07 52 16.11 Cold Adhesive STY Modified Bituminous Membrane Roofing.pdf

Lexington VAMC July 7, 2021 Correct Various Mechanical System Deficiencies Addendum 02 Lexington, KY Project No. 596A4-19-102

07 52 16.11 - 1

SECTION 07 52 16.11

COLD ADHESIVE STYRENE-BUTADIENE-STYRENE MODIFIED BITUMIOUSE MEMBRANE ROOFING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Modified bituminous sheet roofing and base flashing installed using cold-applied adhesive on new construction with smooth surface with applied solar reflective coating.

2. Repairs and alteration work, including temporary roofs.

1.2 RELATED WORK

A. Section 01 81 13, SUSTAINABLE CONSTRUCTION REQUIREMENTS: Non-Flooring

Adhesives and Sealants VOC Limits.

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

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

1.3 APPLICABLE PUBLICATIONS

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

B. American National Standards Institute/Single-Ply Roofing Institute

(ANSI/SPRI):

FX-1-01(R2006)..........Standard Field Test Procedure for Determining the Withdrawal Resistance of Roofing Fasteners.

C. American Society of Civil Engineers/Structural Engineering Institute

(ASCE/SEI):

7-16....................Minimum Design Loads for Buildings and Other

Structures.

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

Engineers, Inc. (ASHRAE):

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

Residential Buildings.

E. ASTM International (ASTM):

C1370-00(2012)..........Determining Chemical Resistance of Aggregates for Use in Chemical-Resistant Sulfur Polymer

Cement Concrete and Other Chemical-Resistant

Polymer Concretes.

C1371-15................Determination of Emittance of Materials Near

Room Temperature Using Portable Emissometers.

07 52 16.11 - 2

C1549-16................Determination of Solar Reflectance Near Ambient

Temperature Using a Portable Solar

Reflectometer.

D146/D146M-04(2012)e1...Sampling and Testing Bitumen-Saturated Felts and Woven Fabrics for Roofing and

Waterproofing.

D1644-01(2017)..........Nonvolatile Content of Varnishes.

D2523/D2523M-13(2019)e1.Testing Load-Strain Properties of Roofing

Membranes.

D4073/D4073M-06(2019)e1.Tensile-Tear Strength of Bituminous Roofing

Membranes.

D4263-83(2018)..........Indicating Moisture in Concrete by the Plastic

Sheet Method.

D4586/D4586M-07(2018)...Asphalt Roof Cement, Asbestos Free.

D4601/D4601M-04(2020....)Asphalt-Coated Glass Fiber Base Sheet Used in

Roofing.

D4897/D4897M-16.........Asphalt Coated Glass Fiber Venting Base Sheet

Used in Roofing.

D5147/D5147M-18.........Sampling and Testing Modified Bituminous Sheet

Material.

D5201-05a(2014).........Calculating Formulation Physical Constants of

Paints and Coatings.

D6162/D6162M-16.........Styrene Butadiene Styrene (SBS) Modified

Bituminous Sheet Materials Using a Combination of Polyester and Glass Fiber Reinforcements.

D6163/D6163M-16.........Styrene Butadiene Styrene (SBS) Modified

Bituminous Sheet Materials Using Glass Fiber

Reinforcements.

D6164/D6164M-16.........Styrene Butadiene Styrene (SBS) Modified

Bituminous Sheet Materials Using Polyester

Reinforcements.

D6511/D6511M-18.........Solvent Bearing Bituminous Compounds.

E108-20a................Fire Tests of Roof Coverings.

E408-13(2019)...........Total Normal Emittance of Surfaces Using

Inspection-Meter Techniques.

E1918-16................Measuring Solar Reflectance of Horizontal and

Low-Sloped Surfaces in the Field.

07 52 16.11 - 3

E1980-11(2019)..........Calculating Solar Reflectance of Horizontal and

Low-Sloped Opaque Surfaces.

F. Cool Roof Rating Council (CRRC):

1-20....................Product Rating Program.

G. National Roofing Contractors Association (NRCA):

Manual-19...............The NRCA Roofing Manual: Membrane Roof Systems.

H. U.S. Department of Agriculture (USDA):

BioPreferred® Program Catalog.

I. UL LLC (UL):

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

1897-20.................Uplift Tests for Roof Covering Systems.

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

Technology (NIST):

DOC PS 1-19.............Structural Plywood.

DOC PS 2-18.............Performance Standard for Wood-Based

Structural-Use Panels.

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

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

Bulk Building Materials.

Energy Star.............ENERGY STAR Program Requirements for Roof

Products Version 3.0.

1.4 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. Architect/Engineer.

c. Contractor.

d. Installer.

e. Other installers responsible for adjacent and intersecting work, including roof deck, flashings, roof specialties, roof accessories, utility penetrations, rooftop curbs and equipment, lightning protection.

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

a. Installation schedule.

b. Installation sequence.

07 52 16.11 - 4

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.

