SECTION 07 54 19

POLYVINYL CHLORIDE (PVC) MEMBRANE ROOFING

Display hidden notes to specifier. (Don't know how? Click Here) 
 Copyright 2024 -  2024 ARCAT, Inc. - All rights reserved

PART 1    GENERAL
1.1	Section INCLUDES
A.	Adhered PVC membrane roofing system.
B.	Mechanically fastened PVC membrane roofing system.
C.	Induction welded PVC membrane roofing system.
D.	Cover board.
E.	Roof insulation.
F.	Vapor retarder.
G.	Base sheet.
H.	Substrate board.
1.2	RELATED SECTIONS 
A.	Division 03 Section - Lightweight Insulating Concrete. For lightweight insulating concrete.
B.	Division 03 Section - Concrete. For concrete. 
C.	Division 05 Section - Steel Decking. For steel roof deck.
D.	Division 06 Section - Miscellaneous Rough Carpentry. For wood nailers, cants, curbs, and blocking. For wood-based, structural-use roof deck panels.
E.	Division 07 Section - Sheet Metal Flashing and Trim. For flashings and counter flashings.
F.	Division 22 Section - Storm Drainage Piping Specialties. For roof drains.
1.3	REFERENCES
A.	Roofing Terminology: Refer to the following publications for definitions of roofing work related terms in this Section:
1.	ASTM D 1079 "Standard Terminology Relating to Roofing and Waterproofing."
2.	Glossary of NRCA's "The NRCA Roofing and Waterproofing Manual."
3.	Roof Consultants Institute "Glossary of Building Envelope Terms."
4.	Single Ply Roofing Industry (SPRI)
5.	International Building Code (IBC) 
6.	American Society of Civil Engineers (ASCE-7) Minimum Design Loads for Buildings & Other Structures 
B.	Sheet Metal Terminology and Techniques: SMACNA "Architectural Sheet Metal Manual."
1.4	SUBMITTALS
A.	Product Data: Manufacturer's data sheets for each product to be provided.
B.	Detail Drawings: Provide roofing system details and details of attachment to other work, including:
1.	Base flashings and membrane terminations.
2.	Tapered insulation, including slopes.
3.	Crickets, saddles, and tapered edge strips, including slopes.
4.	Insulation fastening and adhesive patterns.
C.	Verification Samples: Provide for each product specified.
D.	Installer Certificates: Confirmation that Installer is approved, authorized, or licensed by manufacturer to install roofing system.
E.	Maintenance Data: Refer to Johns Manville's latest published documents on www.JM.com.
F.	Guarantees: Provide manufacturer's current guarantee specimen.
G.	Prior to roofing system installation, roofing sub-contractor shall provide a copy of the Guarantee Application Confirmation document issued by Johns Manville Roofing Systems indicating that the project has been reviewed for eligibility to receive the specified guarantee and registered. 
1.5	QUALITY ASSURANCE
A.	Installer Qualifications: Qualified firm that is approved, authorized, or licensed by roofing system manufacturer to install manufacturer's product who is eligible to receive the specified manufacturer's guarantee.
B.	Manufacturer Qualifications: Qualified domestic U.S. owned and based manufacturer that has UL listing or accredited testing agency listing for roofing system identical to that used for this Project.
C.	Testing Agency Qualifications: An independent testing agency with the experience and capability to conduct the testing indicated, as documented according to ASTM E 329.
D.	Test Reports:
1.	Roof drain and leader test or submit plumber's verification. 
2.	Core cut, if required.
3.	Roof deck fastener pullout test, if required.
E.	Moisture Survey, If Required:
1.	Submit prior to installation, results of a non-destructive moisture test of roof system completed by approved third party. Utilize one of the approved methods:
a.	Infrared Thermography 
b.	Nuclear Backscatter
F.	Source Limitations: Obtain all components from the single source roofing manufacturer guaranteeing the roofing system. All products used in the system shall be labeled by the single source roofing manufacturer issuing the guarantee.
1.6	PRE-INSTALLATION CONFERENCE
A.	Convene a conference approximately two weeks before scheduled commencement of the Work. Attendees shall include Architect, Contractor and trades involved. Agenda shall include schedule, responsibilities, critical path items and approvals.
1.7	DELIVERY, STORAGE, AND HANDLING
A.	Deliver roofing materials in original containers with seals unbroken and labeled with manufacturer's name, product brand name and type, date of manufacture, and directions for storage.
B.	Store liquid materials in their original undamaged containers in a clean, dry, protected location and within the temperature range required by roofing system manufacturer.
C.	Protect roof insulation materials from physical damage and from deterioration by sunlight, moisture, soiling, and other sources. Comply with insulation manufacturer's written instructions for handling, storing, and protecting during installation.
D.	Handle and store roofing materials and place equipment in a manner to avoid permanent deflection of deck.
1.8	COORDINATION
A.	Coordinate work of this Section with existing warranties with building Owner's representative to verify compliance.
B.	Coordinate installation of roof system components so insulation and cover board are not exposed to precipitation or left exposed at the end of the workday or when rain is imminent.
1.	Tie-off and cover exposed roofing membrane sheets and insulation at end of each day's work.
2.	Complete terminations and base flashings and provide temporary seals to prevent water from entering completed sections of roofing system.
3.	Remove and discard temporary seals before beginning work on adjoining roofing.
1.9	PROJECT CONDITIONS
A.	Weather Limitations: Proceed with installation only when current and forecast weather conditions permit roofing system to be installed in accordance with manufacturer's written instructions and guarantee requirements.
1.10	GUARANTEE
A.	Provide manufacturer's system guarantee equal to Johns Manville's Peak Advantage No Dollar Limit Roofing System Guarantee.
1.	Single-source special guarantee includes:
a.	Roofing membrane, base flashings, and roofing membrane accessories. 
b.	Roof insulation
c.	Fasteners
d.	Adhesives
e.	Cover board
f.	Substrate board
g.	Vapor retarder
h.	Base sheet
i.	Walkway products
j.	Manufacturer's expansion joints
k.	Manufacturer's edge metal products
l.	Other approved single-source components of roofing system marketed by the manufacturer.
2.	Guarantee Period: from date of Substantial Completion.
a.	Years: 10.
b.	Years: 15.
c.	Years: 20.
d.	Years: 25. 
e.	Years: 30.
3.	Contractor is required to list the Specifier/Consultant of record in the appropriate fields ("Specifier Account") when applying for the manufacturer's warranty.
B.	Installer's Guarantee: Submit roofing Installer's guarantee, including all components of roofing system for the following guarantee period:
1.	Guarantee Period: From date of Substantial Completion.
a.	Years: 2.
b.	Years: 5.
