075216.11- Cold Adhesive Styrene Butadiene Styrene Modified Bituminous Membrane 7-1-2021.pdf

7-1-2021

07 52 16.11 - 1

SECTION 07 52 16.11

COLD ADHESIVE STYRENE-BUTADIENE-STYRENE MODIFIED BITUMINOUS MEMBRANE ROOFING

PART 1 - GENERAL

1.0 SUMMARY

1.1 Contractor shall provide all labor and materials needed to accomplish the tasks associated with this statement of work. The Contractor shall also conduct all work in accordance (IAW)with MATOC and manufacturer’s specifications, the latest International Building Code (IBC), the latest National Electric Safety Code (NESC), NEC, National Fire Protection Association Code, roofing specifications provided and the latest in roofing standards. All roofing details and specifications shall per NRCA (Nationals Roofing Contractors Association) standards. Fall Protection to be installed on per OSHA requirements.

1.2 Contractor will always be required to provide cleanup of the project site to prevent any roofing materials blowing around the base and the flight line. Inside buildings above drop ceilings, Contractor shall clean-up any roof debris and/or tar that has fallen inside. Dispose of all waste generated by this project according to all applicable local regulations.

The building face shall be protected from damage and asphalt spills: all attempts shall be taken to prevent adhesive from splashing on brick fascia and trim. The staging area shall be kept orderly and the paved surfaces area shall be protected from damage. Any damage to the parking lot shall be repaired by the Contractor. The Contractor will access the roofs from TBD. Contractor shall provide their own fall protection. All safety requirements shall be adhered to and shall be the responsibility of both the general contractor and subcontractors. All HVAC and electrical systems are to not to be damaged. Any damaged components will be replaced by contractor.

1.3 Contractor shall verify all dimensions and existing roof conditions, penetrations, pipe sizes, roof drains, etc. and the thickness of the existing EPDM system. Contractor to water-test all roof drains before project and will be responsible for any work after testing. Contractor responsible for all MEP relocation (if necessary, because of roof system heights) required on project. Contractor shall report all finding to CE within two days after surveying roof conditions. Contractor shall also take note of any existing building damages and report such finding to CE.

1.4 All Revision to this Statement of Work will depicted with both bold and underlined text.

1.5 As-builts will be required upon completion of the new built-up roof system outlining all components of the roof including the ISO layout and taper system layout.

1.6 Lightning Protection: The Contractor shall remove the existing lightning protection on the existing roof to the existing grounding cable that is attached to the building structure. Install new lightning protection on the new built-up roof and the existing equipment. New tabs shall be set in Structural Adhesive (or equal) once the new roof is completed. The old lightning protection cable and rods shall be disposed of in the Civil Engineering recycle dumpster. The lightning protection shall be installed by a certified lightning protection company with a minimum of 5

07 52 16.11 - 2 years’ experience. All employees installing the lightning protection system must have their certification as well. Installer of the lightning protection system shall provide the Government with UL Lightning Protection Inspection certification and resistance reading for the facility. Contractor shall adhere to the following codes: UFC 3-575-01, NFPA 780, AFI 32-1065. All components shall comply with UL 96A.

1.7 Warranty Requirements: Provide a 30 year, No Dollar Limit (NDL) warranty with a FM tested 1-300 wind uplift pressure which shall cover full term of warranty on the new BUR roof system. Multiple-source warranties are not acceptable. Manufacturer’s 30-year watertight warranty, including coverage for all metal trim, flashings, and penetrations associated with the built-up. Warranty shall include the following: (on all new installed metal) 20-year coverage on finish including checking, crazing, peeling, chalking, fading and/or adhesion, shall commence on the date of a completed pre-final and beneficial occupancy or final inspection.

Installer shall provide manufacturer with a 2 year-year warranty covering roofing system installation and water tightness, provide a single warranty by a single approved manufacturer membrane roof manufacturer, including detailing and transition between edge metal and roofing system.

Roof installer must be certified by the material manufacturer for the warranties.

1.8 A Full-Time Employee of the manufacturer shall provide inspections, mark corrections and provide installation support at a minimum of 2 days per week during application. Inspection reports will be provided to CE weekly. The reports shall include photo documentation and daily summarizations of work.

Demo:

1.9 Contractor shall remove the entire roof system down to the concrete deck including all edge metal. The metal roof deck shall be clean of all roof debris prior to installing new roof system. The complete assembly must be installed in the same day. The contractor shall not remove more roofing than can be replaced on a daily basis or that can be made watertight by each day’s end.

1.10 Contractor shall remove any broken roof drain baskets or plastic roof drain baskets. Contractor shall remove any rubber (expand flash) expansion joints. Contractor shall remove any existing storm collars, pitch pans or rubber boots unless noted in shop drawings. All recyclable metal removed from the roof, shall be put in the recycle dumpster located in the CE dumpster yard.

New Roof: Roof replacement will be at all levels.

