07531,_revised.pdf

USDA/NPGQC

Maintenance Shop & Industrial Facility

Rev DC – Amendment 1Issued for Bid

07531 - 1 TPO Single Ply Roofing –

Fully Adhered

SECTION 07531

TPO SINGLE PLY ROOFING – FULLY ADHERED

PART 1 GENERAL

1.1 SUMMARY

A. Section includes vapor retarder; insulation; and membrane roofing, base flashings

TPO roofing membrane expansion joints and counter flashings for the Vestibule

Roof that connects the new Maintenance Shop and Industrial Facility to the existing building.

1.2 REFERENCES

A. ASTM International:

1. ASTM C 79/C 79M – Standard Specification for Gypsum Sheathing

Board.

2. ASTM C 1289 – Standard Specification for Faced Rigid Cellular

Polyisocyanurate Thermal Insulation Board.

3. ASTM C 208 - Standard Specification for Cellulosic Fiber Insulating

Board.

4. ASTM C 578 - Standard Specification for Rigid, Cellular Polystyrene

Thermal Insulation.

5. ASTM D 41 - Standard Specification for Asphalt Primer Used in Roofing, Damp proofing, and Waterproofing.

6. ASTM D 312 - Standard Specification for Asphalt Used in Roofing.

7. ASTM D 1079 - Standard Terminology Relating to Roofing, Waterproofing, and Bituminous Materials.

8. ASTM D 4263 - Standard Test Method for Indicating Moisture in

Concrete by the Plastic Sheet Method.

1. ASTM D 6878 Standard Specification for Thermoplastic Polyolefin Based

Sheet Roofing

B. FM Global:

1. FM 4470 - Approval Standard for Class 1 Roof Coverings.

C. National Roofing Contractors Association:

1. NRCA - The NRCA Roofing and Waterproofing Manual.

D. Underwriters Laboratories Inc.:

1. UL 790 - Tests for Fire Resistance of Roof Covering Materials.

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1.3 SYSTEM DESCRIPTION

A. Thermoplastic Single –ply Roofing System: One ply membrane system with vapor retarder, insulation, and adhesive applied membrane.

1.4 PERFORMANCE REQUIREMENTS

A. Conform to International Building Code for roof assembly fire hazard requirements.

B. Provide an installed roofing membrane and base flashing system that does not permit the passage of water, and will withstand the design pressures calculated in accordance with the most current revision of ASCE 7.

C. UL 790: Class A Fire Hazard Classification.

D. FM 4470: Roof Assembly Classification, of Class 1 Construction, wind uplift requirement of 1-60, in accordance with FM Construction Bulletin 1-28.

1.5 SUBMITTALS

A. Section 01330 - Submittal Procedures: Submittal procedures.

B. Shop Drawings: Indicate setting plan for tapered insulation, joint and termination detail conditions, conditions of interface with other materials. Indicate membrane layout and seam locations.

C. Product Data: Submit characteristics on membrane materials, adhesives, seaming materials, flashing materials, insulation, and vapor retarders.

D. Manufacturer's Installation Instructions: Submit special precautions required for seaming membrane.

E. Manufacturer's Certificate: Certify products meet or exceed specified requirements.

F. Manufacturer's Field Reports: Indicate procedures followed; ambient temperatures, humidity and wind velocity during application.

1.6 QUALITY ASSURANCE

A. Perform work in accordance with NRCA Roofing and Waterproofing Manual.

1.7 QUALIFICATIONS

A. Manufacturer: Company specializing in manufacturing products specified in this section with minimum three years documented experience.

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B. Applicator: Company specializing in performing work of this Section with minimum three years documented experience and approved by manufacturer.

C. Source Limitations: Components listed shall be provided by a single manufacturer or approved by the primary roofing manufacturer.

D. Final Inspection: Manufacturer's representative shall provide a comprehensive final inspection after completion of the roof system. All application errors shall be addressed and final punch list completed.

1.8 PRE-INSTALLATION MEETINGS

A. Section 01300 - Administrative Requirements: Preinstallation meetings.

B. Convene minimum one week prior to commencing Work of this section.

C. Review preparation and installation procedures and coordinating and scheduling required with related Work.

1.9 DELIVERY, STORAGE, AND HANDLING

A. Section 01600 - Product Requirements: Requirements for transporting, handling, storing, and protecting products.

B. Deliver products in manufacturer’s original containers, dry, undamaged, with seals and labels intact.

C. Store products in weather protected environment, clear of ground and moisture.

D. Protect foam insulation from direct exposure to sunlight.

E. Remove manufacturer supplied plastic covers from materials provided with such.

Use "breathable" type covers such as canvas tarpaulins to allow venting and protection from weather and moisture. Cover and protect materials at the end of each work day. Do not remove any protective tarpaulins until immediately before the material will be installed.

F. Materials shall be stored above 55 degrees F a minimum of 24 hours prior to application.

G. Store and dispose of solvent-based materials, and materials used with solvent-based materials, in accordance with requirements of local authorities having jurisdiction.