C.	Existing Guarantees: Guarantees on existing building elements should not be affected by scope of work.
1.	Installer is responsible for coordinating with building owner's representative to verify compliance.
PART 2    PRODUCTS
2.1	MANUFACTURERS
A.	Acceptable Manufacturer: Johns Manville which is located at: 717 17th St. P.O. Box 5108; Denver, CO 80217-5108; Toll Free Tel: 800-654-3103; Tel: 303-978-2499; Email: ________; Web: www.jm.com.
B.	Substitutions: Not permitted.
C.	Requests for substitutions will be considered in accordance with the provisions of Section 01 60 00.
2.2	PERFORMANCE AND DESIGN REQUIREMENTS
A.	Installed Roofing Membrane System: To remain watertight, resist specified wind uplift pressures, thermally induced movement, and exposure to weather without failure.
B.	Roofing Materials Compatibility: Compatible with one another under conditions of service and application required, as demonstrated by roofing system manufacturer based on testing and field experience.
C.	Installer: Comply with current code requirements based on authority having jurisdiction.
D.	Wind Uplift Performance of Roofing System: Meet intent of systems that have been successfully tested by a qualified testing and inspecting agency to resist wind uplift pressure calculated in accordance with ASCE 7.
E.	Fire-Test-Response Characteristics: Provide roofing materials with the fire-test-response characteristics indicated as determined by testing identical products per test method below by UL, FMG, or another testing and inspecting agency acceptable to authorities having jurisdiction. Materials shall be identified with appropriate markings of applicable testing and inspecting agency.
1.	Exterior Fire-Test Exposure: 
a.	Class A; UL 790, for application and roof slopes indicated.
b.	Class B; UL 790, for application and roof slopes indicated.
c.	Class C; UL 790, for application and roof slopes indicated.
F.	FMG Listing: Roofing membrane, base flashings, and component materials shall comply with requirements in FMG 4450 a d FMG 4470 as part of a roofing system and that are listed in FMG's "RoofNav" for Class 1 or noncombustible construction, as applicable. Identify materials with FMG markings. 
1.	Roofing System shall comply with RoofNav No. _____. 
2.	Fire/Windstorm Classification: Class NC. 
3.	Fire/Windstorm Classification: Class 1. 
4.	Fire/Windstorm Classification: Class ____. 
5.	Heat Resistance Rating: _____.
2.3	POLYVINYL-CHLORIDE ROOFING MEMBRANE (PVC):
A.	PVC Sheet: ASTM D 4434, Type III, fabric reinforced 
1.	Basis of Design: JM PVC SD Plus.
a.	Thickness: 50 mils (1.27 mm), nominal. 
b.	Thickness: 60 mils (1.52 mm), nominal. 
c.	Thickness: 60 mils (1.52 mm), minimum. 
d.	Thickness: 80 mils (2.03 mm), nominal. 
e.	Thickness: 80 mils (2.03 mm), minimum. 
2.	Basis of Design: JM PVC SD Plus FB.
a.	Thickness: 60 mils (1.52 mm), nominal. 
b.	Thickness: 80 mils (2.03 mm), nominal. 
3.	Basis of Design: JM PVC. Contains KEE (Elvaloy) to reduce plasticizer migration.
a.	Thickness: 50 mils (1.27 mm), nominal. 
b.	Thickness: 60 mils (1.52 mm), nominal. 
c.	Thickness: 60 mils (1.52 mm), minimum. 
d.	Thickness: 72 mils (1.83 mm), minimum. 
e.	Thickness: 80 mils (2.03 mm), nominal.
4.	Basis of Design: JM PVC FB. Contains KEE (Elvaloy) to reduce plasticizer migration.
a.	Thickness: 60 mils (1.52 mm), nominal.
b.	Thickness: 60 mils (1.52 mm), minimum.
c.	Thickness: 80 mils (2.03 mm), nominal.
5.	Fabric Fleece Backed
6.	Exposed Face Color: White.
7.	Exposed Face Color: Grey.
8.	Exposed Face Color: Sandstone. 
B.	General: Auxiliary materials recommended by roofing system manufacturer for intended use and compatible with membrane roofing.
1.	Liquid-type auxiliary materials shall meet VOC limits of authorities having jurisdiction. 
C.	Sheet Flashing: Manufacturer's internally reinforced or scrim reinforced, smooth backed membrane with same color as sheet membrane.
1.	Basis of Design: JM PVC 60 mil.
D.	Bonding Adhesive: Manufacturer's standard.
1.	Bonding Adhesive: Solvent-based for membrane. 
2.	Bonding Adhesive: Water-based for membrane. 
3.	Basis of Design: JM PVC Membrane Adhesive (Low VOC).
4.	Basis of Design: JM PVC All Season Sprayable Bonding Adhesive (bare back only).
5.	Basis of Design: JM PVC Water Based Membrane Adhesive
E.	Flashing Adhesive: 
1.	Bonding Adhesive: Solvent-based for base flashings. 
2.	Bonding Adhesive: Water-based for base flashings. 
3.	Basis of Design: JM PVC Membrane Adhesive (Low VOC).
4.	Basis of Design: JM PVC All Season Sprayable Bonding Adhesive.
5.	Basis of Design: JM PVC Water Based Membrane Adhesive
F.	Urethane Adhesive: Manufacturer's standard two component no VOC adhesive for fleece backed membranes. 
1.	Basis of Design: JM Roofing System Urethane Adhesive (RSUA)
G.	Urethane Adhesive: Manufacturer's self-contained two-part, low-rise foam adhesive formulated to adhere fleece-backed membranes to substrate. 
1.	Basis of Design: JM Two-Part Urethane Insulation Adhesive Canister
H.	Roofing Asphalt: ASTM D 312, Type IV.
I.	Asphalt Primer: ASTM D 41. Basis of Design: JM Asphalt Primer.
J.	Liquid Applied Flashing: Manufacturer's single ply liquid and fabric reinforced flashing system created with a fleece polyester scrim and a two-component polyurethane based liquid applied flashing material, consisting of a liquid resin and a curing agent. 
1.	Basis of Design: JM SP Liquid Flashing Resin and JM SP Liquid Flashing Scrim
K.	Liquid Applied Flashing Primer: Manufacturer's single ply liquid flashing primer.
1.	Basis of Design: JM SP Liquid Flashing TPO and PVC Primer.
2.	Basis of Design: JM SP Liquid Flashing Concrete Primer. 
3.	Basis of Design: JM SP Liquid Flashing Metal and Wood Primer.
L.	Slip Sheet: Minimum 9.0 oz per sq yard, needle punched, UV-resistant polyester fabric slip sheet, as required for application. 