1.11 Contractor shall install two layers of Polyisocyanurate insulation meeting average R-Value of R-25, staggered seams, mechanically attached per manufacturers approved wind uplift fastener patterns for Zone 1, Zone 2 and Zone 3. Contractor is only allowed to use 4x4 insulation boards.

Zone 1: (Field) .75“ wide beads spaced 8” O.C. per 4x4 board, Zone 2:

(Perimeter) .75“ wide beads spaced 8” O.C. per 4x4 board, Zone 3:

(Corner) .75“ wide beads spaced 4” O.C. per 4x4 board.

07 52 16.11 - 3

1.12 The contractor shall install ½” Gypsum-Fiber Roof Board, fiber-reinforced, homogenous composition set in a highly elastomeric one step VOC compliant, high rise roof insulation adhesive that contains no solvents and sets in minutes. Following the Gypsum fiber board, a layer of an 80-mil fiberglass reinforced sandwiched by Styrene-Butadiene- Styrene (SBS) rubber Modified Base Sheet set in a NO VOC’s Cold processed high-performance, NON asphalt based, modified polyether, moisture-cured polymer solvent free adhesive. Followed by a layer of a 155-mil fiberglass reinforced asphalt mineral modified membrane cap sheet also set in a NO VOC’s Cold processed high-performance NON asphalt based modified polyether, moisture-cured polymer solvent free adhesive.

1.13 NO VOC’s Cold processed high-performance asphalt modified polyether;

moisture-cured polymer solvent free adhesive shall be applied at 2.5 gals per square (100 sf) per interply.

1.14 24-gauge Metal Edge shall have inside and outside corners and splice plates. All meeting ANSI/SPRI ES-1.

1.15 All pipe penetrations shall have new 24 gauge stainless steel pitch pans with hoods and filled with an all-weather, fast setting, chemical action concrete patching material and a two-part, pourable, self-leveling, 100% solids, urethane sealant.

1.16 Any area where a termination bar is installed, the contractor shall install the manufacturers approved roof cement three coarse application over the termination bar and install a metal counterflashing over the termination bar.

1.17 All curbs shall be with one layer of new 80-mil fiberglass reinforced sandwiched by Styrene-Butadiene-Styrene (SBS) rubber Modified Base Sheet and one layer of a 155-mil fiberglass reinforced asphalt Mineral modified membrane cap sheet. The 80-mil fiberglass reinforced sandwiched by Styrene-Butadiene-Styrene (SBS) rubber Modified Base Sheet and 155-mil fiberglass reinforced SBS asphalt modified membrane cap sheet flashings shall be run up and over the curb, 2“over the wood nailers. All mechanical equipment/curbs are to have new prefinished counter-flashings installed. Color chosen by owner.

1.18 All new perimeter edge and fascia metal shall be 24-gauge flat stock approved by manufacturer, bended for the application, (counterflashing, drip edge, gutters, downspouts, storm collars, etc). All metal joints shall have butyl caulking applied. Drip edge metal shall be primed with recommended Manufacturer guidelines prior, followed with a bead of urethane sealant along the edge of the cap sheet and the drip edge. Drip edge will have fire-rated wood nailers added to existing to match new roof height. Existing copper through-wall counterflashing will remain in place installing new termination bar and stainless steel slip metal counterflashing under existing and sealing to water-tight condition.

1.19 All roof drains shall have cast metal drain baskets, Contractor shall verify if metal or plastic and immediately notify CE. Any broken metal roof drains shall be replaced. The existing roof drain clamping rings and strainers are to be replaced with new steel clamping rings and cast iron strainers. New all stainless steel all-thread, nuts and washers are to be installed. Clamping rings and strainers are to be primed and painted red.

07 52 16.11 - 4

1.20 Contractor shall install a taper system to allow for proper drainage to the roof drains and to prevent any standing water at corners. Crickets shall also be installed behind any curbs which will not allow water flow to a roof drain or gutters. Contractor shall provide a layout of the taper system with an indication of the thickness.

1.21 At walls, no vertical flashing joints shall be wider than the roll of flashing materials. At walls contractor shall install one layer of 80-mil fiberglass reinforced sandwiched by Styrene-Butadiene-Styrene (SBS) rubber Modified Base Sheet followed by one layer of 145-mil fiberglass reinforced asphalt Polyurethane thermoset modified membrane cap sheet, all set in a trowel grade cold applied, ZERO VOC’s, NO Asphalt based, 100% polyether moisture-cured flashing adhesive at 3 gals per square per interply.

1.22 Where applicable, any new or existing curbs shall meet the 8” minimum height per NRCA standards. If needed, treated 2x4 lumber shall be installed to meet the required height. Any sleeper shall also be treated 4x4 blocks or pre-manufactured sleepers.

1.23 All pitch pan shall be filled 3 quarters (¾) of the way with an all-weather, fast setting, chemical action concrete patching material and the last 1 quarter (¼) filled with a two-part, pourable, self-leveling, 100% solids, urethane sealant. Any pipe penetration thru the pitch pans shall be temporarily protected from any asphalt attaching to the pipe.

