07 22 00 Roof and Deck Insulation-1111(Nov).pdf

IDIQ ROOF MAINTENANCE/REPAIR/REPLACEMENT VNVP 111080

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November 2011

07 22 00

ROOF AND DECK INSULATION

PART 0 – INTENT:

0.1 This guide specification covers the requirements for insulation materials used below built-up roofing and single ply roofing systems.

PART 1 - GENERAL:

1.1. REFERENCES: The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM C 1177/C 1177M (2008) Standard Specification for Glass Mat Gypsum

Substrate for Use as Sheathing

ASTM C 1289 (2008) Standard Specification for Faced Rigid Cellular

Polyisocyanurate Thermal Insulation Board

ASTM C 552 (2007) Standard Specification for Cellular Glass Thermal Insulation

ASTM C 726 (2005e1) Mineral Fiber Roof Insulation Board

ASTM C 728 (2005) Perlite Thermal Insulation Board

ASTM D 2178 (2004) Asphalt Glass Felt Used in Roofing and Waterproofing

ASTM D 226/D 226M (2009) Standard Specification for Asphalt-Saturated

Organic Felt Used in Roofing and Waterproofing

ASTM D 312 (2000; R 2006) Standard Specification for Asphalt Used in Roofing

ASTM D 41 (2005) Asphalt Primer Used in Roofing, Dampproofing, and

Waterproofing

ASTM D 4586 (2007) Asphalt Roof Cement, Asbestos-Free

ASTM D 4601 (2004) Asphalt-Coated Glass Fiber Base Sheet Used in Roofing

ASTM D 4897/D 4897M (2001; R 2009) Asphalt-Coated Glass-Fiber Venting

Base Sheet Used in Roofing

FM GLOBAL (FM)

FM 4470 (1986; R 1992) Class I Roof Covers

FM APP GUIDE (updated on-line) Approval Guide http://www.approvalguide.com/CC_host/pages/public/custom http://www.approvalguide.com/CC_host/pages/public/custom

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FM P9513 (2002) Specialist Data Book Set for Roofing Contractors; contains 1-22

(2001), 1-28 (2002), 1-29 (2002), 1-28R/1-29R (1998), 1-30 (2000), 1-31

(2000), 1-32 (2000), 1-33 (2000), 1-34 (2001), 1-49 (2000), 1-52 (2000), 1-

54 (2001)

UNDERWRITERS LABORATORIES (UL)

UL Bld Mat Dir (2009) Building Materials Directory

1.2. SUBMITTALS: The following shall be submitted in accordance with Section 01 33 00

SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Wood nailers

Tapered roof insulation system; G

Taper cants and crickets

Show location and spacing of wood nailers that are required for securing insulation and for backnailing of roofing felts. Show a complete description of the procedures for the installation of each phase of the system indicating the type of materials, thicknesses, identity codes, sequence of laying insulation, location of ridges and valleys, special methods for cutting and fitting of insulation, and special precautions. The drawings shall be based on field measurements.

SD-03 Product Data

Fasteners, Asphalt; G

Insulation; G

Include minimum thickness of insulation for steel and concrete decks and fastener pattern for insulation on steel decks.

SD-06 Test Reports

Flame spread and smoke developed ratings

Submit in accordance with ASTM E 84.

SD-07 Certificates

Installer qualifications

SD-08 Manufacturer's Instructions

Nails and fasteners

Roof insulation, including field of roof and perimeter attachment requirements.

1.3. MANUFACTURER'S CERTIFICATE: Submit certificate from the insulation manufacturer attesting that the installer has the proper qualifications for installing tapered roof insulation systems. Certificate attesting that the expanded perlite or polyisocyanurate

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November 2011 insulation contains recovered material and showing estimated percent of recovered material.

Certificates of compliance for felt materials.

1.4. QUALITY ASSURANCE:

1.4.1. Insulation on Combustible, Steel, or Concrete Decks: Roof insulation shall have a flame spread rating not greater than 75 and a smoke developed rating not greater than

150, exclusive of covering, when tested in accordance with ASTM E 84. Insulation bearing the UL label and listed in the UL Bld Mat Dir as meeting the flame spread and smoke developed ratings will be accepted in lieu of copies of test reports. Compliance with flame spread and smoke developed ratings will not be required when insulation has been tested as part of a roof construction assembly of the type used for this project and the construction is listed as fire-classified in the UL Bld Mat Dir or listed as Class I roof deck construction in the FM APP GUIDE. Insulation tested as part of a roof construction assembly shall bear UL or FM labels attesting to the ratings specified herein.