1.	Basis of Design: JM Polyester Mat Protection Slipsheet
M.	Metal Termination Bars: Manufacturer's standard predrilled stainless-steel or aluminum bars, with anchors. 
1.	Basis of Design: JM Termination Systems 
N.	Fasteners: Factory-coated steel all-purpose fasteners and high load metal plates meeting corrosion-resistance provisions in FMG 4470, designed for fastening membrane to substrate, and acceptable to membrane roofing system manufacturer. 
1.	Basis of Design: High Load Fasteners and Plates.
2.	Basis of Design: Extra High Load Fasteners and Plates.
3.	Basis of Design: All Purpose Fasteners and High Load Plates. 
4.	Basis of Design: JM Purlin Fasteners.
5.	Basis of Design: ________.
O.	Induction Welding Plate: A round specially coated Galvalume plate with a recessed center and raised flat bonding surface specifically designed for induction welding application. 
1.	Basis of Design: JM PVC RhinoPlate
P.	Polymer Fasteners: Glass-reinforced nylon fasteners with 1/4 inch (6 mm) square drive and 1 inch (25 mm) head with Galvalume-coated 2 inch (51 mm) metal stress plates, designed to lock into the fastener head. Fasteners designed for fastening roof insulation to substrate and furnished by roofing system manufacturer. 
1.	Basis of Design: Polymer Auger Fasteners and Plates.
Q.	Miscellaneous Accessories: Provide all accessories to meet the roofing manufacturer's guarantee requirements. 
2.4	WALKWAYS and safety strips
A.	Flexible Walkways: Factory-formed, nonporous, heavy-duty, slip-resisting, surface-textured walkway pads sourced from membrane roofing system manufacturer. 
1.	Basis of Design: JM PVC Heavy Duty Walkpad.
2.	Basis of Design: JM PVC Walkpad.
B.	Safety Strips (As Applicable): Manufacturer's minimum 45 mils, reinforced, UV-resistant PVC (polyvinyl chloride) with Elvaloy KEE (ketone ethylene ester) safety warning line for roof perimeters. 
1.	Basis of Design: JM PVC Safety Strip 
a.	Exposed Face Color: Yellow
2.5	COVER BOARD
A.	Polyisocyanurate Board: ASTM C 1289, Type II, Class I, Grade 2 (20psi). Polyisocyanurate bonded in-line to fiber glass reinforced.
1.	Basis of Design: SeparatoR.
a.	Bonded in-line to Facer: Fiber glass reinforced.
b.	Class: 1.
c.	Grade: 2 (20 psi).
B.	Polyisocyanurate Board: ASTM C 1289, Type II, Class 2, Grade 3 (25psi). Polyisocyanurate bonded in-line to inorganic coated glass facer. 
1.	Basis of Design: SeparatoR CGF.
a.	Bonded in-line to Facer: Inorganic coated glass.
b.	Class: 2.
c.	Grade: 3 (25 psi).
C.	Perlite Board: ASTM C 728, Type 3; composed of expanded perlite, cellulosic fibers, binders, and waterproofing agents with top surface seal-coated. 
1.	Basis of Design: RetroPlus Roof Board. 
D.	High-Density Polyisocyanurate: ASTM C 1289, Type II, Class 4, Grade 1, High-density Polyisocyanurate technology bonded in-line to inorganic coated glass facers with greater than 80 lbs of compressive strength. 
1.	Basis of Design: ProtectoR HD.
a.	Thickness: 1/2 inch (13 mm).
b.	R-value: 2.5.
E.	Gypsum Board: ASTM C 1177, coated glass-mat facer, water-resistant gypsum substrate for mechanically attached roof applications.
1.	Basis of Design: Securock Ultralight Glass-Mat Roof Board.
2.	Basis of Design: DEXcell Glass Mat Roof Board.
3.	Basis of Design: Dens Deck Roof Board.
4.	Thickness: 1/4 inch (6 mm).
5.	Thickness: 1/2 inch (13 mm).
6.	Thickness: 5/8 inch (16 mm).
F.	Gypsum Board: ASTM C 1177, Heavy duty coated glass-mat facer; water-resistant gypsum substrate for adhered roof applications.
1.	Eonic primed face.
2.	Basis of Design: DEXcell FA Glass Mat Roof Board.
3.	Basis of Design: Dens Deck Prime Roof Board.
4.	Thickness: 1/4 inch (6 mm).
5.	Thickness: 1/2 inch (13 mm).
6.	Thickness: 5/8 inch (16 mm).
G.	Gypsum Fiber Board: ASTM C1278, non-faced, gypsum and cellulose fiber substrate.
1.	Basis of Design: Securock Gypsum-Fiber Roof Board.
2.	Thickness: 1/4 inch (6 mm).
3.	Thickness: 3/8 inch (9.5 mm).
4.	Thickness: 1/2 inch (13 mm).
5.	Thickness: 5/8 inch (16 mm).
2.6	ROOF INSULATION - Flute filler
A.	General: Preformed roof insulation boards that comply with requirements and referenced standards, selected from manufacturer's standard sizes and of thicknesses indicated.
B.	Polyisocyanurate Board Insulation: ASTM C 1289, Type II, Class 1, Grade 2, Product: ENRGY 3 
1.	Provide metal roof flute filler insulation package with thickness to fill flutes the height of the standing seam.
2.7	ROOF INSULATION
A.	General: Preformed roof insulation boards that comply with requirements and referenced standards, selected from manufacturer's standard sizes and of thicknesses indicated.
B.	Polyisocyanurate Board Insulation: ASTM C 1289,Type II:
1.	Basis of Design: ENRGY 3: 
a.	Class 1. 
b.	Grade 2 (20 psi).
2.	Basis of Design: ENRGY 3 25 PSI: 
a.	Class 1. 
b.	Grade 3 (25 psi).
3.	Basis of Design: ENRGY 3 CGF: 
a.	Class 2. 
b.	Grade 2 (20 psi).
4.	Basis of Design: ENRGY 3 25 PSI CGF: .
a.	Class 2. 
b.	Grade 3 (25 psi).
5.	Insulation Package: Minimum R Value: ________.
6.	Insulation Package: Minimum R Value: As required by applicable code. 
7.	Insulation Package: Minimum Thickness: ________.
8.	Insulation Package: Provide insulation in multiple layers.
9.	Minimum Long-Term Thermal Resistance (LTTR): 5.7 per inch.
a.	In accordance with CAN/ULC S770 at 75 degrees F (24 degrees C).