Contractor shall follow the manufacturer guideline as indicated below.

All pitch pan shall than have a rain collar installed as well with a 1/2” offset to accept a bead of caulk.

1.24 Any metal counterflashing or other areas requiring caulking shall be a polyurethane sealant. The polyurethane sealant shall be a single-component, moisture-curing and non-sagging. It shall create an effective bond and seal between materials of similar and dissimilar surfaces, porosities and coefficients of expansion. Sealant shall be a urethane caulking approved by manufacturer.

Material Requirement:

1.25 The following Modified Built-up roofing (BUR) materials shall be sourced from one manufacturer that meets the following salient characteristic and all roofing materials including metal to be supplied shall be warranted by one manufacturer. A Modified BUR warranty shall cover all roofing materials from a single supplier.

Base Sheet/Base Sheet Flashing Membrane: Base sheet shall have a high strength, puncture and fatigue resistant, rubber modified roofing membrane designed for use as the waterproofing and reinforcement layer of a built up or modified roofing system.

Shall consist of fiberglass reinforcement sandwiched by Styrene- Butadiene-Styrene (SBS rubber with a high penetration index of asphalt mixture. Provide long term resistance to splits and tears, with fiberglass scrim in cross machine directions. Must have advances SBS rubber technology which provides increased

07 52 16.11 - 5 thermal shock resistance, UV protections, heat resistance and elongation and low temperature flexibility. Must have a nominal thickness of 80 mils.

• Tensile Strength, ASTM D 412

• 2 in/min. @ 73.4 +/- 3.6 deg. F MD 100 lbf/in XD 100 lbf/in

• Tear Strength, ASTM D 5147

• 2 in/min. @ 73.4 +/- 3.6 deg. F MD 110 lbf XD 110 lbf

• Elongation at Maximum Tensile, ASTM D 5147

• 2 in/min. @ 73.4 +/- 3.6 deg. F MD 2.0 % XD 2.0 %

• 18% Pre-consumer recycled content

• Low Temperature Flexibility, ASTM D 5147, Passes -20 deg. F

Cap Sheet/Flashing Membrane: 155 mil SBS (Styrene-Butadiene-Styrene) mineral surfaced, rubber modified roofing membrane reinforced with a fiberglass and polyester composite scrim. Cap sheet membrane shall feature a fiberglass reinforced asphalt-based membrane modified with a specially designed polyurethane resin designed to extend roof longevity. Membrane shall have puncture and fatigue resistant.

Membrane must have excellent heat and chemical resistance. The cap sheet must have a tensile strength of 310 lbs./in and tear strength of 500 lbf/in. in a machine and cross machine direction. Nominal thickness shall be no less than 155 mils.

• ASTM D 6162, Type III Grade G

• Tensile Strength, ASTM D 5147

• 2 in/min. @ 73.4 +/- 3.6 deg. F MD 310 lbf/in XD 310 lbf/in

• Tear Strength, ASTM D 5147

• 2 in/min. @ 73.4 +/- 3.6 deg. F MD 500 lbf/in XD 500 lbf

• Elongation at Maximum Tensile, ASTM D 5147

• 2 in/min. @ 73.4 +/- 3.6 deg. F MD 8% XD 8%

• Low Temperature Flexibility, ASTM D 5147, Passes -30 deg. F

• Pre-Consumer Recycled Content: 11%

• Color: Grey

Interply Adhesive: A zero VOC high performance, NON asphalt based modified polyether, moisture-cured polymer adhesive, capable of being directly applied to coverboard, ISO, and environmentally friendly with the following characteristics:

• Density @ 77F, ASTM D 1475 at 11.4lbs/gal

• Non Volatile, ASTM D 4586, 100%

• Viscosity 20,000-50,000cPs

• Tack Free @ 70 F, 40-60 minutes

• Flash point ASTM D 93 400 F

• Apply by squeegee

• No adverse effects on sheet softening, odor free

Flashing Adhesive: A flashing adhesive shall be a trowel grade, cold applied, zero VOC, Zero asphalt based, 100% polyether moisture-cured flashing adhesive. Flashing adhesive must bonds tenaciously to SBS modified bitumen membrane and ready to use right out of the can. Must meet the following characteristic:

• Density @77F, 11.8 lbs/gal

• Non Votaile, ASTM D 4586 100%

07 52 16.11 - 6

• Lap shear 50 psi

• Tensile strength 50 psi

• Tack free 40-60 minutes @ 70 F

• Flash point ASTM D 93 400F

• VOC 0 g/l

Gypsum Board adhesive: Must be a highly elastomeric, one step, VOC compliant insulation adhesive that contains no solvents and will set in a few minutes. Two component insulation adhesive that does not require mixing and compatibles with a variety of insulation types, base sheets, and insulation boards. Gypsum board adhesive must meet the following:

• Tensile strength 250 psi

• Viscosity 22,000-60,000 cP

• Peel strength 17 lb./in

• Flexibility -70 degress F.

