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	SECTION 07534
	MECHANICALLY ATTACHED EPDM ROOFING SYSTEMS
	** NOTE TO SPECIFIER ** Mule-Hide Products Co., Inc.; EPDM Roofing Systems products. .
	This section is based on the products of Mule-Hide Products Co., Inc., which is located at: 1195 Prince Hall Dr. Beloit, WI 53511-5481 Tel: 608-365-3111 Toll Free: 800-786-1492 Fax: 608-365-7852 Email: mulehide@mulehide.com Web: www. mulehide.com [ Click Here ] for additional information. The original Mule-Hide trade name was registered in 1906. Mule-Hide manufactured top quality roofing products that quickly gained a reputation for long lasting performance. Mule-Hide Products began marketing single-ply systems in 1985. Our proven systems, combined with good installation practices, provide the assurance of performance to the highest industry standards. Mule-Hide contractors and applicators are now serviced by over 270 stocking distributors nationwide. This specification includes Mechanically attached EPDM Roof Systems and accessories designed to maximize labor savings and roof lifecycle. Mule-Hide provides total roofing systems and will work with you to ensure compatibility and related performance of interfacing products. This includes assistance in membrane and system selection; and determining the best installation practices and techniques to ensure a sustainable, watertight roof. Contact Mule-Hide for additional information.
	PART 1	GENERAL
	1.1	SECTION INCLUDES
	** NOTE TO SPECIFIER ** Delete items below not required for project.
		A.	Mechanically Attached EPDM Roofing System.
		B.	Roof Insulation.
	1.2	RELATED SECTIONS
	** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
		A.	Section 05300 - Metal Deck: Installation and requirements.
		B.	Section 06100 - Rough Carpentry: Roof blocking and nailers.
		C.	Section 07220 - Roof Insulation: Installation and Requirements.
		D.	Section 07260 - Vapor Retarders: Installation and requirements.
		E.	Section 07620 - Sheet Metal Flashing and Trim: Metal flashing and counter flashing installation and requirements.
		F.	Section 07710 - Manufactured Roof Specialties: Copings, counterflashing systems, gutters, downspouts, and roof expansion assemblies.
		G.	Section 07724 - Roof Hatches: Frame and integral curb counterflashing.
		H.	Section 07720 - Roof Accessories: Manufactured curbs and roof hatches.
		I.	Section 08600 - Skylights: Skylight frame and integral curb counterflashing.
		J.	Section 08950 - Translucent Wall and Roof Assemblies: Frame and integral curb counterflashing.
	1.3	REFERENCES
	** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
		A.	ANSI/SPRI-1A-1, Standard Field Test Procedure for Determining the Mechanical Uplift Resistance of Insulation Adhesives over Various Substrates.
		B.	ASTM C 1289 - Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board.
		C.	ASTM D 297 - Standard Test Methods for Rubber Products - Chemical Analysis.
		D.	ASTM D 412 - Standard Test Methods for Vulcanized Rubber and Thermoplastic Rubbers and Thermoplastic Elastomers -Tension.
		E.	ASTM D 4637 - Standard Specification for EPDM Sheet Used in Single-Ply Roof Membrane.
		F.	ASTM E 108 - Test Methods for Fire Tests of Roof Coverings.
		G.	FM 4470 - Approval Standard for Class 1 Roof Coverings.
		H.	FM Data Sheet 1-28S - Wind Uplift Pressure on Roofs.
		I.	FM Data Sheet 1-29 - Wind Loads to Roof Systems and Roof Deck Securement.
		J.	FM Data Sheet 1-49, Perimeter Flashing.
		K.	UL 790 - Tests for Fire Resistance of Roof Covering Materials.
	1.4	SYSTEM DESCRIPTION
	** NOTE TO SPECIFIER ** Delete references, such as insulation, if specified in a separate specification section. Note that Mule-Hide provides all primary roofing materials compatible when installed in compliance with requirements published by Mule-Hide Products Co., Inc and unless approved in writing by Mule-Hide, products by others are excluded from the Mule-Hide warranty.
		A.	Mechanically Attached EPDM Roofing System: Single ply, mechanically attached, EPDM roofing membrane system with flashings, insulation and accessories.
	1.5	DESIGN / PERFORMANCE REQUIREMENTS
	** NOTE TO SPECIFIER ** Use the following paragraphs carefully; edit specification to identify system performance requirements or functional criteria. Delete references from the list below that are not actually required.
	Mule-Hide Mechanically Attached Systems are intended for use within the following limitations. Contact Mule-Hide if any of these conditions are anticipated to be exceeded.
	- Roof heights above 60 feet.
	- Geographical locations in wind zone 3, per Factory Mutual's current edition of Loss Prevention Data Sheet 1-28. - Geographical locations in a 100 mph or greater wind zone, per the ANSI 100 year mean recurrence interval wind isotach.
	- Locations with a D exposure as determined by ANSI A58.1. - Locations where the dead load of the roofing system exceed the structural capacity of the structure, - Locations where chemical or hazardous materials are discharged onto the roof surfaces.
		A.	Conform to applicable code for roof assembly fire hazard requirements.
	** NOTE TO SPECIFIER ** include the following paragraph only when roof insulation is not provided by the roof membrane manufacturer. Delete if not required.
		B.	Wind Load: Measure wind uplift calculations in accordance with applicable building code requirements. Comply with ANSI/SPRI-1A-1 Standard Field Test Procedure for Determining the Mechanical Uplift Resistance of Insulation Adhesives over Various Substrates to determine adequate load resistance.