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1.10 ENVIRONMENTAL REQUIREMENTS

A. Section 01600 - Product Requirements: Environmental conditions affecting products on site.

B. Do not apply roofing membrane during inclement weather or ambient temperatures below or above recommended temperatures as recommended by roofing manufacturer without proper weather protection.

C. Do not apply roofing membrane to damp or frozen deck surface or when precipitation is expected or occurring.

D. Do not expose materials vulnerable to water or sun damage in quantities greater than can be weatherproofed during same day.

1.11 COORDINATION

A. Section 01300 - Administrative Requirements: Coordination and project conditions.

B. Coordinate Work with installation of associated roof penetrations and metal flashings, as Work of this section proceeds.

1.12 WARRANTY

A. Section 01700 - Execution Requirements: Requirements for warranties.

B. Furnish 20 year manufacturer's warranty including coverage of materials and installation and resulting damage to building resulting from failure to resist penetration of moisture.

PART 2 PRODUCTS

2.1 TPO SINGLE PLY ROOFING - FULLY ADHERED

A. Manufacturers: Subject to compliance with specified requirements provide one of the following:

1. Carlisle SynTec Systems.

2. Celotex Corporation.

3. Firestone Building Products Co.

4. GenFlex Roofing Systems.

5. Dow Roofing Systems/Stevens Roofing Systems.

5.6. GAF

6.7. Substitutions: Section 01600 - Product Requirements.

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B. The Basis of Design is Firestone Building Products – Firestone UltraPly TPO

Roofing Systems Fully Adhered, with ISO 2000 insulation.

2.2 COMPONENTS

A. Membrane: A smooth type, polyester scrim reinforced thermoplastic polyolefin membrane with a nominal 0.045 inch thickness, white color, for use as a single ply roofing membrane. Meets or exceeds the minimum requirements of ASTM

D-6878. Each full roll contains approximately 1000 sf of roofing material, 10 feet by 100 feet weighing 256 lb EverGuard TPO 45 mil thermoplastic single-ply roofing membrane.

B. Seaming Materials: As recommended by membrane manufacturer.

C. Adhesive Materials:

1. Membrane Adhesives: As recommended by membrane manufacturer.

2. Insulation Adhesive: As recommended by insulation manufacturer.

3. Thinner and Cleaner: As recommended by adhesive manufacturer, compatible with sheet membrane.

D. Cover Board: ASTM C79/C79M; Underlayment board with a water-resistant and silicone treated gypsum core with glass fiber facers embedded on both sides, and pre-primed on one side. GP Dens-Deck Prime Roof Board.

1. Board Thickness: 1/2 inch.

E. Sheet Vapor Retarder: Fire resistant, conforming to UL requirements; plastic sheet; including compatible fire retarder adhesive.

F. Insulation: ASTM C1289, Type II, Class I, faced rigid cellular polyisocyanurate roof insulation, with the following characteristics:

1. Board Size: 48 x 96 inch.

2. Board Thickness: Minimum 6 inches thick.

3. Board Edges: Square.

4. Thermal Conductivity: LTTR value of 6.0 per inch.

5. Compressive Strength: Minimum 20 psi.

6. Insulation laminated to heavy black non-asphaltic, fiber-reinforced felt facer.

7. Insulation shall be HCFC Free.

G. Flexible Flashings: Same material as membrane.

H. Counterflashings: Metal, 25 gauge steel with 0.020 inch thick TPO based film.

Factory supplied in sheets and required for fabrication into metal gravel stop and drip edge profiles, metal base and curb flashings, sealant pans, and scupper sleeves. Sheet size 4 feet by 10 feet sheet weight 47 lb, 07531 - 6 TPO Single Ply Roofing –

I. Prefabricated Roof Specialties: As specified in Section 07710, Manufactured

Roof Specialties.

2.3 ACCESSORIES

A. Wood: Specified in Section 06114, Wood Blocking and Curbing, pressure preservative treated.

B. Tapered Edge Strip: Factory fabricated rigid perlite strip cut at angles to provide a smooth transition between differences in elevation.

C. Insulation Fasteners: Appropriate for purpose intended and approved by Factory

Mutual and system manufacturer; length required for thickness of material with metal washers.

D. Sealants: As recommended by membrane manufacturer.

E. Stack Boots: Flexible boot and collar for pipe stacks through membrane.

F. Termination Bar: As recommended by roofing manufacturer.

G. Roof Tread Pads: Multi-ply, asphaltic panels; reinforced carrier sheet, fortified asphaltic core; non-slip top surface of white mineral granules.

1. Size: 2’ x 2’ x 1/2” thick

2. Spacing: 1” to 3” gap between pads

H. Roof pads to be compatible with roofing membrane per manufacturer’s recommendations.

I. Mechanical Fasteners: DrillTec Standard Screws: Alloy steel fastener with CR-

10 coating with a .215 inch diameter thread: Factory Mutual Standard 4470

Approved, #3 Phillips truss head or hex head.