Surfacing: Reflective Granular/Mineral embedded Cap Sheet

Roofing Cement: A flashing adhesive shall be a trowel grade, cold applied, zero VOC, NON asphalt based, 100% polyether moisture-cured flashing adhesive. Flashing adhesive must bonds tenaciously to SBS modified bitumen membrane and ready to use right out of the can. Must meet the following characteristic:

• Density @77F, 11.8 lbs/gal

• Non Votaile, 100%

• Lap shear 50 psi

• Tensile strength 50 psi

• Tack free 40-60 minutes @ 70 F

• Flash point 400F

Sealant: Sealant shall be a non-sag polyurethane sealant, single component and moisture curing. It shall be designed to maintain an effective bond and seal between materials of similar and dissimilar surfaces.

• Tensile strength of 225 psi

• Elongation of 450-550%

• Hardness, shore A 25-35

• Tack free less than 1 hour

• No sag

• VOC 19 g/L

Pitch Pan Sealer: Pitch pan sealer shall be a two part, pourable, self-leveling, 100% solid urethane, asbestos free sealant, shall be elastic, weather resistant, watertight, non-shrinkable at any age & tack free with 8 hours. Sealer shall meet or exceed the following:

Viscosity for Part A component shall be 100,000 -150,000cps, Part B component shall be 500-2,000cps, Durometer shall be 40-50 shore, elongation 250%, tensile strength 200, 100 mil, moisture vapor transmission 0.05 Perm/inches.

• Flexural Strength 3 x 4 x 16” Prisms 550 PSI

• Compressive Strength, 1 hr/2,000psi, 28 days/8500 psi

07 52 16.11 - 7

• Set time, 15 minutes

• ASTM D 412

• Elongation 250 mil @ 70 deg/250%

• Tensile Strength 200, 100 mil

• Peel Adhesion ASTM C 836

Edge Metal: Must be 24-gauge, G-90 Galvanized steel with a kynar color finish, must have pre-manufactured inside and outside mitered corners, end caps, transitions, and Tees. New fire-rated wood-nailers will be installed to match new height of roofing insulation and roofing membrane.

• ANSI/SPRI-ES1

• Kynar finish

• Support anchor plates

• 20 year warranty, paint finish, chipping and fading.

Slip Counter Flashing Metal: Must be 24-gauge stainless steel where metal meets copper wall flashing.

1.1 RELATED REQUIREMENTS

A. Preparation of Existing Membrane Roofs and Repair Areas: Section

07 01 50.19, PREPARATION FOR REROOFING.

B. Roof Insulation: Section 07 22 00, ROOF AND DECK INSULATION.

C. Sheet Metal Components: Section 07 60 00, FLASHING AND SHEET METAL.

1.2 APPLICABLE PUBLICATIONS

A. Comply with references to extent specified in this section.

B. American Society of Civil Engineers/Structural Engineering Institute

(ASCE/SEI):

1. 7-10 - Minimum Design Loads for Buildings and Other Structures.

C. American Society of Heating, Refrigerating and Air-Conditioning

Engineers, Inc. (ASHRAE):

1. 90.1-13 - Energy Standard for Buildings Except Low-Rise Residential

Buildings.

D. ASTM International (ASTM):

1. C1549-09(2014) - Determination of Solar Reflectance Near Ambient

Temperature Using a Portable Solar Reflectometer.

2. D4073-06(2013) - Tensile-Tear Strength of Bituminous Roofing

Membranes.

3. D4263-83(2012) - Indicating Moisture in Concrete by the Plastic

Sheet Method.

4. D4601/D4601M-04(2012)e1 - Asphalt-Coated Glass Fiber Base Sheet Used in Roofing.

07 52 16.11 - 8

5. D6162/D6162M-00(2015)e1 - Styrene Butadiene Styrene (SBS) Modified

Bituminous Sheet Materials Using a Combination of Polyester and

Glass Fiber Reinforcements.

6. E108-11 - Fire Tests of Roof Coverings.

7. E408-13 - Total Normal Emittance of Surfaces Using Inspection-Meter

Techniques.

8. E1918-06(2015) - Measuring Solar Reflectance of Horizontal and

Low-Sloped Surfaces in the Field.

9. E1980-11 - Calculating Solar Reflectance of Horizontal and

Low-Sloped Opaque Surfaces.

E. Cool Roof Rating Council (CRRC):

1. 1-15 - Product Rating Program.

F. National Roofing Contractors Association (NRCA):

1. Manual-15 - The NRCA Roofing Manual: Membrane Roof Systems.

G. UL LLC (UL):

1. 580-06 - Tests for Uplift Resistance of Roof Assemblies.

2. 1897-15 - Uplift Tests for Roof Covering Systems.

H. U.S. Department of Commerce National Institute of Standards and

Technology (NIST):

1. DOC PS 1-09 - Structural Plywood.

2. DOC PS 2-04 - Performance Standard for Wood-Based Structural-Use

Panels.

I. U.S. Environmental Protection Agency (EPA):

1. EPA 600/R-93/116-93 - Method for the Determination of Asbestos in

Bulk Building Materials.