	** NOTE TO SPECIFIER ** Edit the following paragraph as appropriate to the applicable building code, and Insurance Underwriter requirements. Select one of the following UL requirements as required and delete those not applicable.
		C.	Exterior Fire Rating: ASTM E 108 or UL 790.
			1.	Class A.
			2.	Class B.
			3.	Class C.
	** NOTE TO SPECIFIER ** Edit the following paragraph as appropriate to the applicable building code, and Insurance Underwriter requirements. Mechanically attached roofing systems are currently eligible for FM 1-60 and 1-75 ratings using prescriptive perimeter and corner requirements of FM 1-29. Contact FM for additional information. Contact Mule-Hide if any of these ratings are anticipated to be exceeded.
		D.	FM 4470: Roof Assembly Classification, of Class ______ Construction, wind uplift requirement of ____, in accordance with FM Construction Bulletin 1-29.
	1.6	SUBMITTALS
		A.	Submit under provisions of Section 01300.
		B.	Product Data: Manufacturer's data sheets on each product to be used, including:
			1.	Preparation instructions.
			2.	Storage and handling requirements and recommendations.
			3.	Installation specifications.
			4.	Specimen copy of manufacturer's warranty.
		C.	Shop Drawings: Indicate setting plan for insulation, slope and drain locations, joint and termination detail conditions, flashings, conditions of interface with other materials, fastener or adhesive pattern, walkways and membrane layout and seam locations.
		D.	Verification Samples: For each product specified, two samples, minimum size 6 inches (150 mm) square, representing actual products.
		E.	Manufacturer's Certificates:
			1.	Certify roofing and accessory component products meet or exceed specified requirements.
			2.	Verification that system specifications meet all identified code and insurance requirements.
	** NOTE TO SPECIFIER ** include the following paragraph only when roof insulation is not provided by the roof membrane manufacturer. Delete if not required.
			3.	Certification from insulation, manufacturer that all materials supplied comply with identified ASTM, ANSI/SPRI and other industry standards and is compatible with the roof system specified.
		F.	Manufacturers warranties. Executed by manufacturer and provided by the installer upon completion of the roofing system.
	** NOTE TO SPECIFIER ** Select one of the following two report paragraphs as appropriate for the warranty specified. Delete both paragraphs if a warranty is not required.
	** NOTE TO SPECIFIER ** include the following paragraph only when manufacturer's Roofing Membrane Limited Warranty is specified
		G.	Application Reports:
			1.	Application: Submit Mule-Hide Warranty Application Form to manufacturer with a copy to the Architect prior to commencement of work.
	** NOTE TO SPECIFIER ** include the following paragraph only when manufacturer's Standard System or Premium System Warranty is specified
		H.	Inspection Reports:
			1.	Pre-Job Survey: Submit Mule-Hide Warranty Application/Pre-Job Survey Form to manufacturer with a copy to the Architect prior to commencement of work.
			2.	In-Progress Reports: Indicate procedures followed, ambient temperatures, humidity, and wind velocity during application.
	1.7	QUALITY ASSURANCE
		A.	Manufacturer Qualifications: Company specializing in manufacturing products specified in this section with minimum five years documented experience.
	** NOTE TO SPECIFIER ** Roofing system must be installed by a Mule-Hide Warranty Eligible Applicator when a Standard or Premium System Warranty is specified.
		B.	Installer Qualifications: Approved applicator shall be registered with Mule-Hide as a Mule-Hide Warranty Eligible Applicator.
		C.	Pre Roofing Conference:
			1.	Upon completion of roof deck installation and prior to any roofing application, the Contractor shall convene a pre-roofing conference.
			2.	Coordinate pre-roofing conference scheduling with the Architect. Conference shall be attended by the Contractor, Architect, personnel directly responsible for the installation of roofing and insulation, flashing and sheet metal work, mechanical and electrical work, other trades interfacing with the roof work, and representative of the roofing materials manufacturer.
			3.	Provide a copy of meeting notes and action items to all attending parties. Note action items requiring resolution prior to start of roof work.
			4.	Discuss specific expectations and responsibilities, construction procedures, specification requirements, application, environmental conditions, job and surface readiness, material storage, and protection.
		D.	Final Inspection: Provide Manufacturer's representative final inspection of roof to verify roof is in compliance with Mule-Hide's specifications. Submit punch lists for repairs generated during an inspection to the Architect for review upon completion.
	1.8	DELIVERY, STORAGE, AND HANDLING
		A.	Deliver products in manufacturer's unopened packaging clearly labeled with the manufacturer's name, product identification and date of manufacture until ready for installation.
		B.	Protect all materials from damage during transit, storage and delivery to the job site. Place all materials on pallets and protect from moisture. Materials damaged in handling or storage shall not be used.
		C.	Store and protect materials in a dry, clean area protected from the elements in accordance with manufacturer's printed instructions. All adhesive and caulking shall be stored at temperatures between 60 degrees F and 80 degrees F (15.5 degrees C and 26.66 degrees C). Products shall be restored to room temperature prior to use.
		D.	Locate materials temporarily stored on the roof in approved areas, and distribute the load to stay within the combined live and dead load limits of the roof construction.
		E.	Prevent damage to edges and ends of roll materials. Do not install damaged materials. Do not use materials contaminated by exposure or moisture. Remove damaged or contaminated materials from the site.