2.8	TAPERED INSULATION
A.	Tapered Insulation: ASTM C 1289, Type II: Factory-tapered insulation boards fabricated to slope of 1/4 inch per 12 inches (1:48), unless otherwise indicated. 
1.	Basis of Design: ENRGY 3.
a.	Class 1. 
b.	Grade 2 (20 psi).
2.	Basis of Design: ENRGY 3 25 PSI.
a.	Class 1. 
b.	Grade 3 (25 psi).
3.	Basis of Design: ENRGY 3 CGF.
a.	Class 2. 
b.	Grade 2 (20 psi).
4.	Basis of Design: ENRGY 3 25 PSI CGF.
a.	Class 2. 
b.	Grade 3 (25 psi).
2.9	INSULATION ACCESSORIES
A.	General: Roof insulation accessories recommended by insulation manufacturer for intended use and compatible with membrane roofing.
B.	Provide saddles, crickets, tapered edge strips, and other insulation shapes, where indicated for sloping to drain. Fabricate to slopes indicated. 
1.	Basis of Design: Tapered Fesco Edge Strip.
C.	Fasteners: Factory-coated steel fasteners and metal plates meeting corrosion-resistance provisions in FMG 4470, designed for fastening roof insulation to substrate, and furnished by roofing system manufacturer. 
1.	Basis of Design: UltraFast Fasteners and UltraFast Plates.
2.	Basis of Design: All Purpose Fasteners and UltraFast Plates.
3.	Basis of Design: Lite-Deck Fasteners and Plates.
D.	Polymer Fasteners: Glass-reinforced nylon fasteners with 1/4 inch square drive and 1 inch head with Galvalume-coated 3 inch metal stress plates, designed to lock into the fastener head. Fasteners designed for fastening roof insulation to substrate and furnished by roofing system manufacturer. 
1.	Basis of Design: Polymer Auger Fasteners and Plates 
E.	Urethane Adhesive: Manufacturer's two component polyurethane adhesive formulated to adhere insulation to substrate. 
1.	Basis of Design: JM Two-Part Urethane Insulation Adhesive (UIA).
2.	Basis of Design: JM One-Step Foamable Adhesive.
3.	Basis of Design: Roofing Systems Urethane Adhesive (RSUA).
4.	Basis of Design: JM Two-Part Urethane Insulation Adhesive Canister.
F.	Wood Nailer Strips: Comply with requirements in Division 06 Section "Miscellaneous Rough Carpentry."
2.10	VAPOR RETARDER
A.	Glass-Fiber Felts: ASTM D 2178, Type IV, asphalt-impregnated, glass-fiber felt. 
1.	Basis of Design: GlasPly IV.
B.	SBS Vapor Retarder: SBS-modified asphalt sheet; smooth surfaced; suitable for application method specified. 
1.	ASTM D6163, Grade S, Type I, glass-fiber-reinforced.
a.	Basis of Design: DynaWeld Base.
b.	Basis of Design: DynaBase HW.
c.	Basis of Design: DynaBase
2.	ASTM D6164, Grade S, Type I, polyester-reinforced. 
a.	Basis of Design: DynaLastic 180 S
C.	Self-Adhered SBS Vapor Retarder: ASTM D 6163, Grade S, Type I, glass-fiber-reinforced, SBS-modified asphalt sheet; sand surfaced; suitable for application method specified. 
1.	Basis of Design: DynaGrip Base SD/SA.
D.	Asphalt Primer: ASTM D41. 
1.	Basis of Design: JM Asphalt Primer
E.	Self-Adhered SBS Vapor Retarder: Tri-laminate woven polyethylene, nonslip UV protected top surface; suitable for application method specified.
1.	Basis of Design: JM Vapor Barrier SA
2.	Basis of Design: JM Vapor Barrier SAR. 
F.	Self-Adhered Primer: One-part penetrating primer solution to enhance the adhesion of self-adhering membranes. 
1.	Basis of Design: SA Primer.
2.	Basis of Design: SA Primer Low VOC
3.	Basis of Design: JM All Season Sprayable Bonding Adhesive.
G.	Polyethylene Vapor Retarder: ASTM D 4397,with maximum permeance rating of 0.13 perm (7.5 ng/Pa x s x sq. m).
1.	Thickness: 6 mils (0.15 mm), minimum.
2.	Thickness: 10 mils (0.25 mm), minimum.
2.11	BASE-SHEET MATERIALS
A.	Base Sheet: ASTM D 4601, Type II non-perforated, asphalt-impregnated and -coated, glass-fiber sheet, dusted with fine mineral surfacing on both sides. 
1.	Basis of Design: PermaPly 28.
2.	Basis of Design: GlasBase Plus.
B.	Base Sheet: ASTM D 4897, Type II, venting, non-perforated, heavyweight, asphalt-impregnated and -coated, glass-fiber base sheet with coarse granular surfacing or embossed venting channels on bottom surface. 
1.	Basis of Design: Ventsulation Felt
C.	Base-Sheet Fasteners: Twin legged factory-coated steel fasteners and Galvalume metal plates meeting corrosion-resistance provisions in FMG 4470, designed for fastening base-sheet to substrate, tested by manufacturer for required pullout strength, and provided by the roofing system manufacturer. 
1.	Product: Lightweight Concrete (LWC) Base Sheet Fasteners
D.	Base-Sheet Fasteners: Tube, disk and locking staple design, factory-coated steel fasteners and Galvalume metal battens meeting corrosion-resistance provisions in FMG 4470, designed for fastening base-sheet to substrate, tested by manufacturer for required pullout strength, and provided by the roofing system manufacturer. Product: UltraLok Locking Impact Fastener
E.	Base Sheet Fasteners: 32 gauge, 1-5/8 inch diameter tin caps with 11-gauge annular ring shank nails.
2.12	SUBSTRATE BOARD
A.	Gypsum Board: ASTM C 1177, coated glass-mat facer, water-resistant gypsum substrate for mechanically attached roof applications.
1.	Basis of Design: Securock Ultralight Glass-Mat Roof Board
2.	Basis of Design: DEXcell Glass Mat Roof Board
3.	Basis of Design: Dens Deck Roof Board
4.	Thickness: 1/4 inch (6 mm).
5.	Thickness: 1/2 inch (13 mm).
6.	Thickness: 5/8 inch (16 mm).
B.	Gypsum Board: ASTM C 1177, Heavy duty coated glass-mat facer, water-resistant gypsum substrate for adhered roof applications.