2. Energy Star - ENERGY STAR Program Requirements for Roof Products

Version 3.0.

1.3 PREINSTALLATION MEETINGS

A. Conduct preinstallation meeting at project site minimum 30 days before beginning Work of this section.

1. Required Participants:

a. Contracting Officer's Representative.

b. Contractor.

c. Installer.

d. Manufacturer's field representative.

2. Meeting Agenda: Distribute agenda to participants minimum 3 days before meeting.

a. Installation schedule.

07 52 16.11 - 9

b. Installation sequence.

c. Preparatory work.

d. Protection before, during, and after installation.

e. Installation.

f. Terminations.

g. Transitions and connections to other work.

h. Inspecting and testing.

i. Other items affecting successful completion.

j. Pull out test of fasteners.

k. Material storage, including roof deck load limitations.

3. Document and distribute meeting minutes to participants to record decisions affecting installation.

1.4 SUBMITTALS

A. Submittal Procedures: Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

B. Submittal Drawings:

1. Roofing membrane layout.

C. Manufacturer's Literature and Data:

1. Description of each product.

2. Installation instructions.

3. Warranty.

D. Samples:

1. Roofing Membrane: 150 mm (6 inch) square.

2. Base Flashing: 150 mm (6 inch) square.

3. Fasteners: Wood Nailers

4. Roofing Membrane Seam: 300 mm (12 inches) square.

E. Sustainable Construction Submittals:

1. Solar Reflectance Index (SRI) for roofing membrane.

2. Low Pollutant-Emitting Materials:

a. Show volatile organic compound types and zero quantities.

F. Certificates: Certify products comply with specifications.

1. Fire and windstorm classification.

2. High wind zone design requirements.

3. Energy performance requirements.

G. Qualifications: Substantiate qualifications comply with specifications.

1. Installer, including supervisors with project experience list.

2. Manufacturer's field representative with project experience list.

H. Field quality control reports.

07 52 16.11 - 10

1. Full-time manufacturer representative inspecting the project at least two times per week and providing weekly reports.

I. Temporary protection plan. Include list of proposed temporary materials.

J. Operation and Maintenance Data:

1. Maintenance instructions.

1.5 QUALITY ASSURANCE

A. Installer Qualifications:

1. Approved by roofing system manufacturer as installer for roofing system with specified warranty.

2. Regularly installs specified products.

3. Installed specified products with satisfactory service on five similar installations for minimum five years.

a. Project Experience List: Provide contact names and addresses for completed projects.

4. Employs full-time supervisors experienced installing specified system and able to communicate with Contracting Officer's

Representative and installer's personnel.

B. Manufacturer's Field Representative:

1. Manufacturer's full-time technical employee.

1.6 DELIVERY

A. Deliver products in manufacturer's original sealed packaging.

B. Mark packaging, legibly. Indicate manufacturer's name or brand, type, and manufacture date.

C. Before installation, return or dispose of products within distorted, damaged, or opened packaging.

1.7 STORAGE AND HANDLING

A. Comply with NRCA Manual storage and handling requirements.

B. Store products indoors in dry, weathertight facility.

C. Store adhesives according to manufacturer's instructions.

D. Protect products from damage during handling and construction operations.

E. Products stored on the roof deck must not cause permanent deck deflection.

1.8 FIELD CONDITIONS

A. Environment:

07 52 16.11 - 11

1. Product Temperature: Minimum 4 degrees C (40 degrees F) for minimum

48 hours before installation. Provide conditioned room temperature for all liquid material.

2. Weather Limitations: Install roofing only during dry current and forecasted weather conditions.

1.9 WARRANTY

A. Construction Warranty: FAR clause 52.246-21, "Warranty of

Construction."

B. Manufacturer's Warranty: 30 year, No Dollar Limit (NDL) warranty with a

1-300 wind uplift pressure which shall cover full term of warranty on the new BUR roof system. Multiple-source warranties are not acceptable. Manufacturer’s 30-year watertight warranty, including coverage for all metal trim, flashings, and penetrations associated with the built-up roof and metal roof areas. Warranty shall include the following: (on all new installed metal) 20-year coverage on finish including checking, crazing, peeling, chalking, fading and/or adhesion, shall commence on the date of a completed pre-final and beneficial occupancy or final inspection. Installer shall provide manufacturer with a 2 year warranty covering roofing system installation and water tightness, provide a single warranty by a single approved manufacturer membrane roof manufacturer, including metal detailing and transition between the two materials types.

PART 2 - PRODUCTS

2.1 SYSTEM DESCRIPTION

A. Roofing System: Modified bituminous sheet roofing and base flashing installed using no voc’s cold-applied adhesive, non-asphalt based, on new construction with solar reflective granules.

2.2 SYSTEM PERFORMANCE

A. Design roofing system meeting specified performance:

1. Load Resistance: ASCE/SEI 7; Design criteria meeting minimum FM assembly 1-300 wind uplift rating.

a. Uplift Pressures:

1) Corner Uplift Pressure: (62.8 psf).