		F.	Store and dispose of solvent-based materials and materials used with solvent-based materials, in accordance with requirements of manufacturer and local authorities having jurisdiction.
	1.9	PROJECT CONDITIONS
		A.	Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.
		B.	Do not install roofing during high winds or inclement weather, or when there is ice, frost, moisture, or visible dampness on the substrate surface, or when condensation develops on surfaces during application. Unless recommended otherwise by the roofing manufacturer, do not install EPDM sheet when air temperature is below 40 degrees F (4 degrees C) or within 5 degrees F (3 degrees C) of the dewpoint.
		C.	Coordinate the work with other trades to ensure that components that are to be secured to or stripped into the roofing system are available and that permanent flashing and counterflashing are installed as the work progresses.
		D.	Ensure temporary protection measures are in place to preclude moisture intrusion or damage to installed materials.
		E.	Application of roofing must immediately follow application of insulation as a continuous operation. Coordinate roofing operations with insulation work so that all roof insulation applied each day is covered with roof membrane the same day.
	** NOTE TO SPECIFIER ** Select one of the following warranty paragraphs as required for the project and delete those not required. EPDM tie-ins to built-up (BUR) or any other type of roof system are not covered by Mule-Hide warranties.
	A Roofing Membrane Limited Warranty for a maximum of 10 years is available for residential projects. Standard and Premium System warranties are not available for residential projects.
	All Mule-Hide warranties are available for commercial projects using .045 and .060 inch thick reinforced black EPDM..
	The 20 year limited warranty is available for .060 inch thick reinforced black EPDM and requires additional design enhancements. Contact Mule-Hide for additional design information.
	Contact Mule-Hide for other extended warranties that may be available.
	1.10	WARRANTY
	** NOTE TO SPECIFIER ** Select the Roofing Membrane Limited Warranty required from the following paragraphs and delete those not required. This Warranty does not cover workmanship or other components not supplied by Mule-Hide.
		A.	Roofing Membrane Limited Warranty: Provide manufacturers limited 10 year membrane only warranty covering only the Mule-Hide EPDM membrane. This warranty does not cover adhesives, flashings, caulking, other accessories and labor.
		B.	Roofing Membrane Limited Warranty: Provide manufacturers limited 15 year membrane only warranty covering only the Mule-Hide EPDM membrane. This warranty does not cover adhesives, flashings, caulking, other accessories and labor.
		C.	Roofing Membrane Limited Warranty: Provide manufacturers limited 20 year membrane only warranty covering only the Mule-Hide EPDM membrane. This warranty does not cover adhesives, flashings, caulking, other accessories and labor.
	** NOTE TO SPECIFIER ** The Standard System Warranty is a "No Dollar Limit", labor and material warranty that covers the Mule-Hide labeled membrane and other components supplied by Mule-Hide installed by a Mule-Hide Warranty Eligible Applicator. The Standard warranty does not cover insulation or its attachment system. Metal flashing components are not covered under this warranty.
		D.	Standard System Warranty: Provide a standard 10 year roof system warranty covering labor and materials for the Mule-Hide EPDM membrane.
		E.	Standard System Warranty: Provide a standard 15 year roof system warranty covering labor and materials for the Mule-Hide EPDM membrane.
		F.	Standard System Warranty: Provide manufacturers limited 20 year roof system warranty covering labor and materials for the Mule-Hide EPDM membrane.
	** NOTE TO SPECIFIER ** The Premium System Warranty is a "No Dollar Limit", labor and material warranty that covers the Mule-Hide labeled membrane, insulation, other components supplied by Mule-Hide and approved products (such as metal flashing, insulation adhesive or other pre-approved accessories) installed by a Mule-Hide Warranty Eligible Applicator.
		G.	Premium Full System Warranty: Provide a Mule-Hide Premium 10 year full system labor and material warranty.
		H.	Premium Full System Warranty: Provide a Mule-Hide Premium 15 year full system labor and material warranty.
		I.	Premium Full System Warranty: Provide manufacturers limited 20 year roof system warranty covering labor and materials for the Mule-Hide EPDM membrane.
	PART 2	PRODUCTS
	2.1	MANUFACTURERS
		A.	Acceptable Manufacturer: Mule-Hide Products Co., Inc., which is located at: 1195 Prince Hall Dr. ; Beloit, WI 53511; Toll Free Tel: 800-786-1492; Tel: 608-365-3111; Fax: 608-365-7852; Email: request info; Web: www.mulehide.com
	** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
		B.	Substitutions: Not permitted.
		C.	Requests for substitutions will be considered in accordance with provisions of Section 01600.
		D.	All roofing systems components shall be provided by, or approved by the roofing membrane manufacturer.
	2.2	ROOF MEMBRANE
		A.	EPDM Membrane Reinforced: Mule-Hide EPDM membrane is manufactured in accordance with the guidelines of the RMA (Rubber Manufacturers Association), conforms to ASTM D 4637; black color; conforming to the following criteria:
	** NOTE TO SPECIFIER ** Select the paragraph for the Standard or Fire Retardant reinforced EPDM as required and delete the paragraph not required.
			1.	Standard Reinforced EPDM.
			2.	Fire Retardant Reinforced EPDM.
			3.	Thickness:
	** NOTE TO SPECIFIER ** Select the paragraph for the thickness required and delete the paragraph not required.
				a.	0.045 inch (1.1 mm) thick, 0.26 lbs/sf (1.3 kg/sm).
				b.	0.060 inch (1.5 mm), 0.35 lbs/sf (1.7 kg/sm).
