075323 EPDM Single-Ply Membrane Roofing.pdf

Parking Garage Project Number 693-222 Department of Veterans Affairs Wilkes-Barre, Pennsylvania

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SECTION 075323 - EPDM MEMBRANE ROOFING

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

1.2 SUMMARY

A. This Section includes the following:

1. Adhered membrane-roofing system.

2. Roof insulation

B. Related sections include the following:

1. Division 6 Section “Rough Carpentry” for wood nailers, curbs, and blocking.

2. Division 7 Section “Sheet Metal Flashing and Trim” for flashings and counterflashing.

3. Division 7 Section “Joint Sealants”.

4. Division 22 Section “Plumbing Specialties” for roof drains.

1.3 SUBMITTALS

A. General: Submit the following.

B. Product data, installation instructions, and general recommendations from manufacturer of single-ply membrane system for types of roofing required. Include data substantiating that materials comply with requirements.

C. Pre-roofing conference records.

D. Test data for pullout resistance of fastening system.

E. Certification that materials comply with local VOC limitations.

1.4 QUALITY ASSURANCE

A. Manufacturer: Obtain primary single-ply membrane roofing from a single manufacturer. Provide secondary materials as recommended by manufacturer of primary materials.

B. Installer: Engage an experienced Installer that has specialized in installing roofing systems similar to those required for this Project. Installer must be licensed by manufacturer of primary roofing material.

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1. Work associated with single-ply membrane roofing, including (but not limited to) insulation, flashing, and membrane sheet joint sealers, is to be performed by Installer of this Work.

C. Manufacturer’s Technical Representative Qualifications: An authorized full-time employee representative of manufacturer experienced in the installation and maintenance of the specified roofing system and qualified to determine Installer’s compliance with the requirements of this Project.

D. Testing Agency Qualifications: An independent testing agency with the experience and capability to conduct the testing and inspection indicated, as documented according to ASTM E 548.

1. Inspection personnel shall be certified as a Registered Roof Observer by the Roof Consultants Institute, and shall be experienced in the installation and maintenance of the specified roofing system and qualified to determine Installer’s compliance with the requirements of this Project.

E. Preinstallation Conference: Conduct conference at Project site. Comply with requirements in Division 1 Section "Project Management and Coordination." Review methods and procedures related to roofing system including, but not limited to, the following:

1. Meet with Owner, Architect, Owner's insurer if applicable, testing and inspecting agency representative, roofing Installer, roofing system manufacturer's representative, deck Installer, and installers whose work interfaces with or affects roofing including installers of roof accessories and roof-mounted equipment.

2. Review methods and procedures related to roofing installation, including manufacturer's written instructions.

3. Review and finalize construction schedule and verify availability of materials, Installer's personnel, equipment, and facilities needed to make progress and avoid delays.

4. Examine deck substrate conditions and finishes for compliance with requirements, including flatness and fastening.

5. Review structural loading limitations of roof deck during and after roofing.

6. Review flashings, special roofing details, roof drainage, roof penetrations, equipment curbs, and condition of other construction that will affect roofing system.

7. Review governing regulations and requirements for insurance and certificates if applicable.

8. Review temporary protection requirements for roofing system during and after installation.

9. Review roof observation and repair procedures after roofing installation.

F. UL Listing: Provide labeled materials that have been tested and listed by UL in

"Building Materials Directory" or by other nationally recognized testing laboratory for Class A rated materials/system.

1. The complete installation, including flashing, spacing of fasteners, etc…, shall comply with all FMRC Class 1 fire rated system requirements.

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1.5 PROJECT CONDITIONS

A. Weather: Proceed with roofing work when existing and forecasted weather conditions permit work to be performed in accordance with manufacturers' recommendations and warranty requirements.

B. Substrate Conditions: Do not begin roofing installation until substrates have been inspected and are determined to be in satisfactory condition.