2) Perimeter Uplift Pressure: (46.1 psf).

3) Field-of-Roof Uplift Pressure: (29.4 psf).

2. Energy Performance:

07 52 16.11 - 12

a. EPA Energy Star Listed for low-slope roof products.

b. ASTM E1980; Minimum 78 Solar Reflectance Index (SRI).

c. CRRC-1; Minimum 0.70 initial solar reflectance and minimum 0.75 emissivity.

B. Roofing Membrane System Load-Strain Properties: Provide a roofing membrane identical to component systems that have been successfully tested by a qualified independent testing and inspecting agency to meet the following minimum load-strain properties at membrane failure when tested according to ASTM D2523:

C. Tensile strain at failure, at -18 degrees C (0 degrees F): 310 lbf./in.)cross machine direction, minimum; 3.5 percent elongation at break.

2.3 PRODUCTS - GENERAL

A. Basis of Design: Section 09 06 00, SCHEDULE FOR FINISHES.

B. Provide roof system components from one manufacturer.

C. Sustainable Construction Requirements:

1. Solar Reflectance Index: 78 minimum.

2. Biobased Content: Where applicable, provide products designated by

USDA and meeting or exceeding USDA recommendations for bio-based content, and products meeting Rapidly Renewable Materials and certified sustainable wood content definitions; refer to www.biopreferred.gov.

2.4 MEMBRANE AND SHEET MATERIALS

A. Membrane Materials, General: Provide combination of base, ply, and cap sheet materials that have been tested in combination and comply with specified load/strain performance.

B. Base Sheet: ASTM D4601/D4601M, Type II, nonperforated, with the following properties:

1. Breaking Strength, minimum, ASTM D5147: cross machine direction, (100 lbf/in).

2. Tear Strength, minimum, ASTM D45147: cross machine direction, (110 lbf.).

C. Membrane Cap Sheet: ASTM D6162, Grade G, Type III, glass-fiber-reinforced, SBS modified asphalt sheet; granular surfaced;

and as follows:

1. Exterior Fire-Test Exposure, ASTM E108: Class A.

http://www.biopreferred.gov/

07 52 16.11 - 13

2. Tensile Strength at 23 degrees C (73 degrees F), minimum, cross machine direction, ASTM D5147/D5147M: (310 lbf/in).

3. Tear Strength at 23 degrees C (73 degrees F), minimum, cross machine direction, ASTM D5147: (500 lbf.).

4. Elongation at 23 degrees C (73 degrees F), minimum, cross machine direction, at 5 percent maximum load ASTM D5147/D5147M: 8 percent.

5. Low Temperature Flex, maximum, ASTM D5147/D5147M: (-30 degrees F).

Granule Color: White.

D. Base Flashing Backer Sheet: ASTM D4601/D4601M, Type II.

E. Base Flashing Sheet: ASTM D6162, Grade G, Type III, polyester-reinforced, SBS-modified asphalt sheet; with granular surface; Granule Color: White.

2.5 ADHESIVE MATERIALS

A. General: Adhesive and sealant materials recommended by roofing system manufacturer for intended use, identical to materials utilized in approved listed roofing system, and compatible with roofing membrane.

B. Cold-Applied Adhesive for Sheet Membrane: A NO VOC’s high performance, NON asphalt based modified polyether, moisture-cured polymer adhesive, capable of being directly applied to coverboard, ISO, and environmentally friendly, with the following physical properties:

1. Asbestos Content, EPA 600 R-93/116: None.

2. Nonvolatile Content, minimum, ASTM D4856: 100% percent.

C. Cold-Applied Adhesive for Membrane Flashing: One-part, cold-applied adhesive compatible with specified roofing membranes and flashings, with the following physical properties:

1. Asbestos Content, EPA 600 R-93/116: None.

2. Nonvolatile Content, minimum, ASTM D4586: 100% percent.

2.6 FASTENERS

A. Accessory Fasteners: Corrosion-resistant fasteners compatible with adjacent materials and recommended for application by manufacturer of component to be fastened.

2.7 ROOF WALKWAY

A. Prefabricated asphalt mineral sheet consisting of a homogeneous core of asphalt and reinforcement:

1. Top side of surfaced with granules. Granule Color: White.

07 52 16.11 - 14

2. Size: Minimum (155 Mils) thick, manufacturer’s standard size, but minimum (14 inches) in least dimension and (36 inches) in length.

2.8 ACCESSORIES

A. Temporary Protection Materials:

1. Expanded Polystyrene (EPS) Insulation: ASTM C578.

2. Plywood: NIST DOC PS 1, Grade CD Exposure 1.

3. Oriented Strand Board (OSB): NIST DOC PS 2, Exposure 1.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine and verify substrates for product installation with roofing

Installer and roofing inspector present.