1.4.2. Foam Board on Combustible, Steel or Decks: Separate polyurethane insulation from a combustible, or steel deck with a thermal barrier of glass mat gypsum roof board or roof insulation in accordance with the requirements of the UL Bld Mat Dir or the FM

APP GUIDE.

1.5. DELIVERY, STORAGE, AND HANDLING:

1.5.1. Delivery:

1.5.1.1. Deliver materials to site in manufacturer's unopened and undamaged standard commercial containers bearing the following legible information:

a. Name of manufacturer;

b. Brand designation;

c. Specification number, type, and class, as applicable, where materials are covered by a referenced specification; and

d. Asphalt's flashpoint (FP), equiviscous temperature (EVT), and finished blowing temperature (FBT).

1.5.1.2. Deliver materials in sufficient quantity to allow continuity of the work.

1.5.2. Storage and Handling: Store and handle materials in a manner to protect from damage, exposure to open flame or other ignition sources, and from wetting, condensation or moisture absorption. Store in an enclosed building or trailer that provides a dry, adequately ventilated environment. Store felt rolls on ends. For the 24 hours immediately before application of felts, store felts in an area maintained at a temperature no lower than 50 degrees F above grade and having ventilation around all sides. Replace damaged material with new material.

1.6. ENVIRONMENTAL CONDITIONS: Do not install roof insulation during inclement weather or when air temperature is below 40 degrees F and interior humidity is 45 percent or greater, or when there is visible ice, frost, or moisture on the roof deck.

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1.7. PROTECTION OF PROPERTY: Provide protection as specified.

1.7.1. Flame-Heated Equipment: Locate and use flame-heated equipment so as not to endanger the structure or other materials on the site or adjacent property. Do not place flame-heated equipment on the roof. Provide and maintain a fire extinguisher near each item of flame-heated equipment.

1.7.2. Protective Coverings: Install protective coverings at paving and building walls adjacent to hoist and kettles prior to starting the work. Lap protective coverings at least

6 inches, secure them against wind, and vent them to prevent collection of moisture on the covered surfaces. Keep protective coverings in place for the duration of the work with asphalt products.

1.7.3. Special Protection: Provide special protection approved by the insulation manufacturer, or avoid heavy traffic on completed work when ambient temperature is above 80 degrees F.

1.7.4. Drippage of Bitumen: Seal joints in and at edges of deck as necessary to prevent drippage of asphalt into building or down exterior walls.

PART 2 - PRODUCTS:

2.1. INSULATION:

2.1.1. Insulation Types: Roof insulation shall be one or an assembly of a maximum of three of the following materials and compatible with attachment methods for the specified insulation and roof membrane:

a. Expanded Perlite Board: ASTM C 728. Minimum 3/4 inch thick when both top and bottom surfaces will be in contact with asphalt.

b. Polyisocyanurate Board: ASTM C 1289, Type I -- foil faced both sides or Type

II, fibrous felt or glass mat membrane both sides, except minimum compressive strength shall be 20 pounds per square inch (psi).

c. Composite Boards: ASTM C 1289, Type III, perlite insulation: board faced one side, fibrous felt or glass fiber mat membrane on other side or Type V, oriented strand board or waferboard on one side and fibrous felt or glass fiber mat membrane or aluminum foil on the other. ASTM C 1289 (Polyisocyanurate-perlite).

d. Cellular Glass Boards: ASTM C 552, Type IV.

2.1.2. Mineral-Fiber Insulation Board: ASTM C 726.

2.1.3. Recovered Materials: Provide thermal insulation materials containing recycled materials to the extent practical. The required minimum recycled material content for the listed materials are:

Perlite Composition Board: 23 percent postconsumer paper

Polyisocyanurate/polyurethane: 9 percent recovered material

Phenolic Rigid Foam: 5 percent recovered material

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Wood Fiberboard 5 percent recovered material

2.1.4. Insulation Thickness: As necessary to provide a thermal resistance (R value) for average thickness of tapered system. Thickness shall be based on the "R" value for aged insulation. Insulation over steel decks shall satisfy both specified R value and minimum thickness for width of rib opening recommended in insulation manufacturer's published literature.