1.6 WARRANTY

A. Manufacturer's Warranty: Submit executed copy of single-ply membrane manufacturer's "Limited Service Warranty" agreement including flashing endorsement, signed by an authorized representative of manufacturer. Provide form that was published with product literature as of date of Contract Documents.

B. Warranty Period: 20 years from date of Substantial Completion.

C. Manufacturer will provide, at no cost to owner, the following services in Years 2, 5, 10 and 15:

1. Inspection by a Technical Service Representative and delivery of a written inspection report documenting roof conditions.

2. Preventative maintenance and necessary repairs, including splits, tears, or breaks in the roof membrane system and flashings which threaten the integrity of the roof system and are not exempt from coverage due to neglect, negligence, vandalism, or other exclusion.

3. General rooftop housekeeping and clean-up, subject to limits, but generally including removal of incidental debris.

D. Special Project Warranty: Submit roofing Installer's warranty, on warranty form at end of this Section, signed by Installer, covering Work of this Section, including all components of roofing system such as roofing membrane, base flashing, roof insulation, fasteners, cover boards, substrate, and walkway products, for the following warranty period:

1. Warranty Period: Two years from date of Substantial Completion.

E. The warranty shall not deprive the Owner of other rights the Owner may have under other provisions of the Contract Documents and will be in addition to and run concurrent with other warranties made by the Contractor under requirements of the Contract Documents.

PART 2 - PRODUCTS

2.1 GENERAL

A. Performance: Provide roofing materials identified to be of generic type indicated and tested to show compliance with required performances.

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B. Compatibility: Provide products recommended by manufacturers to be fully compatible with indicated substrates. Provide separation materials as required to eliminate contact between incompatible materials.

2.2 EPDM MEMBRANE

A. General: Ethylene propylene diene monomers formed into uniform, flexible sheets, complying with ASTM D 4637, Type 1.

1. Thickness: 90 mils, fabric backed

2. Exposed Face Color: White

B. Fully adhered EPDM Membrane: Manufacturer's standard installation.

C. Available Products: Subject to compliance with requirements, products that may be incorporated in the work include, but not necessarily limited to, the following:

1. Carlisle Syntec Systems

2. Firestone Building Products

3. Versico Roofing Systems

2.3 AUXILIARY MATERIALS

A. Sheet Seaming System: Manufacturer's standard materials for sealing lapped joints, including edge sealer to cover exposed spliced edges as recommended by membrane manufacturer.

B. Flashing Accessories: Types recommended by membrane manufacturer, including adhesive tapes, flashing cements, and sealants.

C. Flashing Material: Manufacturer's standard system compatible with single-ply membrane.

D. Slip Sheet: Type recommended by membrane manufacturer for protecting membrane from incompatible substrates.

E. Membrane Adhesive: As recommended by membrane manufacturer for particular substrate and project conditions, formulated to withstand minimum 60-psf uplift force.

1. Provide adhesives that comply with local requirements limiting amounts of volatile organic compounds.

2.4 INSULATING MATERIALS

A. General: Provide insulating materials to comply with requirements indicated for materials and with referenced standards in sizes to fit applications indicated, selected from manufacturer's standard thickness’, widths, and lengths.

1. Provide tapered boards where indicated for sloping to drain. Fabricate

075323 - 5 with a taper of 1/4" per foot, unless otherwise indicated.

B. Polyisocyanurate Board Insulation: Rigid, cellular polyisocyanurate thermal insulation with core formed by using hydrochlorofluorocarbons as blowing agent, to comply with referenced standards and with other requirements indicated below:

1. Federal Standard: FS HH-I-1972/1, Class 1 (nonreinforced core) or 2

(reinforced core).

2. ASTM Standard: ASTM C 1289, Type I, Class 1 or 2.

3. Surface-Burning Characteristics: Maximum flame-spread and smoke-developed indices of 75 and 450, respectively, based on tests performed on unfaced core on thicknesses up to 4 inches.

4. Thermal Resistivity: 7.2 deg F x h x sq. ft./Btu x in. at 75 deg F. Provide insulation in minimum thickness as required to achieve an insulating value of R- 20.