J. Extruded aluminum termination bar with angled lip caulk receiver and lower leg bulb stiffener. Pre-punched slotted holes at 6 inches on center or 8 inches on center. 3/4 inch by 10 feet with 0.090 inch cross section.

K. Expansion Joint Covers: Composite construction of flexible EPDM flashing of black color with closed cell polyurethane foam backing, each edge seamed to aluminum sheet metal flanges, designed for nominal joint width of 1 inch. Include special formed corners, tees, intersections, and wall flashings, each sealed watertight.

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PART 3 EXECUTION

3.1 EXAMINATION

A. Section 01300 - Administrative Requirements: Coordination and project conditions.

B. Verify surfaces and site conditions are ready to receive Work.

C. Verify deck is supported and secure.

D. Verify deck is clean and smooth, free of depressions, waves, or projections, properly sloped to drains and suitable for installation of roof system.

E. Verify deck surfaces are dry and free of snow or ice.

F. Verify roof openings, curbs, pipes, sleeves, ducts, and vents through roof are solidly set, and wood nailing strips and reglets are in place.

3.2 INSTALLATION

A. Vapor Retarder Application:

1. Apply vapor retarder to deck surface with compatible adhesive.

2. Extend vapor retarder under cant strips and blocking to deck edge.

3. Lap flexible flashing over vapor barrier of wall construction to provide continuity of vapor barrier seal. Coordinate with Section 07272, Fluid-

Applied Membrane Air Barriers.

4. Seal perimeter and penetration areas with foam sealant.

B. Insulation Application:

1. Ensure vapor retarder is clean and dry.

2. Mechanically fasten insulation to deck.

3. Place second layer of insulation with joints staggered minimum 6 inches from joints of first layer.

4. Place constant thickness first layer and tapered thickness insulation second layer to required slope pattern.

5. Minimum Total Insulation Thickness: 6 inch.

6. Place boards perpendicular to deck flutes with edges over flute 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.

9. Apply no more insulation than can be covered with membrane in same day.

10. Wood nailers shall be 3-1/2 inches minimum width or 1 inch wider than metal flange. They shall be of equal thickness as the insulation with a

07531 - 8 TPO Single Ply Roofing – minimum 1 inch thickness. All nailers shall be securely fastened to the deck.

11. Miter and fill the edges of the insulation boards at ridges, valleys and other changes in plane to prevent open joints or irregular surfaces. Avoid breaking or crushing of the insulation at the corners.

12. Roof tape, if required over insulation joints, shall be laid evenly, smoothly and embedded in a uniform coating of hot steep asphalt with 4 inches end laps. Care shall be taken to assure smooth application of tape, and full embedment of the tape in the asphalt.

C. Membrane Application:

1. Install in accordance with manufacturer’s recommendations.

2. Apply adhesive at rate as recommended by roofing manufacturer.

3. Roll out membrane, free from air pockets, wrinkles, or tears. Firmly press sheet into place without stretching.

4. Bond sheet to substrate.

5. Overlap edges and ends and seal by heat welding, minimum 3 inches. Seal permanently waterproof. Apply uniform bead of sealant to joint edge.

6. Shingle joints on sloped substrate in direction of drainage.

7. Extend membrane up cant strips minimum of 6 inches onto vertical surfaces.

8. Seal membrane around roof penetrations.

D. Flashings And Accessories:

1. Apply flexible flashings to seal membrane to vertical elements.

2. Secure with termination bar with fasteners at 6 inches on center.

3. Coordinate installation of roof sumps and related flashings.

4. Seal flashings and flanges of items penetrating membrane.

E. Parapet and Building Walls:

1. Secure membrane flashing at the top edge with a termination bar. Water

Block shall be applied between the wall surface and membrane flashing underneath all exposed termination bars. Exposed termination bars shall be mechanically fastened 8 inches on center; termination bars that are counter flashed shall be fastened 12 inches on center.

2. Flash wall scuppers with a coated metal insert that is mechanically attached to the wall and integrated as part of the wall flashing.

3.3 FIELD QUALITY CONTROL

A. Section 01400 - Quality Requirements: Testing and Inspection Services.

B. Require site attendance of roofing materials' manufacturers daily during installation of the Work.

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C. Protect all partially and fully completed roofing work from other trades until completion.

3.4 CLEANING

A. Section 01700 - Execution Requirements: Final cleaning.

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B. In areas where finished surfaces are soiled by Work of this section, consult manufacturer of surfaces for cleaning advice and conform to their documented instructions.

C. Repair or replace defaced or disfigured finishes caused by Work of this section.

3.5 PROTECTION OF INSTALLED CONSTRUCTION

A. Section 01700 - Execution Requirements: Protecting installed construction.

B. Protect building surfaces against damage from roofing Work.

C. Where traffic must continue over finished roof membrane, protect surfaces.

END OF SECTION