 12 inches on center. 
4)	Adjoining RMS Strip: To be spaced a maximum of 1 inch apart. 
a)	It is not required to overlap the RMS.
c.	Vertical Attachment: RMS must extend 3 inches or more onto the horizontal surface; roof substrate. 
1)	Seam Plate Installation: 6 to 9 inches from inside and outside corners.
2)	Refer to EPDM Standard Details for proper placement. 
d.	Horizontal Attachment: Membrane to be placed 1/2 inch or more from the base of the angle change extending out onto the horizontal surface; roof substrate. 
1)	Seam Plates: To be placed 1/2 to 1 inch from the exterior strip edge. 
a)	Installation: 6 to 9 inches from inside and outside corners.
2)	Refer to EPDM Standard Details for proper placement. 
4.	Drip Apron and Gravel Stop:
a.	Primed with Tape Primer and stripped with Cured Cover Tape. Cleaning the metal with a Weathered Membrane Cleaner to remove oil film may be required prior to installing and priming with MuleHide Tape Primer.
b.	The edge of the Cured Cover Tape overlapping the metal flange shall be caulked with Lap Sealant. For those areas where water flows over the drip apron, both sides of the Cured Cover Tape must be caulked.
c.	Metal Flange: To extend 3 inches or more onto the wood nailer. 
d.	Wood Nailer: Must be wider than the metal flange. 
e.	Approved Screw Fasteners: To be installed no more than 6 inches on center and 1/2 to 3/4 inch from the metal flange inside edge. 
1)	Ring Shank Nails: May also be used. No more than 4 inches on center.
f.	Caulk the cured cover tape edge overlapping the metal flange with Lap Sealant. 
1)	Where water flows over the drip apron, caulk both sides of the Cured Cover Tape.
3.11	FLASHING INSTALLATION
A.	EPDM Membrane Flashing:
1.	To be installed concurrently with the roof membrane as the project progresses. 
2.	Not Allowed: Temporary flashings unless approved in writing from the MuleHide Technical Department. 
3.	Should water penetrate the new roofing because of incomplete flashings, the affected areas must be removed and replaced at the Contractor's expense.
4.	All surfaces to be fully adhered should be compatible, dry, and smooth with no excessive surface roughness.
5.	Recover Projects: Tear off existing base flashings, cant strips and projection flashings down to the substrate. 
a.	If deteriorated areas of substrate are uncovered, repairs must be made to provide a suitable substrate for the new EPDM flashings.
6.	Walls, Parapets, Curbs and Penetrations: To be flashed with cured EPDM membrane where possible. 
7.	Uncured EPDM Flashing or Uncured Flashing Tape: 
a.	To be limited to areas such as corners, pipes, scuppers, patches over "T-joints", patches at the base of vertical field seams; at the angle change, and other shaped penetrations requiring the flashing to be molded and cured product is not practical.
B.	Adhesive Options for Wall Flashings:
1.	Bonding Adhesive: 
a.	Single Sided (Wet Lay): No. Double Sided (Contact): Yes.
2.	Low-VOC Bonding Adhesive: 
a.	Single Sided (Wet Lay): No. Double Sided (Contact): Yes.
3.	Low-VOC Bonding Adhesive 1168: Solvent base.
a.	Single Sided (Wet Lay): No. Double Sided (Contact): No.
4.	Acrylic Water Based Bonding Adhesive:
a.	Single Sided (Wet Lay): No. Double Sided (Contact): Yes.
5.	AeroWeb Low-VOC Aerosol Contact Adhesive:
a.	Single Sided (Wet Lay): No. Double Sided (Contact): Yes.
6.	MuleHide's Water Base Adhesive: Not permitted for use on vertical surfaces.
C.	Bonding Adhesive, Low-VOC Bonding Adhesive, and Low VOC Bonding Adhesive 1168; solvent base.
1.	Mix adhesive. Continuously scrape the sides and bottom of the can for 5 minutes minimum or until the adhesive color is uniform. See the product data sheet for adhesive instructions.
a.	Low VOC Bonding Adhesive and Low VOC Bonding Adhesive 1168: 
1)	Stir with electric drill, initially and periodically during application.
b.	Porous Surfaces and Substrates: 
1)	May require application of a prime coat and second coat of Low VOC Bonding Adhesive and Low VOC Bonding Adhesive 1168 to accomplish proper adhesion.