1. Verify roof penetrations are complete, secured against movement, and fire stopped.

2. Verify roof deck is adequately secured to resist wind uplift.

3. Verify roof deck is clean, dry, and in-plane ready to receive roofing system.

B. Correct unsatisfactory conditions before beginning roofing work.

3.2 PREPARATION

A. Complete roof deck construction before commencing roofing work:

1. Curbs, blocking, edge strips, nailers, cants, and other components to which roofing and base flashing is attached, in place ready to receive insulation and roofing.

2. Coordinate roofing membrane installation with flashing work and roof insulation work so insulation and flashing are installed concurrently to permit continuous roofing operations.

3. Complete installation of flashing, insulation, and roofing in same day except for the area where temporary protection is required when work is stopped for inclement weather or end of workday.

B. Dry out surfaces that become wet from any cause during progress of the work before roofing work is resumed. Apply materials to dry substrates, only.

C. Broom clean roof decks. Remove dust, dirt and debris.

D. Remove projections capable of damaging roofing materials.

E. Concrete Decks, except Insulating Concrete:

1. Test concrete decks for moisture according to ASTM D4263 before installing roofing materials. Remove any loose existing asphalt.

07 52 16.11 - 15

2. Prime concrete decks, with insulation adhesive primer as specified.

Keep primer back 100 mm (4 inches) from precast concrete deck joints.

3. Allow primer to dry before application of bitumen.

F. Existing Membrane Roofs and Repair Areas:

1. Comply with requirements in Section 07 01 50.19 PREPARATION FOR

REROOFING.

3.3 TEMPORARY PROTECTION

A. Install temporary protection consisting of a temporary seal and water cut-offs at the end of each day's work and when work is halted for an indefinite period or work is stopped when precipitation is imminent.

B. Install temporary cap flashing over top of base flashings where permanent flashings are not in place to protect against water intrusion into roofing system. Securely anchor in place to prevent blow off and damage by construction activities.

C. Temporarily seal exposed insulation surfaces within roofing membrane.

1. Apply temporary seal and water cut off by extending roofing membrane beyond insulation and securely embedding edge of the roofing membrane in 6 mm (1/4 inch) thick by 50 mm (2 inches) wide strip of temporary closure sealant. Weight roofing membrane edge with sandbags, to prevent displacement; space sandbags maximum 2400 mm

(8 feet) on center.

2. Direct water away from work. Provide drainage, preventing water accumulation.

3. Check daily to ensure temporary seal remains watertight. Reseal open areas and weight down.

D. Before the work resumes, cut off and discard portions of roof membrane in contact with temporary seal.

1. Cut minimum 150 mm (6 inches) back from sealed edges and surfaces.

E. Remove sandbags and store for reuse.

3.4 INSTALLATION - GENERAL

A. Install products according to manufacturer's instructions and approved submittal drawings.

1. When manufacturer's instructions deviate from specifications, submit proposed resolution for Contracting Officer's Representative consideration.

B. Comply with NRCA Manual installation instructions.

07 52 16.11 - 16

C. Comply with ASCE 7-10 meeting FM 1-300 for uplift resistance.

3.5 INSTALLATION OF MODIFIED BITUMEN MEMBRANE

A. Primer: Apply primer to substrates where recommended by roofing manufacturer, in application quantities recommended by roofing manufacturer.

B. Cold-Applied Adhesive: Apply cold-applied adhesive in application quantities recommended by roofing manufacturer at substrate, between membrane sheets, where required.

C. Membrane Sheets:

1. Number of Plies: Two, minimum, including base sheet and cap sheet.

2. Begin laying sheets at the low points.

3. Roll sheets into cold-applied adhesive brushing down to firmly embed, free of wrinkles, fish mouths, blisters, bubbles, voids, air pockets or other defects that prevent complete adhesion. Use weighted roller on membrane field and laps

4. Cut to fit closely around pipes, roof drains, bitumen stops, and similar roof projections.

5. Lap sheets shingle fashion starting with starter strips at right angles to slope of roof.

6. Laps for Top Sheet and Base Sheet:

a. Base sheet, lapped 75 mm (3 inches).

b. Install 450 mm (18 inch) starting widths, lap top sheet 475 mm

(19 inches).

c. Lap end joints of sheet 150 mm (6 inches). Stagger end joints in relation to end joints in adjacent and proceeding plies.

D. Roof Edges and Terminations:

1. Where nailers occur at roof edges under gravel stops or penetrations to receive metal base flashing, apply a continuous strip of underlayment over the nailers before the first ply sheet is applied.

Strip shall be installed on top of venting base sheet if any.

2. After membrane is installed, turn the underlayment back over the roofing, and secure in place with cold-applied adhesive before gravel stops or other metal flanges extending out onto the membrane are installed.

3. Where cants occur at vertical surfaces, cut off roofing sheets 50 mm

(2 inches) above top of cant strips, except at prefabricated curbs, scuttles and other roof accessories having integral cants, extend

07 52 16.11 - 17 membrane over cant and up vertical surface to top of curb or nailer as shown.

4. Where fascia-cant occurs at roof edges, extend membrane beyond outside cant face and cut off at outside after base flashing is installed.