2.1.5. Tapered Roof Insulation: One layer of the tapered roof insulation assembly shall be factory tapered to a slope of not less than 1/4 or 1/2 inch per foot. Provide starter and filler blocks as required to provide the total thickness of insulation necessary to meet the specified slope and thermal conductance. Mitered joints shall be factory fabricated and shall consist of two diagonally cut boards or one board shaped to provide the required slopes. Identify each piece of tapered insulation board by color or other identity coding system, allowing the identification of different sizes of tapered insulation board required to complete the roof insulation system.

2.1.6. Cants and Tapered Edge Strips: Provide preformed cants and tapered edge strips of the same material as the roof insulation; or, when roof insulation material is unavailable, provide pressure-preservative treated wood, wood fiberboard, or rigid perlite board cants and edge strips as recommended by the roofing manufacturer, unless otherwise indicated. Face of cant strips shall have incline of 45 degrees and vertical height of inches. Taper edge strips at a rate of one to 1 1/2 inch per foot down to approximately 1/8 inch thick.

2.2. PROTECTION BOARD: For use as a thermal barrier (underlayment), fire barrier

(overlayment), or protection board for hot-mopped, torched-down, or adhesively-applied roofing membrane over roof insulation.

2.2.1. Glass Mat Gypsum Roof Board: ASTM C 1177/C 1177M, 0 Flame Spread and 0

Smoke Developed when tested in accordance with ASTM E 84, 500 psi, Class A, non-combustible, 1/2 inch thick, 4 by 8 feet board size.

2.3. BITUMENS:

2.3.1. Asphalt Primer: ASTM D 41.

2.3.2. Asphalt: ASTM D 312, Type III or IV. Asphalt flash point, finished blowing temperature, and equiviscous temperature (EVT) for mop and for mechanical spreader application shall be indicated on bills of lading or on individual containers.

2.3.3. Asphalt Roof Cement: ASTM D 4586, Type I for horizontal surfaces and for surfaces sloped from 0 to 3 inches per foot, Type II for vertical and surfaces sloped more than 3 inches per foot.

2.4. SHEATHING PAPER FOR WOOD DECKS: Rosin-sized building paper or unsaturated felt weighing not less than 5 pounds per 100 square feet.

2.5. MOISTURE CONTROL:

2.5.1. Vapor Retarder :

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2.5.1.1. Asphalt-Saturated Felt Base Sheet for Single Layer Application: ASTM D

4601, weighing not less than 35 pounds per 100 square feet.

2.5.1.2. Asphalt-Coated Glass Felt: ASTM D 2178, Type IV or VI.

2.5.2. Ventilating Felt for Concrete Decks: ASTM D 4897/D 4897M, Type II, non-perforated, with spot mopping holes where specified.

2.5.3. Organic Roofing: ASTM D 226/D 226M, Type I.

2.6. FASTENERS: Flush-driven through flat round or hexagonal steel or plastic plates.

Steel plates shall be zinc-coated, flat round not less than 1 3/8 inch diameter or hexagonal not less than 28 gage. Plastic plates shall be high-density, molded thermoplastic with smooth top surface, reinforcing ribs and not less than 3 inches in diameter. Fastener head shall recess fully into the plastic plate after it is driven. Plates shall be formed to prevent dishing.

Do not use bell-or cup-shaped plates. Fasteners shall conform to insulation manufacturer's recommendations except that holding power, when driven, shall be not less than 120 pounds each in steel deck. Fasteners for steel or concrete decks shall conform to FM APP GUIDE for Class I roof deck construction, and shall be spaced to withstand an uplift pressure of 90 pounds per square foot.

2.6.1. Roofing Nails for Wood Decks: Barbed 11 gage, zinc-coated nails with 7/16 to

5/8 inch diameter heads or annular ring shank, square head, one-piece composite nails.

Nails shall be long enough to penetrate wood deck at least 5/8 inch but shall not protrude through underside of decking.

2.6.2. Fasteners for Plywood Decks: Annular ring shank, square head, one-piece composite nails long enough to penetrate into plywood decks approximately 1/2 inch but not protrude through underside of decking.

2.6.3. Fasteners for Steel Decks: Approved hardened penetrating fasteners or screws conforming to FM 4470 and listed in FM APP GUIDE for Class I roof deck construction. Quantity and placement to withstand a minimum uplift pressure of 90 psf conforming to FM APP GUIDE.

2.6.4. Fasteners for Poured Concrete Decks Approved hardened fasteners or screws to penetrate deck at least one inch but not more than 1 1/2 inches, conforming to FM 4470, and listed in FM APP GUIDE for Class I roof deck construction. Quantity and placement to withstand an uplift pressure of 90 psf conforming to FM APP GUIDE.