1.	Basis of Design: DEXcell FA Glass Mat Roof Board
2.	Basis of Design: Dens Deck Prime Roof Board
3.	Thickness: 1/4 inch (6 mm).
4.	Thickness: 1/2 inch (13 mm).
5.	Thickness: 5/8 inch (16 mm).
C.	Gypsum Fiber Board: ASTM C 1278, non-faced, gypsum and cellulose fiber substrate.
1.	Basis of Design: Securock Gypsum-Fiber Roof Board
2.	Thickness: 1/4 inch (6 mm).
3.	Thickness: 3/8 inch (9.5 mm).
4.	Thickness: 1/2 inch (13 mm).
5.	Thickness: 5/8 inch (16 mm).
D.	High-Density Polyisocyanurate: ASTM C 1289, Type II, Class 4, Grade 1, High-density Polyisocyanurate technology bonded in-line to inorganic coated glass facers with greater than 80 lbs of compressive strength. 
1.	Basis of Design: ProtectoR HD
a.	Thickness: 1/2 inch (13 mm)
b.	R-value: 2.5
2.13	EDGE METAL COMPONENTS
A.	Expansion Joints: Provide factory fabricated weatherproof, exterior covers for expansion joint openings consisting of flexible rubber membrane, supported by a closed cell foam to form flexible bellows, with two metal flanges, adhesively and mechanically combined to the bellows by a bifurcation process. Provide product from single-source roofing system supplier that is included in the No Dollar Limit guarantee. 
1.	Basis of Design: Expand-O-Flash.
2.	Basis of Design: Expand-O-Gard. 
B.	Coping System: Manufacturer's factory fabricated coping consisting of a base piece and a snap-on cap. Provide product from single-source roofing system supplier that is included in the No Dollar Limit guarantee. 
1.	Basis of Design: Presto-Lock Coping.
2.	Basis of Design: Presto-Lock Gold Coping.
C.	Fascia System: Manufacturer's factory fabricated fascia consisting of a base piece and a snap-on cover. Provide product from single-source roofing system supplier that is included in the No Dollar Limit guarantee. 
1.	Basis of Design: Presto-Tite Fascia.
2.	Basis of Design: Presto-Tite Edge One Fascia.
D.	Metal Edge System: Manufacturer's factory fabricated metal edge system used to terminate the roof at the perimeter of the structure. Provide product from single-source roofing system supplier that is included in the No Dollar Limit guarantee. 
1.	Basis of Design: Presto-Weld Drip Edge.
2.	Basis of Design: JM PVC-Coated Metal.
E.	Shop-Fabricated Edge Metal: ANSI/SPRI ES-1 compliant custom-fabricated edge metal. Minimum requirements:
1.	Steel: 24 gauge (0.607 mm), TPO coated fastened 6 inches (152.4 mm) on center.
2.	Aluminum: 0.05 inch (1.27 mm) thick, fastened 6 inches (152.4 mm) on center.
F.	Metal Flashing Sheet: Metal flashing sheet is specified in Division 07 Section "Sheet Metal Flashing and Trim."
G.	Roof Edge Drainage Systems: Gutter Systems: Manufactured in section lengths not exceeding 12 feet (3.658 m) with 0.100-inch (2.54 mm) mill aluminum internal Gutter Hangers, 24 inches (609.6 mm) on center, and 2-inch (50.8 mm) wide formed external wind straps 6 feet (1.829 m) on center.
PART 3    EXECUTION
3.1	EXAMINATION
A.	Examine substrates, areas, and conditions for compliance with the requirements affecting performance of roofing system.
1.	General:
a.	Verify that roof openings and penetrations are in place and set and braced and that roof drains are securely clamped in place.
b.	Verify that wood cants, blocking, curbs, and nailers are securely anchored to roof deck at penetrations and terminations and that nailers match thicknesses of insulation.
2.	Steel Decks:
a.	Verify that surface plane flatness and fastening of steel roof deck complies with requirements in Division 05 Section "Steel Decking."
b.	Verify that decking is visibly dry and free of moisture. 
c.	Verify that the decking is smooth and free of large cracks, holes, or sharp changes in elevation of the surface.
d.	When applicable perform pull test with the specific fastener being used on the project to confirm the fastener resistance meets the requirements for that particular system.
3.	Existing Standing Seam and Light Gauge Decks:
a.	Verify decking is visibly dry and free of moisture. 
b.	Verify decking is smooth and free of large cracks, holes, or sharp changes in elevation of the surface.
c.	When applicable, perform pull test with specific fastener being used on project to confirm fastener resistance meets requirements for that particular system.
1)	Provide documentation of pull-out resistance values in accordance with ANSI/SPRI FX-1 2016.
4.	Concrete Decks:
a.	Verify that concrete curing compounds that will impair adhesion of roofing components to roof deck have been removed.
b.	Verify that concrete substrate is visibly dry and free of moisture. 
5.	Wood Decks:
a.	Verify that wood decking is visibly dry and free of moisture.
b.	Verify that wood has ability to provide minimum fastener pull-out resistance.
1)	Provide documentation of pull-out resistance values in accordance with ANSI/SPRI FX-1 2016.
6.	Cementitious Wood Fiber Decks (Tectum):
a.	Verify that cementitious wood fiber substrate is visibly dry and free of moisture.
b.	Verify that cementitious wood fiber has ability to provide minimum base sheet fastener pull-out resistance.
1)	Provide documentation of pull-out resistance values in accordance with ANSI/SPRI FX-1 2016.
c.	Provide documentation of adhesion resistance values in accordance with ANSI/SPRI 1A-1 2015.
7.	Lightweight Insulating Concrete:
a.	Verify that lightweight insulating concrete substrate is visibly dry and free of moisture according to the lightweight insulating concrete manufacturer's approved method.
b.	Verify that lightweight insulating concrete has ability to provide minimum base sheet fastener pull-out resistance.
c.	Provide documentation of adhesion resistance values in accordance with ANSI/SPRI 1A-1 2015.
8.	Gypsum Deck:
a.	Verify that gypsum is visibly dry, free of moisture, and that there are no signs of staining.
b.	Inspect deck for cracking and deflection of bulb tees. 
c.	Verify that gypsum has ability to provide minimum fastener pull-out resistance. 
1)	Provide documentation of pull-out resistance values in accordance with ANSI/SPRI FX-1 2016.
d.	Provide documentation of adhesion resistance values in accordance with ANSI/SPRI 1A-1 2015.
9.	Ensure general rigidity and proper slope for drainage.
10.	Verify that deck is securely fastened with no projecting fasteners and with no adjacent units in excess of 1/16 inch (1.6 mm) out of plane relative to adjoining deck.