5. Where reglet occurs at vertical surfaces, extend plies roofing sheets up into reglet the full depth of the reglet.

3.6 BASE FLASHING

A. Provide built-up base flashing over cants and as necessary to make work watertight.

B. Prime vertical surfaces of masonry and concrete with asphalt primer except where vented base sheet is required to provide edge venting.

C. Apply flashing on top of roofing, up face of cant and up the face of the vertical surface, at least 200 mm (8 inches) above the roofing but maximum 350 mm (14 inches) above the roofing, generally full height beneath counter flashing or top of curb flashing.

1. At fascia-cants, extend to top of cant and cut off at top of cant.

2. At reglet, extend full depth into the reglet.

3. Where venting base sheet is used with insulating concrete, do not seal edges of venting base sheet with bitumen; allow for venting.

D. Apply two plies of modified bituminous sheet.

1. Extend the first ply (6 inches) out on the roofing, and the second ply (3 inches) beyond the first ply. Lap ends 75 mm (3 inches) with joints broken 450 mm (18 inches) in each ply. Use smooth surface modified bituminous sheet for first ply.

2. Use granular surfaced modified bitumen cap sheet.

E. Set base flashing in a solid application of cold-applied adhesive.

1. Set cap sheet in cold-applied adhesive with laps sealed with cold-applied adhesive.

2. Except for venting roof edges, seal the top edge of the base flashing with roof cement.

F. Except at metal fascia cants, secure top edge of base flashing with nails on a line approximately 25 mm (1 inch) below top edge, spaced maximum 200 mm (8 inches) on center.

1. Cover nail heads with roof flashing adhesive.

2. Cover the top of the base flashing with counterflashing as specified in Section 07 60 00, FLASHING AND SHEET METAL. At the fascia cants

07 52 16.11 - 18 secure the top edge of the flashing with fascia compression clamp as specified in Section 07 60 00, FLASHING AND SHEET METAL.

3.7 STRIPPING

A. Coordinate to set flanges of metal flashing in roof cement on top sheet of the modified bituminous roofing and mailing to blocking with Section

07 60 00, FLASHING AND SHEET METAL.

B. Cover that portion of the horizontal flanges of metal base flashings, gravel stops, and other flanges extending out onto the roofing with modified bituminous sheet.

C. Extend the sheet out on the roofing 150 mm (6 inches) beyond the edge of the metal flange. Cut edge to fit tight against vertical members of flange.

D. Prime flange before stripping, embed sheet in cold-applied adhesive.

3.8 WALKWAY INSTALLATION

A. Install roof walkways where shown.

B. Use walkways in the following locations as a minimum.

C. At working and access areas of equipment requiring servicing.

D. At equipment having discharges detrimental to roof membrane, under gooseneck discharges from kitchens and chemical exhausts.

E. At landing points for hatches, ladders and doors entering roof level.

F. Set prefabricated planks in solid application of cold-applied adhesive.

Maintain 75 mm (3 inch) to 150 mm (6 inch) space between planks.

3.9 FIELD QUALITY CONTROL

A. Field Inspections:

B. Field Tests: Performed by testing laboratory specified in Section

01 45 29, TESTING LABORATORY SERVICES.

1. Examine and probe roofing membrane and flashing seams in presence of

Contracting Officer's Representative and Manufacturer's field representative.

2. Probe seams to detect marginal bonds, voids, skips, and fishmouths.

3. Cut 100 mm (4 inch) wide by 300 mm (12 inch) long samples through seams where directed by Contracting Officer's Representative.

4. Cut one sample for every 450 m (1500 feet) of seams.

5. Cut samples perpendicular to seams.

6. Failure of samples to pass ASTM D1876 test will be cause for rejection of work.

07 52 16.11 - 19

7. Repair areas where samples are taken and where marginal bond, voids, and skips occur.

8. Repair fishmouths and wrinkles by cutting to lay flat. Install patch over cut area extending 100 mm (4 inches) beyond cut.

C. Manufacturer Services:

1. Inspect roofing project at a minimum of two times a week.

2. Issue supplemental installation instructions necessitated by field conditions.

3. Prepare and submit inspection reports.

4. Certify completed installation complies with manufacturer's instructions and warranty requirements.

3.10 CLEANING

A. Remove excess adhesive before adhesive sets.

B. Clean exposed roofing surfaces. Remove contaminants and stains to comply with specified solar reflectance performance.

3.11 PROTECTION

A. Protect roofing system from traffic and construction operations.

1. Protect roofing system when used for subsequent work platform, materials storage, or staging.

2. Distribute scaffolding loads to exert maximum 50 percent roofing system materials compressive strength.

B. Loose lay temporary insulation board overlaid with plywood or OSB.

1. Weight boards to secure against wind uplift.

C. Remove protective materials immediately before acceptance.

D. Repair damage.

- - - E N D - - -

3. Document and distribute meeting minutes to participants to record decisions affecting installation.

4. Employs full-time supervisors experienced installing specified system and able to communicate with Contracting Officer's Representative and installer's personnel.