2.7. WOOD NAILERS: Pressure-preservative-treated as specified in Section 06 10 00

ROUGH CARPENTRY.

PART 3 - EXECUTION:

3.1. EXAMINATION AND PREPARATION:

3.1.1. Surface Inspection: Surfaces shall be clean, smooth, and dry. Surfaces receiving vapor retarder shall be free of projections which might puncture the vapor retarder.

Check roof deck surfaces, including surfaces sloped to roof drains and outlets, for defects before starting work. The Contractor and Contracting Officer will inspect and

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November 2011 approve the surfaces immediately before starting installation. Prior to installing vapor retarder or insulation, perform the following:

a. Examine wood decks to ascertain that deck boards have been properly nailed and that exposed nail heads have been set.

b. Examine steel decks to ensure that panels are properly secured to structural members and to each other and that surfaces of top flanges are flat or slightly convex.

c. Examine precast concrete decks to ensure that joints between precast units are properly grouted and leveled to provide suitable surfaces for installation of vapor retarder and insulation.

d. In the presence of the Contracting Officer perform the following surface-dryness test on concrete substrates:

(1) Foaming: When poured on the deck, one pint of asphalt when heated in the range of 350 to 400 degrees F, shall not foam upon contact.

(2) Strippability: After asphalt used in the foaming test application has cooled to ambient temperatures, test coating for adherence. Should a portion of the sample be readily stripped clean from surface, do not consider surface to be dry and do not start application. Should rain occur during application, stop work and do not resume until surface has been tested by method above and found dry.

3.1.2. Surface Preparation: Correct defects and inaccuracies in roof deck surface to eliminate poor drainage and hollow or low spots and perform the following:

a. Install wood nailers the same thickness as insulation at eaves, edges, curbs, walls, and roof openings for securing cant strips, gravel stops, gutters, and flashing flanges. On decks with slopes of one inch per foot or more, install wood nailers perpendicular to slope for securing insulation. Space nailers in accordance with approved shop drawings.

b. Fill or cover cracks or knot holes larger than 1/2 inch in diameter in wood decks as necessary to form an unyielding surface.

c. Cover wood decks with a layer of rosin-sized building paper or unsaturated felt.

Lap sides and ends not less than 3 inches. Nail sufficiently to prevent tearing or buckling during installation.

d. Cover steel decks with a layer of insulation board of sufficient thickness to span the width of a deck rib opening, and conforming to fire safety requirements. Secure with piercing or self-drilling, self-tapping fasteners of quantity and placement conforming to FM APP GUIDE. Insulation joints parallel to ribs of deck shall occur on solid bearing surfaces only, not over open ribs.

e. Solidly apply asphalt primer to concrete decks at the rate of one gallon per 100 square feet of roof surface, stopping approximately 4 inches from joints. Allow primer to dry thoroughly. Place felt strips, 4 inches or more in width, over joints, 2

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November 2011 inches on each side, between precast concrete units in a heavy coating of cold-applied asphalt roof cement.

3.2. INSTALLATION OF VAPOR RETARDER: Install vapor retarder in direct contact with roof deck surface. Vapor retarder shall consist of two plies of No. 15 asphalt-saturated felt, two plies of asphalt-coated glass felt, or one layer of asphalt-saturated felt base sheet.

Lay vapor retarder at right angles to direction of slope. Install first ply of felt or base sheet as specified herein for the specific deck. Apply second ply of 2-ply vapor retarder system using asphalt at rate of 20 to 35 lbs per 100 square feet, applied within plus or minus 25 degrees F of EVT. Do not heat asphalt above asphalt's FBT or 525 degrees F, whichever is less. Use thermometers to check temperatures during heating and application. Side and end laps shall be completely sealed. Asphalt shall be visible beyond all edges of each ply as it is being installed. Plies shall be laid free of wrinkles, buckles, creases or fishmouths. Workers shall not walk on mopped surfaces when the asphalt is sticky. Press out air bubbles to obtain complete adhesion between surfaces. At walls, eaves and rakes, and other vertical surfaces, the vapor retarder organic felts shall be extended 9 inches, or separate organic felt plies shall be extended 9 inches, with not less than 9 inches on the substrate, and the extended portion turned back and mopped in over the top of the insulation. At roof penetrations other than walls, eaves and rakes, and vertical surfaces, the vapor retarder or separate plies shall be extended 9 inches to form a lap which shall later be folded back over the edge of the insulation. Asphalt roof cement shall be used under the vapor retarder for at least 9 inches from walls, eaves, rakes and other penetrations.

