075323_02_EPDM_Membrane_Roofing_75MIL_REINF_rev2.pdf

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BLACK HILLS NATIONAL FOREST EPDM MEMBRANE ROOFING

SECTION 075323

EPDM MEMBRANE ROOFING

REVISION 1 – 6/17/2019

REVISION 2 – 7/18/2019

PART 1 - GENERAL

4.1 SUMMARY

A. This Section includes a loosely laid and ballasted membrane-roofing system, insula-tion, roof ladder, and various roofing accessories.

4.2 REFERENCES

A. Roofing Terminology: Refer to the following publications for definitions of roofing work related terms used in this Section.

1. ASTM D 1079 “Standard Terminology Relating to Roofing and Water-proofing.”

2. Glossary of NRCA's "The NRCA Roofing Manual."

3. Roof Consultants Institute “Glossary of Roofing Terms.”

B. Sheet Metal Terminology and Techniques: SMACNA “Architectural Sheet Metal

Manual.”

4.3 QUALITY ASSURANCE

A. General: Installed roofing membrane systems shall remain watertight; and resist specified wind uplift pressures, thermally induced movement, and exposure to weath-er without failure.

B. Material Compatibility: Roofing materials shall be compatible with one another un-der conditions of service and application required, as demonstrated by roofing system manufacturer based on testing and field experience.

C. Wind Uplift Performance: Roofing system shall be identical to systems that have been successfully tested by a qualified testing and inspecting agency to resist wind uplift pressure calculated in accordance with ASCE 7.

A. Installer Qualifications: A qualified firm that is approved, authorized, or licensed by roofing system manufacturer to install manufacturer's product and that is eligible to receive manufacturer's warranty.

B. Manufacturer Qualifications: Qualified manufacturer that has UL listing for roofing system identical to that specified for this Project.

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C. Source Limitations: Obtain all components from the single source roofing system manufacturer guaranteeing the roofing system. All products used in the system shall be labeled by the single source roofing system manufacturer issuing the guarantee.

D. Testing Agency Qualifications: Independent testing agency with the experience and capability to conduct the testing indicated, as documented in accordance with

ASTM E329.

E. Test Reports:

1. Roof drain and leader test or submit plumber’s verification.

2. Roof deck fastener pullout test.

F. Fire-Test-Response Characteristics: Provide membrane 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 accepta-ble to the Contracting Officer.

1. Exterior Fire-Test Exposure: Class A, ASTM E 108, for application and roof slopes indicated.

4.4 SUBMITTALS

A. Installer’s Qualifications.

B. Product Data: For each product indicated.

C. Detailed Shop Drawings: Include plans, elevations, sections, details, and attachments to other Work, including;

1. Base flashings, cants, and membrane terminations.

2. Tapered insulation, including slopes.

3. Crickets, saddles, and tapered edge strips, including slopes.

4. Insulation fastening patterns.

D. Samples: For each product included in membrane roofing system, including accesso-ries.

E. Color samples for edge metal.

F. Ballast Rock

1. Gradation Report.

2. Color sample

G. Structural Analysis Report written by a Structural Engineer licensed in the State of South Dakota that examines whether or not the existing roof structure can withstand the loads placed on it with the new roofing materials. Include a code analysis using the latest versions of the IBC and ASCE-7.

H. Maintenance data.

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I. Sample Warranties.

4.5 CLOSEOUT SUBMITTALS

A. Maintenance data.

B. Warranties:

1. Prior to beginning the work of this section, roofing sub-contractor shall provide a copy of the final System Assembly Letter issued by the roofing manufacturer indicating that the products and system to be installed shall be eligible to receive the specified manufacturer's guarantee when installed by a certified installer in accordance with the manufacturer’s application requirements, inspected and ap-proved by a Technical Representative of the manufacturer.

2. Prior to roofing system installation, roofing sub-contractor shall provide a copy of the Warranty Application Confirmation document issued by the roofing man-ufacturer indicating that the project has been reviewed for eligibility to receive the specified guarantee and registered.

a. “Black Hills National Forest” shall be listed as the Specifier/Consultant of record in the appropriate fields on the Warranty Application Confirmation.

4.6 WARRANTIES

A. Manufacturer’s Special Warranty: Manufacturer's standard form, without monetary limitation, in which manufacturer agrees to repair or replace components of membrane roofing system that fail in materials or workmanship within specified warranty period.

Failure includes roof leaks.

1. Warranty included roofing membrane, base flashings, roofing membrane acces-sories, roof insulation, fasteners, manufacturer’s edge metal products, and other single-source components of roofing system marketed by the manufacturer.