1.5 SUBMITTALS

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

B. Submittal Drawings:

1. Roofing membrane layout.

2. Roofing membrane fastener pattern and spacing.

3. Roofing membrane seaming and joint details.

4. Roof membrane penetration details.

5. Base flashing and termination details.

C. Manufacturer's Literature and Data:

1. Description of each product.

2. Minimum fastener pullout resistance.

3. Installation instructions.

4. Warranty.

D. Sustainable Construction Submittals:

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

2. Biobased Content:

a. Show type and quantity for each product.

3. Low Pollutant-Emitting Materials:

a. Show volatile organic compound types and quantities.

4. Energy Star label for roofing membrane.

E. Certificates: Certify products comply with specifications.

1. Fire and windstorm classification.

2. High wind zone design requirements.

3. Energy performance requirements.

F. Qualifications: Substantiate qualifications comply with specifications.

07 52 16.11 - 5

1. Installer, including supervisors with project experience list.

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

G. Field quality control reports.

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

I. Operation and Maintenance Data:

1. Maintenance instructions.

1.6 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 or independent roofing inspector.

2. Individual certified by Roof Consultants Institute as Registered

Roof Observer.

1.7 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.

1.8 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.

07 52 16.11 - 6

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

1.9 FIELD CONDITIONS

A. Environment:

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

48 hours before installation.

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

1.10 WARRANTY

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

Construction."

B. Manufacturer's Warranty: Warrant roofing system against material and manufacturing defects and agree to repair any leak caused by a defect in the roofing system materials or workmanship of the installer.

1. Warranty Period: 20 years.

PART 2 - PRODUCTS

2.1 SYSTEM DESCRIPTION

A. Roofing System: Modified bituminous sheet roofing and base flashing installed using cold-applied adhesive on new construction with smooth surface with applied solar reflective coating.

2.2 SYSTEM PERFORMANCE

A. Design roofing system meeting specified performance:

1. Load Resistance: ASCE/SEI 7; Design criteria:

a. Uplift Pressures:

1) Corner Uplift Pressure: 2.64 kPa/square meter (55 per square foot).

2) Perimeter Uplift Pressure: 3.98 kPa/ square meter (83 per square foot).

3) Field-of-Roof Uplift Pressure: 6.37 kPa/ square meter (133 per square foot).

2. Energy Performance:

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.

07 52 16.11 - 7

d. Three-Year Aged Performance: Minimum 0.55 solar reflectance tested in according to ASTM C1549 or ASTM E1918, and minimum 0.75 thermal emittance tested in according to ASTM C1371 or ASTM E408.

1) Where tested aged values are not available:

a) Calculate compliance adjusting initial solar reflectance according to ASHRAE 90.1.

b) Provide roofing system with minimum 64 three-year aged

Solar Reflectance Index calculated according to ASTM E1980 with 12 watt/square meter/degree K (2.1 BTU/hour/ square foot) convection coefficient.

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): 2.67 kN

(600 pound force) cross machine direction, minimum; 4.0 to 5.5 percent elongation at break.

2.3 PRODUCTS - GENERAL

A. Basis of Design: GAF Tri-Ply.

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.

3. Low Pollutant-Emitting Materials: Comply with VOC limits specified in Section 01 81 13, SUSTAINABLE CONSTRUCTION REQUIREMENTS for the following products:

a. Non-flooring adhesives and sealants.

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.

07 52 16.11 - 8

B. Base Sheet: ASTM D4897/D4897M, Type II, venting, nonperforated and as approved by modified bitumen roof membrane manufacturer.

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

1. Breaking Strength, minimum, ASTM D146/D146M: cross machine direction, 21.0 kN/meter (120 pound force/inch).

2. Tear Strength, minimum, ASTM D4073: cross machine direction, 880 N

(200 pound force).

3. Pliability, 12.7 mm (1/2 inch) radius bend, ASTM D146/D146M: No failures.

D. Membrane Ply Sheet: ASTM D6163/D6163M or ASTM D6164/D6164M, Grade S, Type II or III, glass-fiber-reinforced, SBS/SEBS-modified asphalt sheet, or ASTM D6162/D6162M, Grade S, Type II or III, SBS/SEBS-modified asphalt sheet; smooth surfaced; with the following minimum properties:

1. Tensile Strength at 23 degrees C (73 degrees F), minimum, cross machine direction, ASTM D5147/D5147M: 21 kN/meter (120 pound force/inch).

2. Tear Strength at 23 degrees C (73 degrees F), minimum, cross machine direction, ASTM D5147/D5147M: 890 N (200 pound force).

3. Elongation at 23 degrees C (73 degrees F), minimum, cross machine direction, at 5 percent maximum load ASTM D5147/D5147M: 40 percent.

E. Membrane Cap Sheet: ASTM D6163/D6163M or ASTM D6164/D6164M, Grade G, Type II, glass-fiber-reinforced, SBS/SEBS/SIS modified asphalt sheet;

granular surfaced; and as follows:

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

2. Tensile Strength at 23 degrees C (73 degrees F), minimum, cross machine direction, ASTM D5147/D5147M: 24 kN/meter (140 pound force

/inch).