3.2.1. Vapor Retarder on Poured Concrete Decks: Solidly mop primed substrate with asphalt at rate of 20 to 35 lbs per 100 square feet before installing vapor retarder. Lay first ply of 2 ply system with each sheet lapping 19 inches over the preceding sheet. Lap ends not less than 4 inches. Stagger laps a minimum of 12 inches. For a vapor retarder consisting of one layer of asphalt base sheet, provide side and end laps not less than 4 inches. Stagger laps a minimum of 12 inches. Cement base sheets together with a solid mopping of asphalt.

3.2.2. Vapor Retarder on Precast Concrete Decks: Solidly mop primed substrate with asphalt at rate of 20 to 35 lbs per 100 square feet before installing vapor retarder. Lay first ply of 2 ply system with each sheet lapping 19 inches over preceding sheet. Lap ends not less than 4 inches. Stagger laps a minimum of 12 inches. For vapor retarder consisting of one layer of asphalt base sheet, provide side and end laps not less than 4 inches and stagger laps a minimum of 12 inches. Cement base sheets together with a solid mopping of asphalt.

3.2.3. Vapor Retarder on Wood Decks: Lay first ply of 2 ply system dry with each sheet lapping 2 inches over the preceding sheet. Lap ends not less than 4 inches. Stagger laps a minimum of 12 inches. Nail felt at 6 inch intervals along side laps and install two rows of nails approximately 11 inches apart down longitudinal center of each sheet, with nails staggered at 18 inches O.C. For vapor retarder consisting of one layer of asphalt base sheet, lap each sheet 4 inches over the preceding sheet. Provide end laps not less than 4 inches and stagger laps a minimum of 12 inches. Cement side and end laps together with solid mopping of asphalt or heavy coat of asphalt roof cement. Nail

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November 2011 side laps at 6 inch intervals. Apply asphalt mopping at rate of 20 to 35 lbs per 100 square feet. Install two rows of nails approximately 11 inches apart down longitudinal center of each sheet, with nails staggered at 18 inches O.C.

3.2.4. Vapor Retarder on Steel Decks: Solidly mop the mechanically secured insulation surface with asphalt before installing vapor retarder. For a 2 ply vapor retarder, install each sheet lapping 19 inches over the preceding sheet. Lap ends not less than 4 inches.

Stagger the laps a minimum of 12 inches. Cement felts together with solid mopping of asphalt. Apply asphalt moppings at rate of 20 to 35 lbs per 100 square feet. For a vapor retarder consisting of one layer of asphalt base sheet, lap each sheet 4 inches over preceding sheet. Lap ends not less than 4 inches, and stagger laps a minimum of 12 inches. Cement base sheets together with solid mopping of asphalt.

3.2.5. Over Gypsum Insulating Concrete or Lightweight Insulating concrete: One ply of venting inorganic base sheet shall be laid, without mopping, at right angle to the slope with 4 inch side laps and 6 inch end laps. Laps shall be bonded with hot asphalt.

End laps shall be staggered. Base sheet shall be attached to the concrete as determined by uplift requirements. The 2-ply vapor retarder shall then be applied over the base sheet as specified above.

3.2.6. Over Concrete Decks and First Layer of Insulation on Steel Decks: The 2-ply vapor retarder shall be applied as specified above except that venting inorganic base sheet shall be deleted.

3.2.7. Over Structural Concrete on Non-Venting Support: One ply of venting inorganic base sheet with mopping holes shall be laid dry at right angle to the slope with 4 inch side laps and 6 inch end laps. The vapor retarder shall then be applied as specified.

3.3. INSTALLATION OF VENTILATING FELT: Apply ventilating felt in accordance with manufacturer's printed instructions. Extend over roof cants, up vertical surfaces and terminate under cap flashing; at roof edges terminate under outside edge of perimeter edge nailers or under gravel stop fascia.

3.4. INSULATION INSTALLATION: Apply insulation in two layers with staggered joints when total required thickness of insulation exceeds 1/2 inch. Lay insulation so that continuous longitudinal joints are perpendicular to direction of felts for the built-up roofing, and end joints of each course are staggered with those of adjoining courses. when using multiple layers of insulation, joints of each succeeding layer shall be parallel and offset in both directions with respect to layer below. Keep insulation 1/2 inch clear of vertical surfaces penetrating and projecting from roof surface.