B.	Unacceptable panels should be brought to the attention of the General Contractor and Project Owner's Representative and shall be corrected prior to installation of roofing system.
C.	Proceed with installation only after unsatisfactory conditions have been corrected.
3.2	PREPARATION
A.	Clean and remove from substrate sharp projections, dust, debris, moisture, and other substances detrimental to roofing installation in accordance with roofing system manufacturer's written instructions.
B.	Prevent materials from entering and clogging roof drains and conductors and from spilling or migrating onto surfaces of other construction. 
C.	If applicable, prime surface of deck with primer at a rate recommended by roofing manufacturer and allow primer to dry.
D.	Proceed with each step of installation only after unsatisfactory conditions have been corrected.
3.3	RE-ROOF PREPARATION
A.	Remove all roofing membrane, surfacing, coverboards, insulation, fasteners, asphalt, pitch, adhesives, etc.
1.	Remove an area no larger than can be re-roofed in one day.
B.	Tear out all base flashings, counterflashings, pitch pans, pipe flashings, vents, sumps and like components necessary for application of new membrane.
C.	Remove abandoned equipment curbs, skylights, smoke hatches, and penetrations.
1.	Install decking to match existing as directed by Owner's Representative.
D.	Raise (disconnect by licensed craftsmen, if necessary) all HVAC units and other equipment supported by curbs to conform with the following: 
1.	Modify curbs as required to provide a minimum 8" base flashing height measured from the surface of the new membrane to the top of the flashing membrane.
2.	Secure of flashing and install new metal counterflashing prior to re-installation of unit.
3.	Perimeter nailers shall be elevated to match elevation of new roof insulation.
E.	Immediately remove all debris from roof surface. Demolished roof system may not be stored on the roof surface.
3.4	RE-COVER PREPARATION
A.	Prepare existing roof according to roofing system manufacturer's written instructions, applicable recommendations of the roofing manufacturer, and requirements in this Section.
B.	Tear out all base flashings, counterflashings, pitch pans, pipe flashings, vents, sumps and like components necessary for application of new membrane.
C.	Disable existing roof membrane per manufacturer's written instruction.
D.	Remove existing membrane per manufacturer's written instructions.
E.	Remove and replace wet, deteriorated, or damaged roof insulation and decking as identified in moisture survey.
F.	Remove abandoned equipment curbs, skylights, smoke hatches, and penetrations. Install decking to match existing as directed by Owner's Representative.
G.	Raise, (disconnect by licensed craftsmen, if necessary) all HVAC units and other equipment supported by curbs to conform with the following: 
1.	Modify curbs as required to provide a minimum 8-inch base flashing height measured from the surface of the new membrane to the top of the flashing membrane.
2.	Secure top of flashing and install new metal counterflashing prior to re-installation of unit.
3.	Perimeter nailers shall be elevated to match elevation of new roof insulation.
H.	Immediately remove all debris from roof surface. Demolished roof system may not be stored on the roof surface.
I.	Install polyester slip sheet as a loosely laid single layer beneath single ply membrane, side and end lapping each sheet a minimum of 3 inches (76.2 mm) and 6 inches (150 mm), respectively. Sheet may be tacked into place as deemed necessary. 
3.5	SUBSTRATE BOARD INSTALLATION
A.	Install substrate board with long joints in continuous straight lines, perpendicular to roof slopes with end joints staggered between rows. Tightly butt substrate boards together.
B.	Mechanically Fastened Substrate Board: Install substrate board and secure to deck using mechanical fasteners designed and sized for fastening specified substrate board to deck type.
1.	Fasten substrate board to top flanges of steel deck to resist uplift pressure at corners, perimeter, and field of roof per roofing system manufacturer's written instructions.
2.	Fasten substrate board to top flanges of wood deck to resist uplift pressure at corners, perimeter, and field of roof per roofing system manufacturer's written instructions.
C.	Loose Laid Substrate Board: Loose lay substrate board, staggering joints with insulation board substrate.
D.	Adhered Substrate Board: Adhere substrate board to substrate as follows:
1.	Install in two-part urethane adhesive according to roofing system manufacturer's instruction.
2.	Install to resist uplift pressure at corners, perimeter, and roof field.
3.6	BASE-SHEET INSTALLATION
A.	Install one lapped base sheet course and mechanically fasten to substrate according to roofing system manufacturer's written instructions.
1.	Enhance fastening rate in perimeter and corner zones according to code requirements, wind uplift system approvals or manufacturer's guarantee requirements, whichever is more stringent.
B.	Comply with roofing system manufacturer's written instructions for installing roof insulation.
3.7	VAPOR-RETARDER INSTALLATION
A.	Install polyethylene-sheet vapor retarder as a loosely laid single layer over area to receive vapor retarder, side and end lapping each sheet a minimum of 2 inches (50 mm) and 6 inches (150 mm), respectively.
1.	Seal side and end laps.
B.	Install 2 glass-fiber felt plies lapping each sheet 19 inches (483 mm) over preceding sheet. Embed each sheet in a solid mopping of hot roofing asphalt per manufacturer's written instructions. 
C.	Install modified bituminous vapor retarder sheet according to roofing manufacturer's written instructions, starting at low point of roofing system. Extend roofing membrane sheets over and terminate beyond cants, installing as follows:
1.	Unroll roofing membrane sheets and allow them to relax for minimum time period required by manufacturer.
2.	Heat weld vapor retarder to substrate according to roofing system manufacturer's written instructions.
3.	Adhere vapor retarder in a full mopping of hot asphalt to substrate according to roofing system manufacturer's written instructions.
4.	Self-adhere vapor retarder to substrate according to roofing system manufacturer's instructions.
D.	Laps: Accurately align roofing membrane sheets, without stretching, and maintain uniform side and end laps. Stagger end laps. Completely bond and seal laps, leaving no voids.
1.	Repair tears and voids in laps and lapped seams not completely sealed.
E.	Completely seal vapor retarder at terminations, obstructions, and penetrations to prevent air movement into membrane roofing system.
3.8	FLUTE FILLER INSULATION INSTALLATION
A.	Coordinate installation of roof system components so insulation is not exposed to precipitation or left exposed at the end of the workday.
B.	Comply with roofing system manufacturer's written instructions for installing roof insulation. 
C.	Loose lay Polyisocyanurate flute filler insulation between the metal roof standing seams. 
3.9	INSULATION INSTALLATION
A.	Coordinate installation of roof system components so insulation and cover board are not exposed to precipitation or left exposed at the end of the workday.