3. Tear Strength at 23 degrees C (73 degrees F), minimum, cross machine direction, ASTM D5147/D5147M: 880 N (200 pound force).

4. Elongation at 23 degrees C (73 degrees F), minimum, cross machine direction, at 5 percent maximum load ASTM D5147/D5147M: 40 percent.

5. Low Temperature Flex, maximum, ASTM D5147/D5147M: -31 degrees C

(-25 degrees F).

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

07 52 16.11 - 9

G. Base Flashing Sheet: ASTM D6164/D6164M, Grade G, Type II, polyester-reinforced, SBS-modified asphalt sheet; with granular surface; Granule Color: White.

2.5 ADHESIVE AND ASPHALT 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. Water-Based Asphalt Primer: Water-based, polymer modified, asphalt primer with the following physical properties:

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

C. Cold-Applied Adhesive for Sheet Membrane: One-part, asbestos-free, low-volatile organic compound, 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 D6511/D6511M: 75 percent.

3. Uniformity and Consistency, ASTM D6511/D6511M: Pass.

D. 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 D6511/D6511M: 75 percent.

3. Uniformity and Consistency, ASTM D6511/D6511M: Pass.

E. Roof Cement: ASTM D4586/D4586M, Type II.

2.6 FASTENERS

A. Roofing Fasteners: Coated, corrosion-resistant steel fasteners and metal or plastic plates, where applicable, tested by fastener manufacturer for required uplift resistance, and recommended by roofing manufacturer for application.

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

2.7 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.

07 52 16.11 - 10

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 firestopped.

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 work day.

B. Dry out surfaces including roof deck flutes 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.

2. Prime concrete decks, including precast units, with 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. Insulating Concrete Decks:

1. Allow to dry out minimum five days after installation before installing roofing materials.

07 52 16.11 - 11

2. If rain occurs during or at end of drying period or during installation of roofing, allow additional drying time before the placement of the roofing materials.

G. Poured Gypsum Decks: Dry out poured gypsum according to manufacturer's instructions before application of roofing materials.

H. 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.

07 52 16.11 - 12

B. Comply with NRCA Manual installation instructions.

C. Comply with ASCE 7-16 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, and as glaze coat where required.

C. Membrane Sheets:

1. Number of Plies: Two, minimum, including base sheet and cap sheet, and additional plies as required to meet load/strain properties specified in Part 2 of this Section.

2. Begin laying sheets at the low points.

3. Roll sheets into cold-applied adhesive brushing down to firmly embed, free of wrinkles, fishmouths, blisters, bubbles, voids, air pockets or other defects that prevent complete adhesion.

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

D. Roofing on Nailable Decks:

1. On insulating concrete, install one ply of venting base sheet with mineral aggregate surface down, nailed to deck with lap as specified and seal lap edges with roof cement. Terminate venting base sheet as follows:

a. At vertical surfaces: Extend venting base sheet up vertical surface over cants to top of base flashing or curb.

b. At roof edge under gravel stops install venting base sheet over blocking: Extend base sheet minimum50 mm (2 inches) beyond outer edge and turn down so that venting can be accomplished.

07 52 16.11 - 13

c. At roof edge over fascia-cant: Extend base sheet over top of cant and turn down over outer face of cant to permit venting at the edge.

2. On poured gypsum, precast gypsum plank, cement-wood fiber plank, wood plank, or plywood decks install one layer of building paper followed by base sheet.

a. Apply building paper lapping ends and edges 50 mm (2 inches), lay smoothly without buckles or wrinkles. Staple or nail sufficiently to hold in place until roof membrane is installed.

b. One ply of venting base sheet. Lay base sheet down dry on deck, Nail as specified. Lap as specified and seal lap edges with roof cement.

E. 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 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.

07 52 16.11 - 14

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 100 mm (4 inches) out on the roofing, and the second ply 75 mm (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 cement.

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

3.7 APPLICATION OF COATING

A. Apply coating on cap sheet when required to meet solar reflectance performance requirements.

B. Apply coating to membrane and base flashings according to manufacturer's instructions by spray or roller.

C. Provide dry film thickness of minimum 0.5 mm (20 mils).

3.8 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.

07 52 16.11 - 15

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.

3.9 FIELD QUALITY CONTROL

A. Field Inspections:

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

01 45 29, TESTING LABORATORY SERVICES.

1. Fastener Pull Out Tests: ANSI/SPRI FX-1; one test for every

230 square meter (2,500 square feet) of deck. Perform tests for each combination of fastener type and roof deck type before installing roof insulation.

a. Test at locations selected by Contracting Officer's

Representative.

b. Do not proceed with roofing work when pull out resistance is less than manufacturer's required resistance.

c. Test Results:

1) Repeat tests using different fastener type or use additional fasteners achieve pull out resistance required to meet specified wind uplift performance.

2) Patch cementitious deck to repair areas of fastener tests holes.

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

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

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

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

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

6. Cut samples perpendicular to seams.

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

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

07 52 16.11 - 16

9. 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 initial installation, installation in progress, and completed work.

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.

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 - - -