2.	Application: Use a plastic core, medium nap roller. Apply a smooth even coat of Bonding Adhesive to back side of membrane and substrate, no globs, or puddles. 
a.	Nine inch rollers fit easily into 5 gal adhesive containers. 
b.	Do not apply adhesive in area of seam laps.
3.	Coverage Rate: Approximate
a.	120 sq ft per gal for one surface; membrane or substrate only.
b.	60 sq ft per gal per finished surface; membrane and substrate.
4.	Allow the adhesive to dry to a ' tacky' state. 
a.	Test adhesive by placing a knuckle into it and turning your wrist a one-quarter turn. Adhesive is ready to mate when it is tacky but does not string when knuckle is lifted.
5.	Care must be taken to ensure proper drying. Avoid thin layers of adhesive which can result in over drying and improper adhesion.
6.	Roll coated membrane onto substrate. Do not wrinkle the membrane or trap air bubbles. 
a.	After mating the membrane to the substrate, roll the membrane with a 2 inch wide rubber hand roller for maximum positive contact between the membrane and the substrate.
7.	Areas of Flashings and Membrane to be Spliced: Do not apply Bonding Adhesive.
8.	Extended Drying Times: To be expected during cool, overcast, humid, shaded, or late day applications.
a.	Adhesive must be dry but still tacky before mating surfaces to avoid permanent blisters due to trapped solvents.
9.	Overlap Adjacent Flashing Sheets: 
a.	For 3 inch In-Seam Tape: A minimum of 4 inches.
b.	For 6 inch In-Seam Tape: A minimum of 7 inches.
c.	When RMS is not used, EPDM Membrane Flashings must extend 6 inches or more onto the field sheet and be adhered securely. 
1)	There must be a minimum of 3 or 7 inches between the front of the fastener plates and the edge of the sheet, depending on the width of the In-Seam Tape being used.
10.	Flashings: To be extended 8 inches or more above roof membrane level and be terminated unless previously accepted by the owner or his representative and the MuleHide Technical Department. 
a.	Refer to MuleHide EPDM Standard Details for more information.
b.	After Flashing is Adhered in Place: Promote full contact adhesion by going back over the entire area with a 2 inch rubber hand roller.
11.	Flashings must be properly terminated according to MuleHide's published Standard Details.
D.	AeroWeb Adhesive Application Instructions: Refer to the "Field Sheet Attachment" Article in this Specification.
E.	Aqua Base 120 Bonding Adhesive:
1.	Mix adhesive. Continuously scrape the sides and bottom of the can for 5 minutes minimum or until the adhesive color is uniform. See the product data sheet for adhesive instructions.
2.	Application: Nap roller, 9 inch wide, 1/4 or 3/8 inch. 
a.	Apply a smooth even coat of Aqua Base 120 adhesive to back side of membrane and substrate: no globs or puddles. 
b.	Nine inch rollers fit easily into 5 gal adhesive containers. 
c.	Do not apply adhesive in area of seam laps.
3.	Coverage Rate: Approximate
a.	240 sq ft per gal for one surface; membrane or substrate only.
b.	120 sq ft per gal per finished surface; membrane and substrate.
4.	Allow adhesive to dry until it turns translucent and does not transfer to a dry finger or pull away from the substrate. Aqua Base 120 adhesive will take a longer time to dry. Adhesive must remain tacky.
5.	Mate surfaces avoiding wrinkles. 
a.	Roll the membrane with a 2 inch wide rubber hand roller for maximum positive contact between the membrane and the substrate.
b.	Overlap adjacent flashing sheets a minimum of 2 inches.
6.	Do not apply adhesive in area to be spliced.
7.	Extended Drying Times: To be expected during cool, overcast, humid, shaded, or late day applications.
a.	Adhesive must be dry but still tacky before mating surfaces to avoid permanent blisters due to trapped moisture.
8.	Overlap Adjacent Flashing Sheets: 
a.	For 3 inch In-Seam Tape: A minimum of 4 inches.
b.	For 6 inch In-Seam Tape: A minimum of 7 inches.
c.	When RMS is not used, EPDM Membrane Flashings must extend 6 inches or more onto the field sheet and be adhered securely. 