2. Warranty Period: 25 years from date of Substantial Completion.

3. Contractor is required to list “Black Hills National Forest” as the Specifi-er/Consultant of record in the appropriate fields (“Specifier Account”) when ap-plying for the manufacturer’s warranty.

B. Installer’s Warranty: To include all components of roofing system for 2 years from the date of Substantial Completion.

4.7 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 direc-tions 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.

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C. Protect roof insulation materials from physical damage and from deterioration by sun-light, 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 perma-nent deflection of deck.

1.2 PROJECT CONDITIONS

A. Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit roofing system to be installed according to manufacturer's written instructions and warranty requirements.

PART 2 - PRODUCTS

5.1 EPDM ROOFING MEMBRANE

A. EPDM Roofing Membrane: ASTM D 4637, type II, scrim or fabric reinforced uni-form, flexible sheet made from Ethylene Propylene Diene monomer.

1. Available Manufacturers: Subject to compliance with requirements, manufac-turers offering products that may be incorporated into the Work include, but are not limited to, the manufacturers specified.

a. Carlisle SynTec Incorporated.

b. Celotex Corporation.

c. ERSystems.

d. Firestone Building Products Company.

e. GenFlex Roofing Systems.

f. International Diamond Systems.

g. Johns Manville International, Inc.

h. Mule-Hide Products Co., Inc.

i. Protective Coatings, Inc.

j. Roofing Products International, Inc.

k. Stafast Roofing Products.

l. Versico Inc.

2. Thickness: 75 mils, nominal.

3. Exposed Face Color: Black.

4. Factory Inseam Tape: 6 inch wide minimum, butyl splice tape with release film.

5. Basis of Design: Johns Manville’s JM EPDM R.

5.2 AUXILIARY MATERIALS

A. General: Auxiliary materials recommended by roofing system manufacturer for in-tended use and compatible with membrane roofing.

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B. Sheet Flashing: Manufacturer's sheet flashing of same material, type, reinforcement, thickness, and color as sheet membrane. Basis of Design: JM EPDM Peel & Stick Flashing.

C. Primer material: Manufacturer’s standard synthetic-rubber polymer primer. Basis of Design: JM EPDM Tape Primer JM EPDM Tape Primer (Low VOC).

D. Bonding Adhesive: Manufacturer's standard solvent-based bonding adhesive for base flashings. Basis of Design: JM Membrane Bonding Adhesive (TPO&EPDM).

E. Slip Sheet: Manufacturer’s recommended slip sheet, of type required for application.

F. Metal Termination Bars: Manufacturer's standard predrilled stainless-steel or alumi-num bars, with anchors. Basis of Design: JM Termination Systems.

G. Seaming Material: Manufacturer's standard 6-inch- (150-mm-) wide minimum, butyl splice tape with release film. Basis of Design: JM EPDM Seam Tape Plus.

H. Fasteners: Factory-coated steel fasteners and metal or plastic plates meeting corro-sion-resistance provisions in FMG 4470, designed for fastening membrane to sub-strate, and acceptable to membrane roofing system manufacturer. Basis of Design:

High Load Fasteners and Plates.

I. Miscellaneous Accessories: Provide pourable sealers, preformed cone and vent sheet flashings, preformed inside and outside corner sheet flashings, T-joint covers, termination reglets, cover strips, sealants and other accessories. Basis of Design: JM EPDM Pourable Sealer, JM One-Part Pourable Sealer, JM EPDM Peel & Stick Inside/Outside Corners, JM EPDM Peel & Stick Pipe Boots, JM EPDM Peel & Stick Pourable Sealer Pockets, JM EPDM Peel & Stick Sealing Strip, JM EPDM Peel & Stick T-Joint Patch, JM EPDM Protective Stone Mat, JM EPDM Reinforced Termination Strip with Tape (RTS), JM EPDM 10” RPS (Reinforced Perimeter Strip), JM EPDM Pre-Taped Curb Flashing, Single Ply LVOC Caulk – Black and White, JM Weathered Membrane Cleaner, and JM Single Ply Sealing Mastic.

5.3 ROOF INSULATION

A. Polyisocyanurate Board Insulation: ASTM C 1289, Type II, class 1, Grade 2 (20 psi).

B. Basis of Design: Johns Manville’s ENRGY 3.

1. Provide total insulation thickness with minimum R value of 30.

2. Provide insulation package in multiple layers.

3. Minimum Long-Term Thermal Resistance (LTTR)): 5.7 per inch

a. Determined in accordance with CAN/ULC S770 at 75ºF (24ºC)

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4. Provide factory tapered insulation boards to a slope of ¼ inch per foot on roofs that are currently not sloped.

5. Provide preformed saddles, crickets, tapered edge strips, and other insulation shapes where indicated for sloping to drain. Fabricate to slopes indicated.