	2.3	ACCESSORY MATERIALS
		A.	Splice Adhesive: Mule-Hide Splice Adhesive, a black or white solvent based, synthetic rubber based (butyl) adhesive for splicing EPDM roof membranes and uncured EPDM Flashings.
		B.	Bonding Adhesive (solvent based): Mule-Hide 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 substrates (horizontal and vertical).
		C.	In-Seam Tape: Mule-Hide In-Seam Tape, a cured butyl rubber tape designed to adhere EPDM membrane seams in conjunction with Tape Primer.
		D.	Tape Primer: Mule-Hide Tape Primer, a cleaner specifically formulated to clean and prime EPDM membrane surfaces to be bonded with splice adhesives, In-Seam Tapes or Cured Cover Tape and Uncured Flashing Tape EPDM Laminates.
	** NOTE TO SPECIFIER ** Uncured EPDM Flexible Flashing is easily formed and used to flash pipes, inside and outside corners and various other penetrations that require a moldable product. Uncured Flashing requires the use of Mule-Hide Tape Primer and Mule-Hide Splice Adhesive.
		E.	Flexible Flashings: Mule-Hide Uncured EPDM Flashing; conforming to the following:
			1.	Thickness: 0.060 inch (15.2 mm), 0.39 pounds per square foot.
			2.	Tensile Strength (minimum) ASTM D 412, Standard 1755 psi (12.1 MPA), Fire Retardant 1780 psi (12.3 MPA).
			3.	Elasticity: 50 percent with full recovery without set.
			4.	Color: Black.
	** NOTE TO SPECIFIER ** Use Mule-Hide Uncured Flashing Tape to flash ambient temperature pipes, inside and outside corners, "T-joints" and other penetrations requiring a moldable product. Use Mule-Hide Uncured Flashing Tape in conjunction with Mule-Hide Tape Primer. Uncured Laminated Flashing Tape shall not be used for stripping seams, gravel stops, drip aprons or batten bars.
		F.	Flashing Tape: Mule-Hide Uncured Flashing Tape is an uncured EPDM membrane laminated to cured butyl tape.
		G.	RMS Strips: Mule-Hide RMS Strips, 6 inch (152 mm) wide cured, reinforced EPDM strips used as a base attachment around curbs and walls to mechanically attach the EPDM field sheet. RMS w/ Tape is an RMS strip with 3 inch (76 mm) wide In-Seam Tape applied along one side.
	** NOTE TO SPECIFIER ** Use Cured Cover Tape in conjunction with Mule-Hide Tape Primer.
		H.	Cured Cover Tape: Mule-Hide Cured Laminated Cover Tape, a cured EPDM membrane laminated to cured butyl tape and used as a cover tape to flash gravel stop and drip apron.
		I.	Pourable Sealer: Mule-Hide Pourable Sealer, a two-component, liquid (100 percent solids) polyurethane elastomer for use as a filler for pitch pockets.
		J.	Pipe Boots: Mule-Hide Pipe Boots, an economical premolded EPDM flashing designed for flashing single ambient temperature pipe penetrations.
	** NOTE TO SPECIFIER ** Lap Sealant is used as indicated on Mule-Hide Details.
		K.	Lap Sealant: Mule-Hide Lap Sealant, one part, black or white elastomeric caulk for sealing the exposed edge of field fabricated membrane laps.
		L.	Water Cut-Off: Mule-Hide Water Cut-Off, butyl based, one-component mastic for sealing roofing membranes to wood, metal, concrete, plastic and other substrates.
		M.	All Purpose Bar: Mule-Hide All Purpose Bar, specially extruded aluminum bar, .050 inch (1.3 mm) thick by 1 inch (25 mm) wide by 10 feet (3 m) long, used as an anchor bar, batten bar or as a termination bar.
		N.	Fasteners: Mule-Hide Fasteners, Factory Mutual approved # 14 heavy duty and # 12 drill point fasteners for fastening insulation and Mule-Hide All Purpose Bars to roof decks, curbs and walls.
		O.	Barbed Seam Plates: Mule-Hide Barbed Seam Plates, Factory Mutual approved 2 inch (51 mm) round Galvalume plates with reinforcing ribs used in conjunction with the Mule-Hide HD Fasteners to attach reinforced membrane and RMS strips.
		P.	Metal Stress Plates: Mule-Hide Plates, Factory Mutual approved 3 inch (76 mm) round (26 gauge) Galvalume plates with reinforcing ribs used in conjunction with Mule-Hide Fasteners to attach insulation to roof decks.
	** NOTE TO SPECIFIER ** Edit this following paragraph as required for the project. Thickness minimum is 1 inch or greater as required by the insulation manufacturer to span the flutes of a metal deck. Other roof insulation materials may also be acceptable. Premium warranties are not available for insulation from other manufacturers. Contact the roof membrane manufacturer for additional information.
		Q.	Roof Insulation: Mule-Hide Poly ISO 2 and Poly ISO 1 polyisocyanurate insulation (flat or tapered) are closed-cell polyisocyanurate foam cores laminated to heavy, black (non-asphaltic) glass fiber reinforced felt facers conforming to ASTM C 1289, Type II, Class I, faced rigid cellular polyisocyanurate roof insulation, with the following characteristics:
			1.	Board Density: ________ lb/cu ft (_______ kg/cu m).
			2.	Board Size: ____ by ____ inch (____ by ____ mm).
			3.	Board Thickness: ________ inches (________ mm).
			4.	Board Edges: square.
			5.	Thermal Conductivity: K factor of ______ (ksi factor of ______).
			6.	Compressive Strength: Minimum of:
				a.	16 psi (110 kPa).
				b.	20 psi (138 kPa).
				c.	25 psi (172 kPa).