2.5 AUXILIARY INSULATION MATERIALS

A. Adhesive for Bonding Insulation: Type recommended by insulation manufacturer and complying with fire-resistance requirements.

B. Mastic Sealer: Type recommended by insulation manufacturer for bonding edge joints and filling voids.

C. Mechanical Anchors: Corrosion-resistant type as recommended by insulation manufacturer for deck type and complying with fire and insurance wind-uplift rating requirements.

1. Provide system tested and approved for I-72 wind-uplift rating.

PART 3 - EXECUTION

3.1 PREPARING SUBSTRATE

A. General: Comply with manufacturers' instructions to prepare substrate to receive single-ply membrane system.

1. Verify that penetrations and blocking are in place and secured and that roof drains are properly clamped into position.

B. Clean substrate of dust, debris, and other substances detrimental to single-ply system installation. Remove sharp projections.

C. Install flashings, and accessory items as shown and as recommended by manufacturer.

D. Prime substrate where recommended by manufacturer of materials being installed.

E. Prevent compounds from entering and clogging drains and conductors and

075323 - 6 from spilling or migrating onto surfaces of other work.

3.2 INSTALLING INSULATION

A. General: Extend insulation full thickness in two layers, or in multiple layers over entire surface to be insulated, cutting and fitting tightly around obstructions. Form crickets, saddles, and tapered areas with additional material as shown and as required for proper drainage or membrane.

1. Stagger joints in one direction for each course. For multiple layers, stagger joints in both directions between courses with no gaps, to form a complete thermal envelope. Insulation shall be no less than 4” thick in any area on the roof.

2. Provide tapered units to suit drainage pattern indicated.

B. Do not install more insulation in a day than can be covered with membrane before end of day or before start of inclement weather.

C. Set insulation units on substrate with mechanical fasteners or spot adhesives and cover immediately with loose membrane for installation.

D. Provide protection sheet between insulation and membrane when recommended by membrane manufacturer.

E. Perimeter and Corner Attachment: Decrease spacing of fasteners for a distance of 16’ around the perimeter of the building and at the corners.

1. Any whole or partial insulation board which is located within the perimeter or at corners must have increased fasteners applied over the entire board, including any portion of the board that falls outside the perimeter or corner.

2. At roof perimeter, a 50% increase in insulation fasteners is required (1.5 times as many fasteners as required in the main field of the roof).

3. At roof corners, a 75% increase in insulation fasteners is required (1.75 times as many fasteners).

3.3 INSTALLATION, GENERAL

A. Install roofing system in accordance with manufacturer’s recommendations.

B. Install roofing membrane, base flashings, and component materials in compliance with requirements in FMG 4450 and FMG 4470 as part of a membrane roofing system as as listed in FMG’s “Approval Guide” for fire/windstorm classification indicated.

Comply with recommendations in FMG Loss Prevention Data Sheet 1-49.

C. Install roofing system in accordance with the following NRCA Manual Plates and NRCA recommendations; modify as required to comply with requirements of FMG references above:

1. Base Flashing at Parapet Wall: Plates BUR-1 and BUR-1S. Install single ply CSPE flashing in lieu of multiple ply flashing.

2. Perimeter Edge, Raised: Plates BUR- and BUR-2S.

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3. Gutter at Draining Edge: Plates BUR-22 and BUR-22S.

4. Curb Detail at Rooftop HVAC Units, Premanufactured: Plates BUR-12 and BUR-

12S.

5. Curb Detail at Rooftop HVAC Units, Job-Built, Wood: Plates BUR-13 and BUR-

13S.

6. Curb Detail at Skylight, Roof Hatch, and Smoke Vents: Plates 14 and 14S

7. Penetration, Structural Member: Plates BUR-14 and BUR-14S.

8. Penetration, Sheet Metal Enclosure: Plates 15 and 15S

9. Penetration, Stack Flashing: Plates BUR-17 and BUR-17S.

10. Penetration, Pocket: Plates BUR-19 and BUR-19S.

11. Roof Drain: Plates BUR-20 and BUR-22S.

3.4 INSTALLING MEMBRANE

A. Install EPDM sheet over area to receive roofing according to roofing system manufacturer’s written instructions. Unroll sheet and allow to relax for a minimum of 30 minutes.