B.	Comply with roofing system manufacturer's written instructions for installation of roof insulation and cover board.
C.	Install tapered insulation under area of roofing to conform to slopes indicated.
D.	Install insulation boards with long joints in a continuous straight line. Joints should be staggered between rows, abutting edges and ends per manufacturer's written instructions. Fill gaps exceeding 1/4 inch (6 mm) with like material.
E.	Install 2 or more layers with joints of each succeeding layer staggered from joints of previous layer a minimum of 6 inches (150 mm) in each direction.
F.	Trim surface of insulation boards where necessary at roof drains so completed surface is flush and does not restrict flow of water.
G.	Install tapered edge strips at perimeter edges of roof that do not terminate at vertical surfaces.
H.	Preliminarily Fastened Insulation for Mechanically Fastened Membrane Systems: Install insulation with fasteners at rate required by roofing system manufacturer or applicable authority, whichever is more stringent.
1.	Fasten top layer to resist uplift pressure at corners, perimeter, and field of roof.
I.	Adhered Insulation: Adhere each layer of insulation to substrate as follows:
1.	Install each layer in a two-part urethane adhesive according to roofing system manufacturer's instruction.
2.	Install each layer in a solid mopping of hot roofing asphalt according to roofing system manufacturer's instruction.
3.	Install each layer to resist uplift pressure at corners, perimeter, and field of roof.
J.	Loose Laid Insulation with Top Insulation Layer Mechanically Fastened: Loose lay insulation with staggered joints and secure top layer of insulation to deck using mechanical fasteners designed and sized for fastening specified board-type to deck type. 
1.	Fasten top layer to resist uplift pressure at corners, perimeter, and field of roof.
K.	Loose Laid Insulation: Loose lay all layers of insulation with staggered joints. 
L.	Mechanically Fastened with Subsequent Layers Adhered Insulation: Secure first layer of insulation to deck using mechanical fasteners designed and sized for fastening specified board-type to deck type. 
1.	Fasten first layer to resist uplift pressure at corners, perimeter, and field of roof.
2.	Install subsequent layers in a two-part urethane adhesive according to roofing system manufacturer's instruction.
3.	Install subsequent layers in a hot roofing asphalt according to roofing system manufacturer's instructions. 
4.	Install each layer to resist uplift pressure at corners, perimeter, and field of roof.
3.10	COVER BOARD INSTALLATION
A.	Coordinate installing membrane roofing system components so cover board is not exposed to precipitation or left exposed at the end of the workday.
B.	Comply with membrane roofing system manufacturer's written instructions for installing roof cover board.
C.	Install cover board with long joints in a continuous straight line. Joints should be staggered between rows, abutting edges and ends per manufacturer's written instructions. Fill gaps exceeding 1/4 inch (6 mm) with cover board.
1.	Cut and fit cover board within 1/4 inch (6 mm) of nailers, projections, and penetrations.
D.	Trim surface of cover board where necessary at roof drains so completed surface is flush and does not restrict flow of water.
1.	Install tapered edge strips at perimeter edges of roof that do not terminate at vertical surfaces.
E.	Preliminarily Fastened Insulation for Mechanically Fastened Membrane Systems: Install insulation with fasteners at rate required by roofing system manufacturer or applicable authority, whichever is more stringent.
1.	Fasten top layer to resist uplift pressure at corners, perimeter, and field of roof.
F.	Adhered Cover Board: Adhere cover board to substrate as follows:
1.	Install in a two-part urethane adhesive according to roofing system manufacturer's instruction.
2.	Install to resist uplift pressure at corners, perimeter, and field of roof.
G.	Mechanically Fastened Cover Board: Install cover board and secure to deck using mechanical fasteners designed and sized for fastening specified cover board to deck type.
1.	Fasten to resist uplift pressure at corners, perimeter, and field of roof.
3.11	ROOFING MEMBRANE INSTALLATION, GENERAL
A.	Install roofing membrane in accordance with roofing system manufacturer's written instructions, applicable recommendations of the roofing manufacturer and requirements in this Section.
B.	Cooperate with testing and inspecting agencies engaged or required to perform services for installing roofing system.
C.	Coordinate installing roofing system so insulation and other components of the roofing membrane system not permanently exposed are not subjected to precipitation or left uncovered at the end of the workday or when rain is imminent.
1.	Provide tie-offs at end of each day's work to cover exposed roofing membrane sheets and insulation.
2.	Complete terminations and base flashings and provide temporary seals to prevent water from entering completed sections of roofing system.
3.	Remove and discard temporary seals before beginning work on adjoining roofing.
D.	Asphalt Heating: Heat roofing asphalt to temperature recommended by roofing manufacturer to flux modified membrane. Do not exceed roofing asphalt manufacturer's recommended temperature limits during roofing asphalt heating. Discard roofing asphalt maintained at a temperature exceeding finished blowing temperature for more than 4 hours.
1.	Substrate-Joint Penetrations: Prevent roofing asphalt from penetrating substrate joints, entering building, or damaging roofing system components or adjacent building construction.
3.12	ADHERED ROOFING MEMBRANE INSTALLATION
A.	Install roofing membrane over area to receive roofing in accordance with membrane roofing system manufacturer's written instructions. 
1.	Unroll roofing membrane and allow to relax before installing.
B.	Accurately align roofing membrane, maintain uniform side, and end laps of minimum dimensions required by manufacturer. Stagger end laps.
C.	Solvent Based Bonding Adhesive for smooth backed membranes: Apply solvent-based bonding adhesive to substrate and underside of roofing membrane at rate required by manufacturer and allow to partially dry before installing roofing membrane. Do not apply bonding adhesive to splice area of roofing membrane.
D.	Water Based Bonding Adhesive for smooth backed membranes: Apply water-based bonding adhesive to substrate at rate required by manufacturer and immediately install roofing membrane. Do not apply bonding adhesive to splice area of roofing membrane.
E.	Bonding Adhesive for fleece backed membranes: Apply water-based bonding adhesive to substrate at rate required by manufacturer and immediately install roofing membrane. Do not apply bonding adhesive to splice area of roofing membrane.
F.	Urethane Membrane Adhesive for fleece backed membranes: Apply Urethane Adhesive to substrate at rate required by manufacturer and install fleece-backed roofing membrane. Do not apply bonding adhesive to splice area of roofing membrane.
G.	Mechanically fasten roofing membrane securely at terminations, penetrations, and perimeter of roofing.
H.	Apply roofing membrane with side laps shingled with roof slope, where possible.
I.	Seams: Clean seam areas, overlap roofing membrane, and hot-air weld side and end laps of roofing membrane according to manufacturer's written instructions to ensure a watertight seam installation.