	** NOTE TO SPECIFIER ** The use and placement of a vapor retarder should be determined by an architect or engineer. Mule-Hide does not require the use of vapor retarders. However, Mule-Hide recommends that a vapor retarder be considered when the outside average January temperature is below 40 degrees F, and the expected interior winter relative humidity is 45 percent or greater. Vapor retarders shall meet specified codes and insurance requirements and be compatible with insulation and other accessories. Delete if not required.
		R.	Vapor Retarder: Specified in Section 07260.
	** NOTE TO SPECIFIER ** Wood Nailers shall be of a height sufficient to match the thickness of the insulation being used. Wood nailers are required for the attachment of drip aprons, gravel stops and certain expansion joints and may be required for metal scuppers, pitch pockets and certain types of curbs. Wood nailers shall be attached to withstand a minimum force of 200 lbs. in any direction. All nailers shall have a minimum of 2 fasteners per board.
		S.	Wood Nailers: Specified in Section 06100.
	** NOTE TO SPECIFIER ** Sheet metal components such as gravel stops, drip aprons, counterflashings, copings, etc., should be fabricated and installed in accordance with the SMACNA requirements.
		T.	Sheet Metal Flashing and Trim: Specified in Section 07620.
	PART 3	EXECUTION
	3.1	EXAMINATION
		A.	Do not begin installation until substrates have been properly prepared to receive Work.
		B.	Verify deck is supported and secure.
		C.	Verify deck is clean and smooth, free of depressions, waves, or projections, properly sloped to drains and suitable for installation of roof system
		D.	Verify deck surfaces are dry and free of snow or ice.
	** NOTE TO SPECIFIER ** Use the following two paragraphs for wood or concrete decks. Delete if not required.
		E.	Confirm dry deck by moisture meter with moisture content acceptable to roofing manufacturer.
		F.	Verify adjacent precast concrete roof members do not vary more than 1/4 inch (6 mm) in height. Verify grout keys are filled flush.
		G.	Verify roof openings, curbs, pipes, sleeves, ducts, and vents through roof are solidly set, and wood cant strips, wood nailing strips and reglets as required are in place.
	** NOTE TO SPECIFIER ** On all reproofing projects verify the condition of the deck or substrate and to confirm the roof deck can withstand the additional dead load. Delete if not applicable.
		H.	Verify the roof deck and structural system can support the additional dead load of the roofing materials.
		I.	If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
	3.2	PREPARATION
	** NOTE TO SPECIFIER ** Mechanically Attached Mule-Hide EPDM Membrane Roofing System may be used over the following deck substrates provided that an acceptable insulation is installed over the substrate as required. Select the paragraph(s) required and delete those not required.
		A.	Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
	** NOTE TO SPECIFIER ** Wood decking, 1 inch minimum thickness conforming to FM Class I decks. APA rated Plywood, 15/32 inch minimum thickness. APA rated Oriented Strand Board, 7/16 inch minimum thickness. Deck shall be installed over joists that are spaced no greater than 24 inches on center.
		B.	Wood Deck:
			1.	Verify flatness and tight joints of wood decking.
			2.	Seal joints of decking with tape.
			3.	Fill knot holes with latex filler.
	** NOTE TO SPECIFIER ** Cast in place structural concrete, pre-cast and pre-stressed concrete (3,000 psi. minimum).
		C.	Concrete Deck:
			1.	Fill surface honeycomb and variations with latex filler.
	** NOTE TO SPECIFIER ** Structural metal deck, 22 gauge minimum conforming to FM Loss Prevention Data Sheet 1-28 with approved insulation.
		D.	Metal Deck:
			1.	Verify framed openings, drain locations, flatness and secure attachment of deck to structure.
	** NOTE TO SPECIFIER ** Cementitious Fiber Substrates (Tectum, etc), Lightweight Concrete and Gypsum Decks may be acceptable upon confirmation that the material is dry, sound and adequate to support the load.
		E.	Cementitious or Gypsum Deck:
			1.	Fill surface honeycomb and variations with latex filler.
		F.	Clean surfaces thoroughly prior to installation.
	** NOTE TO SPECIFIER ** Edit the following two paragraphs for preparation of existing roof decks and/or re-roofing projects as required. Delete if not required.
		G.	Existing Decks:
			1.	Verify flatness and tight joints of wood decking.
			2.	Inspect substrates and correct defects before application of roofing membrane.
			3.	Determine the condition of the existing roof deck and roofing system. Areas with deteriorated decking or wet insulation or other failed materials shall have those affected materials removed and replaced.
			4.	Make sure all decking is securely fastened.
			5.	Eliminate significant ponding by installing tapered insulation to create positive drainage of the roof surface or by installing new drains.
	** NOTE TO SPECIFIER ** Sprayed in place urethane foam roof systems are not acceptable substrates for Mule-Hide Single-Ply roof systems and must be removed. If a Mule-Hide Premium warranty is requested, the existing roof system must be removed to the structural deck prior to the installation of the new roofing system; or a moisture survey must be taken, all wet areas removed and a copy of the survey submitted to Mule-Hide prior to application of the roofing. Delete paragraphs if not required.