B. Accurately align sheets and maintain uniform side and end laps of minimum dimensions required by manufacturer. Stagger end laps.

E. Bonding Adhesive: Apply 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. Spread sealant or mastic bed over deck drain flange at deck drains and securely seal roofing sheet in place with clamping ring.

E. Mechanically or adhesively fasten roofing membrane securely at terminations, penetrations, and perimeter of roofing.

F. Apply roofing membrane with side laps shingled with slope of roof deck.

G. Adhesive Seam Installation: Clean both faces of splice areas, apply splicing cement, and firmly roll side and end laps of overlapping roofing membranes according to manufacturer’s written instructions to ensure a watertight seam installation. Apply lap sealant and seal exposed edges of roofing membrane terminations.

1. Apply a continuous bead of in-seam sealant before closing splice if required by membrane roofing system manufacturer.

H. Repair tears, voids, and lapped seams in roofing that does not meet requirements.

3.5 FLASHING INSTALLATION

A. Install sheet flashings and performed flashing accessories and adhere to substrates according to roofing system manufacturer’s written instructions.

B. Apply bonding adhesive to substrate and underside of flashing sheet at

075323 - 8 required rate and allow to partially dry. Do not apply bonding adhesive to seam area of flashing.

C. Flash penetrations and field-formed inside and outside corners with cured or uncured sheet flashing as recommended by manufacturer.

D. Clean splice areas, apply splicing cement, and firmly roll side and end laps of overlapping sheets according to manufacturer’s written instructions to ensure a watertight seam installation. Apply lap sealant and seal exposed edges of sheet flashing termination’s.

E. Terminate and seal top of sheet flashings.

F. Terminate and seal top of sheet flashings and mechanically anchor to substrate through termination bars.

3.6 FIELD QUALITY CONTROL

A. Manufacturer’s Technical Representative: Contractor will engage a qualified manufacturer’s technical representative acceptable to Owner for a minimum of one

(1) full-time day per 40 hour work week on site to perform roof tests and inspections and to prepare test reports.

B. Testing Agency: Contractor will engage a qualified independent testing and inspecting agency acceptable to Owner for a minimum of one (1) full-time day per 40 hour work week on site to perform roof tests and inspections and to prepare test reports.

C. Test Cuts: Before flood coating and surfacing built-up roofing membrane, test specimens will be removed to evaluate problems observed during quality-assurance inspections of roofing membrane as follows:

1. Approximate quantities of components within roofing membrane will be determined according to ASTM D 3617.

2. Test specimens will be examined for interply voids according to ASTM D 3617 and to comply with criteria established in Appendix 3 of ARMA/NRCA's "Quality Control Guidelines for the Application of Built-up Roofing."

D. Final Roof Inspection: Arrange for roofing system manufacturer's technical personnel to inspect roofing installation on completion and submit report to Architect.

1. Notify Architect or Owner 48 hours in advance of date and time of inspection.

E. Repair or remove and replace components of roofing system where test results or inspections indicate that they do not comply with specified requirements.

F. Additional testing and inspecting, at Contractor's expense, will be performed to determine compliance of replaced or additional work with specified requirements.

3.7 PROTECTING ROOFING

A. After completing roofing (including associated work), institute appropriate procedures

075323 - 9 for surveillance and protection of roofing during remainder of construction period. At the end of the construction period, or at a time when remaining construction will in no way affect or endanger roofing, make a final inspection of roofing and prepare a written report to Owner, describing nature and extent of deterioration or damage found.

B. Repair or replace (as required) deteriorated or defective work found at the time of final inspection to a condition free of damage and deterioration at the time of Substantial Completion and according to the requirements of the specified warranty.

END OF SECTION