5.4 INSULATION ACCESSORIES

A. General: Roof insulation accessories recommended by insulation manufacturer for in-tended us and compatible with membrane roofing.

B. Fasteners: Factory-coated steel fasteners and metal or plastic plates meeting corro-sion-resistance provisions in FMG 4470, designed for fastening roof insulation to sub-strate, and acceptable to roofing system manufacturer.

5.5 LIGHTWEIGHT PAVERS

A. Lightweight Ballast pavers made of high density concrete, fire resistant, interlocking design, with the following characteristics:

1. Factory Mutual and UL certified.

2. Compressive Strength: 5000 psi minimum.

3. Density: 125 pcf.

4. Water Adsorption: less than 5%.

5. Flexural Strength: 400 psi minimum.

6. Freeze Thaw: less than 1% loss in weight after 40 cycles.

7. Size: minimum of 8” wide x 16” long x 1 ½” thick.

5.6 AGGREGATE BALLAST

A. Aggregate Ballast: Provide aggregate ballast that will withstand weather exposure without significant deterioration and will not contribute to membrane degradation, of the following type and size:

1. Aggregate Type: Smooth, washed, riverbed gravel or other acceptable smooth-faced stone.

2. Size: ASTM D 448, Size 4, ranging in size from 3/4 to 1-1/2 inches (19 mm to 38 mm).

3. Note: Existing aggregate ballast in intended to be re-used to the extent possible, however, the Contractor may need to add some additional aggregate in order to meet the coverage rate described under “Execution”. Verify that existing aggre-gate meets the above specification. Notify Contracting Officer immediately if it does not.

5.7 AUXILIARY ROOFING SYSTEM COMPONENTS

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A. Edge Metal: Manufacturer’s factory fabricated gravel stop with drip edge, 22 gauge galvanized steel, Kynar finish, with galvanized continuous anchor cleat. Basis of De-sign: Presto-Stop Gravel Stop.

B. Perforated Gravel Stop: Continuous perimeter roof edge system with perforations for drainage.

1. Construction: 0.050 aluminum

2. Finish: Fluoropolymer, 70% PVDF finish – color to be selected from manufac-turer’s full range, with dry film thickness meeting ASTM D 1005, ASTM D 1400, ASTM D4138, or ASTM D 5796.

3. Basis of Design: ATAS Flow-Thru Gravel Stop.

C. Metal/Membrane Flashing: Specially designed and manufactured flashing for sealing and waterproofing. JM EPDM Metal/Membrane Flashing.

D. Metal Flashing Sheet: Metal flashing sheet is specified in Division 07 Section "Sheet Metal Flashing and Trim."

5.8 ROOF LADDER

A. Ship style ladder with deck meeting OSHA 1910.25. Heavy duty steel or aluminum construction with factory welded handrails and galvanized finish. Model SL1 and EXTSL1 by FSI Industries or equal.

PART 3 - EXECUTION

6.1 EXAMINATION AND PREPARATION

A. General:

1. Verify that roof openings and penetrations are in place and set and braced and that roof drains are securely clamped in place.

2. 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.

B. Wood Decks:

1. Clean and remove from existing substrate any sharp projections, dust, debris, moisture, and other substances detrimental to roofing installation in accordance with roofing system manufacturer’s written instructions.

2. Ensure general rigidity and proper slope for drainage.

3. Verify that deck is securely fastened with no projecting fasteners and with no adjacent units more than 1/16 inch (1.6 mm) out of plane relative to adjoining deck.

4. Unacceptable installation of existing decking should be brought the attention of the Contracting Officer prior to beginning roofing work.

J. Protect existing electrical conduit on roof deck.

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K. Proceed with installation only after unsatisfactory conditions have been corrected.

6.2 RE-ROOF PREPARATION

A. Remove debris from roof surface. Demolished roof system may not be stored on roof surface.

B. Remove all roofing membrane, ballasts, coverboards, insulation, fasteners, asphalt, pitch, adhesives, flashings, cants, etc.

1. Remove an area no larger than can be re-roofed in one day.

2. Ballast material must be completely removed from the roof before new work can begin. Ballast material may not be stored on the roof during work.

B. Tear out all base flashings, counterflashings, pitch pans, pipe flashings, vents and like components necessary for application of new membrane.

C. Inspect deck with Contracting Officer to determine extent of deck replacement need-ed.

D. Remove existing decking and install new decking to match existing as directed by Contracting Officer. (Increase/Decrease Pay Item)

E. Store ballast aggregate on the ground in a location as determined by Contracting Of-ficer.

E. Dispose of all removed roofing materials off of Government property.

F. Proceed with installation only after unsatisfactory conditions have been corrected.

6.3 INSULATION INSTALLATION

A. Coordinate installing membrane roofing system components so insulation is not ex-posed to precipitation or left exposed at the end of the workday.