		H.	Recover Projects
			1.	Remove all loose gravel from existing gravel surfaced built-up roofs. Use an acceptable insulation over existing surface as a protection course for the EPDM membrane.
			2.	Existing single-ply roof membrane shall be cut up into maximum 10 foot by 10 foot (3.05 m by 3.05 m) sections to prevent entrapment of water between the two roof systems.
			3.	Completely remove sprayed in place urethane foam roof systems.
			4.	Use an acceptable insulation over existing smooth surfaced built-up roof systems and mineral surfaced systems.
	3.3	INSTALLATION GENERAL
		A.	Install in accordance with manufacturer's instructions.
			1.	Install only as much new roofing as can be made watertight each day shall be installed each day. This includes all flashing work.
			2.	Take precautions to prevent wind blow-off or wind damage during the course of the roofing application.
			3.	Temporary waterstops shall be installed at the end of each day's work and removed at the start of the next day's work and disposed of properly. Waterstops shall be compatible with all materials.
			4.	Do not install the EPDM Roofing Membrane in direct contact with any product containing coal tar pitch, creosote or penta-based materials. Consult the manufacturer for special installation requirements.
			5.	Do not allow contaminants such as petroleum, grease, acid, solvents, vegetable or mineral oil, animal oil, animal fat, etc. or direct steam venting to come into direct contact with the EPDM Roofing Membrane. Consult the manufacturer for recommendations if such conditions exist.
			6.	All work shall be scheduled and executed without exposing interior building areas to the effects of inclement weather. The existing building and its contents shall be protected against all risks.
	** NOTE TO SPECIFIER ** Use the following vapor barrier paragraph if required for the project. Delete if not required. The roofing manufacturer does not require the use of vapor retarders and the use and placement of a vapor retarder should be determined by the Architect. If used, vapor retarders must be compatible with insulation and other accessories and meet applicable codes and insurance requirements.
		B.	Vapor Retarder Application: Install as specified in Section 07260.
	** NOTE TO SPECIFIER ** Select and edit one of the following Insulation Application paragraphs as required for the project and delete those paragraphs not required. Consider UL requirements for Class A, B, C and FM requirements for Class I and II roofs and FM requirements for insulation to be mechanically fastened at perimeter of roof area or full surface area, depending on system, to resist wind uplift.
	** NOTE TO SPECIFIER ** Mule-Hide does not recommend taping the joints of the insulation as the use of tapes may cause loose areas of adhesion of the membrane to the insulation.
	** NOTE TO SPECIFIER ** Use the following paragraph for adhesive application of insulation with supplementary mechanical fasteners at roof area perimeter. Delete if not applicable.
		C.	Insulation Application: Apply using adhesive with supplemental mechanical fasteners at the roof perimeter:
			1.	Ensure surface is clean and dry.
			2.	Apply adhesive to deck. Embed insulation into adhesive with full contact.
	** NOTE TO SPECIFIER ** Use the following paragraphs when two or more layer of insulation are required. Delete if not applicable.
			3.	Apply adhesive to top surface of insulation. Embed second layer of insulation into adhesive, with joints staggered minimum 8 inches (203 mm) from joints of first layer.
			4.	Mechanically fasten insulation at the perimeter, corners and field of the roof in accordance with the fastening pattern and the type fasteners required by the manufacturer to meet the design and performance requirements specified.
	** NOTE TO SPECIFIER ** Use the following paragraph when tapered insulation is required. Delete if not applicable.
			5.	Place constant thickness first layer and tapered thickness insulation second layer to required slope pattern.
			6.	Minimum Total Insulation:
				a.	Thickness: ________ inch (________ mm).
				b.	As required to achieve insulation R-Value of ________ (RSI value of ________).
				c.	To average R-Value of ________ (RSI value of ________) for tapered insulation.
			7.	Place boards perpendicular to deck flutes with edges centered over flange surface for bearing support.
			8.	Lay boards with edges in moderate contact without forcing. Cut insulation to fit neatly to perimeter blocking and around penetrations through roof.
			9.	Lay tapered boards tight to roof drains for positive drainage.
			10.	Apply no more insulation than can be covered with membrane in same day.
	** NOTE TO SPECIFIER ** Use the following paragraph for full roof area mechanical fastening of insulation. Delete if not applicable.
		D.	Insulation Application: Mechanically fastened insulation.
			1.	Ensure surface is clean and dry.
			2.	Mechanically fasten insulation at the perimeter, corners and field of the roof in accordance with the fastening pattern and the type fasteners required by the manufacturer to meet the design and performance requirements specified.
			3.	Place second layer of insulation with joints staggered minimum 8 inches (203 mm) from joints of first layer.
	** NOTE TO SPECIFIER ** Use the following paragraph when tapered insulation is required. Delete if not applicable.
			4.	Place constant thickness first layer and tapered thickness insulation second layer to required slope pattern.
			5.	Minimum Total Insulation:
				a.	Thickness: ________ inch (________ mm).
				b.	As required to achieve insulation R-Value of ________ (RSI value of ________).
				c.	To average R-Value of ________ (RSI value of ________) for tapered insulation.
			6.	Place boards perpendicular to deck flutes with edges centered over flange surface for bearing support.
			7.	Lay boards with edges in moderate contact without forcing. Cut insulation to fit neatly to perimeter blocking and around penetrations through roof.
			8.	Lay tapered boards tight to roof drains for positive drainage.
			9.	Apply no more insulation than can be covered with membrane in same day.
	** NOTE TO SPECIFIER ** Use the following paragraph for Mechanically Attached EPDM Roofing System. Consult the manufacturers Standard Details for additional information.