1.	Test lap edges with probe to verify seam weld continuity. Apply lap sealant to seal cut edges of roofing membrane.
2.	Verify field strength of seams a minimum of twice daily and repair seam sample areas. 
a.	Remove and repair any unsatisfactory sections before proceeding with installation.
3.	Repair tears, voids, and incorrectly lapped seams in roofing membrane that do not meet requirements.
J.	Spread sealant or mastic bead over deck drain flange at deck drains and securely seal roofing membrane in place with clamping ring.
K.	Install roofing membrane and auxiliary materials to tie into existing roofing.
3.13	MECHANICALLY FASTENED ROOFING MEMBRANE INSTALLATION
A.	Install roofing membrane over area to receive roofing in accordance with roofing system manufacturer's written instructions. 
1.	Unroll roofing membrane and allow it to relax before installing.
2.	Install sheet in accordance with roofing system manufacturer's written instructions.
B.	Accurately align roofing membranes, maintain uniform side, and end laps of minimum dimensions required by manufacturer. Stagger end laps.
C.	Mechanically fasten roofing membrane securely at terminations, penetrations, and perimeter of roofing.
D.	Always install membrane laps perpendicular to the steel deck flutes. "Picture Frame" installation method is not permitted.
E.	Apply roofing membrane with side laps shingled with roof slope, where possible.
F.	Seams: Clean seam areas, overlap roofing membrane, and hot-air weld side and end laps of roofing membrane according to manufacturer's written instructions to ensure a watertight seam installation.
1.	Test lap edges with probe to verify seam weld continuity. Apply lap sealant to seal cut edges of roofing membrane.
2.	Verify field strength of seams a minimum of twice daily and repair seam sample areas. 
a.	Remove and repair any unsatisfactory sections before proceeding with work.
3.	Repair tears, voids, and lapped seams in roofing membrane that do not meet requirements.
G.	Spread sealant or mastic bead over deck drain flange at deck drains and securely seal roofing membrane in place with clamping ring.
H.	In-Splice Attachment: Secure one edge of roofing membrane using fastening plates or metal battens centered within membrane splice and mechanically fasten roofing membrane to roof deck. Field-splice seam.
3.14	INDUCTION WELDED ROOFING MEMBRANE INSTALLATION
A.	Install roofing membrane over area to receive roofing according to roofing system manufacturer's written instructions. Unroll roofing membrane and allow to relax before installing.
B.	Accurately align roofing membranes and maintain uniform side and end laps of minimum dimensions required by manufacturer. Stagger end laps.
C.	Always install membrane laps perpendicular to the steel deck flutes. "Picture Frame" installation method is not permitted.
D.	Apply roofing membrane with side laps shingled with roof slope, where possible.
E.	Seams: Clean seam areas, overlap roofing membrane, and hot-air weld side and end laps of roofing membrane per manufacturer's written instructions to ensure a watertight seam installation.
1.	Test lap edges with probe to verify seam weld continuity. Apply lap sealant to seal cut edges of roofing membrane.
2.	Verify field strength of seams a minimum of twice daily and repair seam sample areas. 
a.	Remove and repair any unsatisfactory sections before proceeding with work.
3.	Repair tears, voids, and lapped seams in roofing membrane that do not meet requirements.
F.	Spread sealant or mastic bead over deck drain flange at deck drains and securely seal roofing membrane in place with clamping ring.
G.	Induction Welding Installation:
1.	Perform calibration and set-up as detailed by the Induction Welder Owner's Manual
2.	Center the Induction Welder over the first plate in pattern and activate the weld.
a.	Induction Welder shall be centered over the plate to create a 100% bond.
b.	If an error occurs during activation, refer to the induction welder owner's manual for corrective action.
3.	Prior to every use, clean face of Heat Sink Magnet.
4.	Place Heat Sink Magnet over the welded plate.
a.	Keep Heat Sink Magnet in place at least 45 seconds while the assembly cools.
5.	Repeat process for each plate.
3.15	BASE FLASHING INSTALLATION
A.	Install sheet flashings and preformed flashing accessories and adhere to substrates according to membrane roofing system manufacturer's written instructions.
B.	Apply solvent-based bonding adhesive at required rate and allow to partially dry. Do not apply bonding adhesive to seam area of flashing.
C.	Apply water-based bonding adhesive in two-sided application, at required rate, and allow to partially dry. Do not apply bonding adhesive to seam area of flashing.
D.	Apply single ply liquid applied flashing system per manufacturer's written instructions. 
E.	Flash penetrations and field-formed inside and outside corners per manufacturer's installation instructions.
F.	Clean seam areas and overlap and firmly roll sheet flashings into the adhesive. Weld side and end laps to ensure a watertight seam installation.
G.	Terminate and seal top of sheet flashings and mechanically anchor to substrate through termination bars.
3.16	EDGE METAL INSTALLATION
A.	Examine substrates and conditions under which sheet metal flashing and trim are to be installed and verify that work may properly commence. Do not proceed with installation until unsatisfactory conditions have been corrected. 
B.	Provide edge details as indicated on the Drawings. Install in accordance with the membrane manufacturer's requirements and SMACNA's "Architectural Sheet Metal Manual."
C.	Join individual sections in accordance with the membrane manufacturer's requirements and SMACNA's "Architectural Sheet Metal Manual."
3.17	WALKWAY INSTALLATION
A.	Flexible Walkways: Install walkway products in locations indicated. Heat weld and adhere walkway products to substrate according to roofing system manufacturer's written instructions. 
B.	Roof-Paver Walkways: Install walkway roof pavers with applicable slip sheet according to manufacturer's written instructions in locations indicated, to form walkways.
3.18	FIELD QUALITY CONTROL
A.	Owner or designated representative will provide on-site observation and inspection during installation.
B.	Owner will engage a qualified testing agency to perform tests and inspections.
C.	Final Roof Inspection: Arrange for roofing system manufacturer's technical representative to inspect roofing installation on completion and submit report to Architect.
D.	Repair or remove and replace components of roofing system where test results or inspections indicate that they do not comply with specified requirements.
E.	Additional testing and inspecting, at Contractor's expense, will be performed to determine compliance of replaced or additional work with specified requirements.
3.19	PROTECTION AND CLEANING
A.	Protect roofing system from damage and wear during remainder of construction period.
B.	Correct deficiencies in or remove roofing system that does not comply with requirements, repair substrates, and repair or reinstall roofing system to a condition free of damage and deterioration at time of Substantial Completion and according to warranty requirements.
C.	Clean overspray and spillage from adjacent construction using cleaning agents and procedures recommended by manufacturer of affected construction.

END OF SECTION 075419