1)	There must be a minimum of 3 or 7 inches between the front of the fastener plates and the edge of the sheet, depending on the width of the In-Seam Tape being used.
9.	Flashings: To be extended 8 inches or more above roof membrane level and be terminated unless previously accepted by the owner or his representative and the MuleHide Technical Department. 
a.	Refer to MuleHide EPDM Standard Details for more information.
b.	After Flashing is Adhered in Place: Promote full contact adhesion by going back over the entire area with a 2 inch rubber hand roller.
10.	Flashings must be properly terminated according to MuleHide's published Standard Details.
3.12	PIPES, DRAINS, EXPANSION JOINTS, PITCH PANS
A.	Pipe Flashings:
1.	Flash single pipe penetrations with pre-molded pipe boots where possible.
2.	Where boot cannot be used, apply uncured flashing or uncured flashing tape. 
3.	Do not cut and patch pre-molded pipe boots to wrap around a pipe.
4.	For recover applications, remove existing flashings including lead flashings.
5.	Hot Pipes Exceeding 180 Degrees F: Install an insulated cold collar sleeve to adhere flashings.
6.	Cold collars: Install rain hoods to prevent leakage.
B.	Roof Drains:
1.	Remove existing roofing materials and metal flashings.
2.	Prepare surface around each drain to prevent distortion, tenting, or bridging of membrane. Provide smooth transition from the roof surface to the surface of the drain bowl/clamping ring.
3.	Do not run field seams through drains or sumps. If sheet layout causes seam to fall in line with drain, install target patch, minimum 36-inch x 36-inch.
4.	Apply one full tube of water cut-off mastic to each drain. Apply to drain bowl, under membrane, where clamping ring will be seated to provide a continuous seal between membrane and drain bowl.
C.	Flashing Expansion Joints:
1.	Reference manufacturers published instructions for application methods.
3.13	WALKWAY INSTALLATION
A.	Provide in areas where routine rooftop maintenance and regular rooftop traffic is expected.
B.	Pre-Taped Walkway Pad Installation:
1.	Install walkways over clean, dry surfaces.
2.	Layout areas where walkway pads to be installed with material oriented to be placed between field seams with each adjacent and abutting section gapped a minimum of 6-inches. Do not install walkway pads over seams or flashings.
3.	Tape Primer:
a.	Apply tape primer with a clean non-woven, open-web flexible handheld abrasive pad.
b.	Scrub area of membrane where Walkway Pad will be installed.
c.	Scrub to achieve a thin, even coating on the membrane.
d.	Primed and cleaned area to be uniform in color without streaks and free of globs or puddles.
4.	Allow primer to flash off until it does not transfer to a dry finger touch. Install walkway pads as soon as primer flashes off to minimize potential dust contamination and promote adhesion in colder weather.
C.	Precast Pavers:
1.	Install manufacturer approved precast paver systems over one layer of 6-ounce HP protection mat or other manufacturer approved slip sheet material.
2.	EPDM sheet membrane may be used as a protection layer under precast pavers.
3.	Set precast pavers without covering field seams.
3.14	TEMPORARY NIGHT SEALS
A.	Install temporary cutoffs around incomplete edges of roofing assembly at end of each workday and when work is postponed due to inclement weather.
B.	Position temporary tie-ins so sealed membrane edge will not buck or pond water. Do not restrict drainage.
C.	Remove gravel, dirt, debris, or other contaminants from tie-in area and ensure surfaces are clean and dry.
D.	Seal loose membrane edges downslope with products compatible with substrate and membrane type.
E.	Provide continuous pressure along sealed edge to prevent water migration under finished roof sections.
F.	When work resumes, remove temporary seals. contaminated membrane, sealants, and insulation fillers from work area and properly dispose.
3.15	FIELD QUALITY CONTROL
A.	Field Inspection: Coordinate field inspection in accordance with manufacturer's written requirements and Division 01, General Requirements.
B.	Manufacturer's Services: Coordinate manufacturer's services in accordance withDivision 01, General Requirements.
C.	At completion of installation and if a system warranty is specified, require manufacturer's authorized representative to perform on-site inspection of roof to verify material and installation requirements are met.
3.16	CLEANING AND PROTECTION
A.	Clean products in accordance with the manufacturers' written recommendations. 
B.	Touch-up, repair or replace damaged products before Substantial Completion.

END OF SECTION