	3.4	INSTALLATION MECHANICALLY ATTACHED EPDM ROOFING SYSTEM
	** NOTE TO SPECIFIER ** The following three paragraphs are alternative securement systems for Mechanically Attached EPDM Roofing System only. Select the required securement system and delete the ones not required. Consult the manufacturers Standard Details for additional information.
		A.	Membrane Mechanically Attached Securement:
			1.	General:
				a.	Use the widest sheet sizes practical for the work.
				b.	Roll out membrane, free from wrinkles or tears. Place sheet into place without stretching.
				c.	Run membrane perpendicular to the direction of steel deck flutes and orientation of wood decks where possible.
				d.	Allow the membrane to relax at least 30 minutes prior to installation. Inspect and remove any damaged membrane.
				e.	Overlap edges and ends a minimum 6 inches (152 mm) to allow for field splice.
				f.	Shingle joints on sloped substrate in direction of drainage.
				g.	Conform to special design layout of the roof's perimeter and corners for installation in high wind areas.
			2.	Membrane Installation:
				a.	After carefully positioning several sheets of the EPDM membrane, smooth out the sheet to remove any wrinkles.
				b.	Install perimeter sheets parallel to each roof edge or wall.
				c.	Install 2 inch (51 mm) barbed seam plates, centered 3 inches (76 mm) from the edge of the 6 inch 152 mm) sheet lap. This will center the plates in the seam.
				d.	Fasten the seam plate with Heavy Duty Fasteners at maximum 12 inches 305 mm) on center with fasteners a maximum of 1 inch (25.5 mm) from the end and starting at one end of the seam and working to the other end.
				e.	Wrinkles that transmit through the seams must be cut out and patched using cured sheet.
				f.	Extend membrane up cant strips to a minimum of 1 inch (25 mm) onto vertical surfaces and 2 inches (51 mm) over edge of roof.
	** NOTE TO SPECIFIER ** Select one of the following seaming paragraphs for adhesive spliced or in-seam tape. Use of In-Seam Tape is the preferred method of seaming. Delete paragraph not required.
			3.	Adhesive spliced seams.
				a.	All surfaces to be spliced shall be clean and dry. Prepare each seam surface and complete each seam in accordance with the manufacturers instructions.
				b.	If fishmouths or wrinkles occur through the seam, cut out and patch with cured membrane or cured cover tape that is at least 3 inches (76 mm) larger than the area that has been cut out. Round the corners of the patch.
			4.	In-Seam Tape seams.
				a.	All surfaces to be spliced shall be clean and dry. Prepare each seam surface and complete with in-seam tape in accordance with the manufacturers instructions.
				b.	If fishmouths or wrinkles occur through the seam, cut out and patch with cured membrane or cured cover tape that is at least 3 inches (76 mm) larger than the area that has been cut out. Round the corners of the patch.
		B.	Perimeter, Edge and Opening Membrane Mechanical Securement: Provide additional mechanical securement at the perimeter of each roof level, base of walls, curbs, skylights, expansion joints, tie-ins, interior walls, bottom of valleys and angle changes that exceed inclines of 2 inches (51 mm) or greater per foot and at penetrations as required by the manufacturer. Install mechanical securement in accordance with the manufacturers requirements. Provide mechanical attachment of the membrane by the following methods:
			1.	Mule-Hide All Purpose Bar:
				a.	Extruded aluminum bar pre-punched with holes 6 inches (152 mm) on center. Place bar horizontally or vertically in accordance with the manufacturers Standard Details for the proper placement of the bar.
				b.	Maximum spacing of the fasteners shall not exceed 12 inches on center with fasteners a maximum of 1 inch (25.5 mm) from the end of each bar. Space adjoining bars approximately 1/2 inch (12.5 mm) to 1 inch (25.5 mm) apart. All cut bars shall be deburred.
				c.	All Purpose Bar shall be stripped with cured cover tape or cured field sheet. Do not use uncured flashing material.
				d.	Installed bar a minimum of 3 inches to a maximum of 6 inches (152 mm) from inside and outside corners.
			2.	Mule-Hide RMS (Reinforced Membrane Strip) attachment strip:
				a.	6 inch (152 mm) wide reinforced strip of EPDM membrane for use at the base of walls and curbs. Attached with Mule-Hide 2 inch (51 mm) barbed seam plates either horizontally or vertically with appropriate fasteners. Install RMS is prior to the placement of the field sheet.
				b.	Clean and splice the RMS and field sheet in accordance with the manufacturers instructions.
				c.	Space RMS strips a maximum of 1 inch (25.5 mm) apart. It is not required to overlap the RMS.
				d.	For vertical attachment, the RMS membrane must extend a minimum of 3 inches (76 mm) onto the horizontal surface (roof substrate). Installation of the plates must be a minimum of 6 inches (152 mm) to a maximum of 9 inches (229 mm) from the inside and outside corners.
				e.	For horizontal attachment, the membrane must be placed a maximum of 1/2 inch from the base of the angle change extending out onto the horizontal surface (roof substrate). The 2 inch (51 mm) barbed plate must be placed a minimum of 1/2 inch (12.5 mm) to a maximum of 1 inch (25.5 mm) from the exterior edge of the strip.
				f.	Installation of the plates must be a minimum of 6 inches (152 mm) to a maximum of 9 inches (227 mm) from the inside and outside corners.