B. Comply with membrane roofing system manufacturer's written instructions for in-stalling roof insulation.

C. 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 instruc-tions. Fill gaps exceeding 1/4 inch (6 mm) with like material.

D. 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.

E. Install tapered edge strips at perimeter edges of roof that do not terminate at vertical surfaces.

F. Loosely Laid Insulation: Loosely lay insulation units.

G. Proceed with installation only after unsatisfactory conditions have been corrected.

6.4 ROOFING MEMBRANE INSTALLATION, GENERAL

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A. Install roofing membrane in accordance with roofing system manufacturer's written in-structions, applicable recommendations of the roofing manufacturer and requirements in this Section.

B. Cooperate with testing and inspecting agencies engaged or required to perform ser-vices 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 with a course of coated felt set in roofing cement or hot roofing asphalt with joints and edges sealed.

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.

E. Proceed with installation only after unsatisfactory conditions have been corrected.

6.5 LOOSELY LAID AND BALLASTED 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 relaxing be-fore installing.

B. Accurately align roofing membranes, without stretching, and maintain uniform side and end laps of minimum dimensions required by manufacturer. Stagger end laps.

C. Mechanically fasten or adhere perimeter of roofing membrane according to require-ments in ANSI/SPRI RP-4.

D. Apply roofing membrane with side laps shingled with slope of deck where possible.

E. Field Fabricated Seam Installation: Clean and prime both faces of splice areas, apply splice tape, and firmly roll side and end laps of overlapping roofing membranes ac-cording to manufacturer's written instructions to ensure a watertight seam installation.

Apply lap sealant and seal exposed edges of roofing membrane terminations.

F. Tape to Tape to Installation: Align membrane for appropriate overlap, clean and prime non-taped face of splice area, remove release liners and firmly roll side and end laps of overlapping roofing membranes according to manufacturer's written instructions to ensure a watertight seam installation.

G. Tape to Standard Sheet Installation: Align membrane for appropriate overlap, clean and prime non-taped face of splice area, remove release liners and firmly roll side and end laps of overlapping roofing membranes according to manufacturer's written in-structions to ensure a watertight seam installation.

H. Leave seams uncovered until inspected by membrane roofing system manufacturer.

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

J. Spread sealant or mastic bed over deck drain flange at deck drains and securely seal roofing membrane in place with clamping ring.

K. Prior to installation of ballast stones, install lightweight pavers on second layer of EPDM membrane, in the locations as shown on the drawings.

L. Aggregate Ballast: Apply existing aggregate ballast uniformly over roofing mem-brane at the rate required by membrane roofing system manufacturer, but not less than the following, spreading with care to minimize possibility of damage to membrane roofing system. Lay ballast as roofing membrane is installed, leaving roofing mem-brane ballasted at the end of the workday. Add additional ballast material as needed to meet requirements below:

1. Ballast Weight: Size 4 aggregate, 10 lb/sq. ft. (50 kg/sq. m).

M. Proceed with installation only after unsatisfactory conditions have been corrected.

6.6 BASE FLASHING INSTALLATION

A. Install sheet flashings and preformed flashing accessories and adhere to substrates ac-cording to membrane roofing system manufacturer's written instructions.

B. Apply bonding adhesive to substrate and underside of sheet flashing at required rate and allow to partially dry. Do not apply bonding adhesive to seam area of flashing.

C. Apply two-sided water-based bonding adhesive at required rate and allow to partially dry. Do not apply bonding adhesive to seam area of flashing.

D. Flash penetrations and field-formed inside and outside corners with cured or uncured sheet flashing.

E. Clean seam areas and overlap and firmly roll sheet flashings into the adhesive.

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

G. Proceed with installation only after unsatisfactory conditions have been corrected.

6.7 ROOF LADDER INSTALLATION

A. Attach ladder and ladder deck to roof as recommended by ladder manufacturer.

6.8 FIELD QUALITY CONTROL

A. Final Roof Inspection: Arrange for roofing system manufacturer's technical personnel to inspect roofing installation on completion and submit report to CO. Notify CO at least 48 hours in advance of the date and time of the inspection.

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B. Repair or remove and replace components of membrane roofing system where test re-sults or inspections indicate that they do not comply with specified requirements.

C. Additional testing and inspections, at the Contractor’s expense, will be performed to determine compliance of replace or additional work within specified requirements.

6.9 PROTECTION AND CLEANING

A. Protect roofing system from damage and wear during remainder of construction peri-od.

B. Correct deficiencies in or remove roofing system that does not comply with require-ments, 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 075323