3.4.1. Installation Using Asphalt: When a vapor retarder is required, firmly embed each layer in solid asphalt mopping; mop only sufficient area to provide complete embedment of one board at a time. Provide 20 to 35 lbs of asphalt per 100 square feet of roof deck for each layer of insulation. Apply asphalt when temperature is within plus or minus 25 degrees F of EVT. Do not heat asphalt above asphalt's FBT or 525 degrees F, whichever is less, for longer than 4 consecutive hours. Use thermometers to check temperatures during heating and application.

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3.4.2. Installation Using Asphalt on Steel Decks: When a vapor retarder is not required, secure first layer of insulation and thermal barrier to deck with piercing or self-drilling, self-tapping fasteners. Engage fasteners by driving them through insulation into top flange of steel deck. Use driving method prescribed by fastener manufacturer.

Insulation joints parallel to ribs of deck shall occur on solid bearing surfaces only, not over open ribs. Secure succeeding layers with solid asphalt moppings. Where insulation is applied over steel deck, long edge joints shall continuously bear on surfaces of the steel deck. Insulation which can be readily lifted after installation is not considered to be adequately secured. Insulation shall be applied so that all roof insulation applied each day is waterproofed the same day. Phased construction will not be permitted.

Application of impermeable faced insulation shall be performed without damage to the facing.

3.4.3. Installation Using Only Mechanical Fasteners: Secure total thickness of insulation with penetrating type fasteners.

3.4.4. Special Precautions for Installation of Foam Insulation

3.4.4.1. Polyisocyanurate Insulation: Where polyisocyanurate foam board insulation is provided, install 1/2 inch thick wood fiberboard, glass mat gypsum roof board, or 3/4 inch thick expanded perlite board insulation over top surface of foam board insulation. Stagger joints of insulation with respect to foam board insulation below.

3.4.5. Cant Strips: Where indicated, provide cant strips at intersections of roof with walls, parapets, and curbs extending above roof. Wood cant strips shall bear on and be anchored to wood blocking. Fit cant strips flush against vertical surfaces. Where possible, nail cant strips to adjoining surfaces. Where cant strips are installed against non-nailable materials, install in heavy mopping of asphalt or set in a heavy coating of asphalt roof cement.

3.4.6. Tapered Edge Strips: Where indicated, provide edge strips in the right angle formed by junction of roof and wood nailing strips that extend above level of roof.

Install edge strips flush against vertical surfaces of wood nailing strips. Where possible, nail edge strips to adjoining surfaces. Where installed against non-nailable materials, install in heavy mopping of asphalt or set in heavy coating of asphalt roof cement.

3.5. PROTECTION:

3.5.1. Protection of Applied Insulation: Completely cover each day's installation of insulation with the finished roofing on same day. Do not permit phased construction.

Protect open spaces between insulation and parapets or other walls and spaces at curbs, scuttles, and expansion joints, until permanent roofing and flashing are applied. Do not permit storing, walking, wheeling, or trucking directly on insulation or on roofed surfaces. Provide smooth, clean board or plank walkways, runways, and platforms near supports, as necessary, to distribute weight. Exposed edges of the insulation shall be protected by cutoffs at the end of each work day or whenever precipitation is imminent.

Cutoffs shall be 2 layers of bituminous-saturated felt set in plastic bituminous cement.

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Fill all profile voids in cut-offs to prevent entrapping of moisture into the area below the membrane. Cutoffs shall be removed when work is resumed.

3.5.2. Damaged Work and Materials: Restore work and materials that become damaged during construction to original condition or replace with new materials.

3.6. INSPECTION: The Contractor shall establish and maintain an inspection procedure to assure compliance of the installed roof insulation with the contract requirements. Any work found not to be in compliance with the contract shall be promptly removed and replaced or corrected in an approved manner. Quality control shall include, but not be limited to, the following:

a. Observation of environmental conditions; number and skill level of insulation workers; start and end time of work.

b. Verification of certification, listing or label compliance with FM P9513.

c. Verification of proper storage and handling of insulation and vapor retarder materials before, during, and after installation.

d. Inspection of vapor retarder application, including edge envelopes and mechanical fastening.

e. Inspection of mechanical fasteners; type, number, length, and spacing.

f. Coordination with other materials, cants, sleepers, and nailing strips.

g. Inspection of insulation joint orientation and laps between layers, joint width and bearing of edges of insulation on deck.

h. Installation of cutoffs and proper joining of work on subsequent days.

i. Continuation of complete roofing system installation to cover insulation installed same day.

- - End of Section- -

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