			3.	Drip Apron and Gravel Stop:
				a.	Metal flange shall extend a minimum of 3 inches (76 mm) onto the wood nailer. Wood nailer must be wider than the metal flange. Install with approved screw fasteners a maximum of 6 inches (152 mm) on center and 1/2 inch (12,5 mm) to 3/4 inch (19 mm) from the inside edge of the metal flange. Ring shank nails spaced a maximum of 4 inches (102 mm) on center may also be used.
				b.	Prime all drip aprons and gravel stops with Mule-Hide's Tape Primer and stripped with Mule-Hide's Cured Cover Tape. Clean the metal with solvent to remove oil film prior to installing and priming with the Mule-Hide Tape Primer.
				c.	Caulk the edge of the Cured Cover Tape overlapping the metal flange with Lap Sealant. Also caulk areas where water flows over a drip apron and both sides of the Cured Cover Tape.
	3.5	INSTALLATION FLASHING AND ACCESSORIES
		A.	Metal Flashings: Provide metal flashings and counter flashing in accordance with Section 07620 - Sheet Metal Flashing and Trim.
		B.	EPDM Flashings and Accessories: Flash all walls, parapets, curbs and penetrations with cured EPDM membrane where possible. Limit the use of uncured EPDM flashing or Uncured Flashing Tape to those areas such as corners, pipes, scuppers, patches over "T-joints", patches at the base of all vertical field seams (at the angle change) and other shaped penetrations that require the flashing to be molded and cured product are not practical.
			1.	Vertical Wall, Curb and Skylight Flashings
				a.	Use cured EPDM membrane to flash all vertical surfaces except when flashing inside and outside corners or other details that require the flashing to be molded. Use one of the following two basic methods.
					1)	With RMS strip as the mechanical attachment, continued the field sheet up the vertical surface to the point of termination.
					2)	With All Purpose Bar as the mechanical attachment, the field sheet is turned up the vertical surface. Cured EPDM membrane is used to flash over the bars and is continued up the vertical surface to the point of termination.
				b.	Minimum height of the flashing on a vertical surface is 8 inches (203 mm) where possible.
				c.	Do not cover installed through-wall counterflashings, weep holes and overflow scuppers with EPDM membrane flashings. Termination of the membrane must be below the through-wall counterflashings.
			2.	Pipe Flashings:
				a.	Flash single pipe penetrations with premanufactured pipe boots where possible. Where a boot cannot be used, Uncured Flashing or Uncured Flashing Tape may be used.
				b.	Flash hot pipes exceeding 180 degrees with an insulated cold collar (sleeve) to which the flashings may be adhered. Cold collars require the use of rain hoods to prevent leakage.
				c.	Use pitch pans if required to seal pipe clusters where boots or field fabrication is not possible. Pitch pans may also be required for irregular objects of such a configuration that prevents standard flashing procedures.
			3.	Drains and Scuppers
				a.	Cured membrane must be flashed to the vertical surface prior to the installation of new scuppers. Scuppers must have welded watertight corners, be set in Water Cut-Off and secured to the wall and deck (or wood nailer) with the appropriate fasteners.
				b.	Coordinate installation of roof drains and related flashings.
			4.	Control and Expansion Joints:
				a.	Install prefabricated roofing control and expansion joints to isolate roof into areas as indicated on Drawings. Make joints watertight.
		C.	Temporary Night Seals (Water-Cut Off Sealers)
			1.	Install temporary cutoffs around incomplete edges of roofing assembly at the end of each day's work and when work must be postponed due to inclement weather.
	** NOTE TO SPECIFIER ** Use the following paragraph for tie ins with built-up roofing only. Delete if not required.
			2.	For temporary tie-ins to existing BUR roof systems, remove all gravel, dirt and debris from the tie-in area and make sure all surfaces are clean and dry.
	** NOTE TO SPECIFIER ** Use the one of the following paragraphs for water cut off sealers. Delete the one not required.
			3.	Seal all loose membrane edges with Mule-Hide's Water Cut-Off or Pourable Sealer to prevent water migration under finished roof sections.
			4.	Remove temporary cutoffs at the start of the next day's work and disposed of properly.
	** NOTE TO SPECIFIER ** Include the following paragraphs for walkways. Delete the one not required. Provide walkways in areas where routine rooftop maintenance occurs and in areas where regular rooftop traffic is expected including all roof access points such as doors, hatches and ladders and around rooftop mechanical equipment.
		D.	Walkway Installation:
	** NOTE TO SPECIFIER ** Use the one of the following paragraphs and delete the one not required.
			1.	Install rubber walk pads adhered directly to the roof surface in the locations indicated on the Drawings. Do not install walk pads over field seams or flashings.
			2.	Install masonry paver blocks as walkways over an EPDM membrane or polyester slipsheet protection membrane in the locations indicated on the Drawings.
	3.6	CLEANING
		A.	In areas where finished surfaces are soiled by Work of this section, consult manufacturer of surfaces for cleaning advice and conform to their instructions.
		B.	Repair or replace defaced or disfigured finishes caused by Work of this section.
	3.7	PROTECTION
		A.	Protect installed products until completion of project.
		B.	Sequence work to avoid use of newly constructed roofing for storage, walking surfaces and equipment movement.
		C.	Provide plywood or polyester felt protection where required to prevent damage to installed roofing.
		D.	Protect building surfaces against damage from roofing work.
		E.	Touch-up, repair or replace damaged products before Substantial Completion.
	END OF SECTION