Attch_2_-_Volume_3_-_TYMX160008-_Technical_Specifications.pdf

VOLUME 3

APPENDIX B

TECHNICAL SPECIFICATIONS

FA3016-16-R-0035 Attachment 2

VOLUME II

SECTION 07 21 16 ROOF AND DECK INSULATION Page 1 of 16

SECTION 07 22 00

ROOF AND DECK INSULATION

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 C1177/C1177M (2013) Standard Specification for Glass

Mat Gypsum Substrate for Use as Sheathing

ASTM C1289 (2014) Standard Specification for Faced Rigid Cellular

Polyisocyanurate Thermal Insulation Board

ASTM C208 (2012) Cellulosic Fiber Insulating Board

ASTM C552 (2013) Standard Specification for Cellular

Glass Thermal Insulation

ASTM C578 (2014) Standard Specification for Rigid, Cellular

Polystyrene Thermal Insulation

ASTM C726 (2012) Mineral Fiber Roof Insulation Board

ASTM C728 (2013) Perlite Thermal Insulation Board

ASTM D2178/D2178M (2013a) Asphalt Glass Felt Used in Roofing and

Waterproofing

ASTM D226/D226M (2009) Standard Specification for Asphalt-

Saturated Organic Felt Used in Roofing and

ASTM D312 (2000; R 2006) Standard Specification for

Asphalt Used in Roofing

ASTM D41/D41M (2011) Asphalt Primer Used in Roofing, Dampproofing, and Waterproofing

ASTM D4263 (1983; R 2012) Indicating Moisture in

Concrete by the Plastic Sheet Method

SECTION 07 21 16 ROOF AND DECK INSULATION Page 2 of 16

ASTM D4586/D4586M (2007; E 2012; R 2012) Asphalt Roof Cement, Asbestos-Free

ASTM D4601/D4601M (2004; R 2012) Asphalt-Coated Glass Fiber

Base Sheet Used in Roofing

ASTM D4897/D4897M (2001; R 2009) Standard Specification for Asphalt-

Coated Glass-Fiber Venting Base Sheet Used in Roofing

ASTM E84 (2014) Standard Test Method for Surface Burning

Characteristics of Building Materials

FM GLOBAL (FM)

FM 4470 (2010) Single-Ply, Polymer-Modified Bitumen Sheet, Built-up Roof (BUR), and Liquid Applied Roof Assemblies for Use in Class 1 and Noncombustible Roof Deck Construction

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

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)

SCIENTIFIC CERTIFICATION SYSTEMS (SCS)

SCS Scientific Certification Systems

(SCS)Indoor Advantage

U.S. GREEN BUILDING COUNCIL (USGBC)

LEED NC (2009) Leadership in Energy and Environmental Design(tm) New Construction Rating System

UL ENVIRONMENT (ULE)

ULE Greenguard UL Greenguard Certification Program

UNDERWRITERS LABORATORIES (UL)

SECTION 07 21 16 ROOF AND DECK INSULATION Page 3 of 16

UL Bld Mat Dir (2012) Building Materials Directory

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation; submittals not having a "G" designation are for information only. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

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.

Product Data

Fasteners Asphalt; G Insulation; G Certification

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

Test Reports

Flame spread and smoke developed ratings

Submit in accordance with ASTM E84.

Certificates Installer qualifications

Manufacturer's Instructions

Nails and fasteners

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

1.3 MANUFACTURER'S CERTIFICATE

SECTION 07 21 16 ROOF AND DECK INSULATION Page 4 of 16

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 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 E84. 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 and Steel Decks

Separate polyurethane or polystyrene 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

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).

SECTION 07 21 16 ROOF AND DECK INSULATION Page 5 of 16

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. 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.

1.7 PROTECTION OF PROPERTY

Provide protection as specified in SECTION 07 51 13 BUILT UP ASPHALT

ROOFING.

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 C 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

SECTION 07 21 16 ROOF AND DECK INSULATION Page 6 of 16

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 C728. Minimum 3/4 inch thick when both top and bottom surfaces will be in contact with asphalt.

b. Polyisocyanurate Board: ASTM C1289 Type I -- foil faced both sides or Type II, fibrous felt or glass mat membrane both sides, except minimum compressive strength shall be 140 kPa 20 pounds per square inch (psi).

c. Composite Boards: ASTM C1289, Type III, perlite insulation board faced one side, fibrous felt or glass fiber mat membrane on other side. 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 C1289 (Polyisocyanurate-perlite).

d. Cellular Glass Boards: ASTM C552, Type IV.

e. Polystyrene Board: Shall be in accordance with ASTM C578, Type II, IV, or X.

f.Wood Fiberboard: ASTM C208[, high density], except 4 by 4 feet maximum board size.

ASTM C208 Type II, Grade 1 or 2, roof insulating board, treated with sizing, wax or bituminous impregnation. Bituminous impregnation shall be limited to 4 percent by weight when used over steel decks. Maximum board size: 4 feet by 4 feet.

2.1.2 Mineral-Fiber Insulation Board

ASTM C726.

2.1.3 Recovered Materials

Not used.

2.1.4 Insulation Thickness

As necessary to provide a thermal resistance (R value) of 16 or more 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

SECTION 07 21 16 ROOF AND DECK INSULATION Page 7 of 16 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 one in 24, 48, 1/4, or 1/2 inch per foot (as required). 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 oftapered 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 4 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 C1177/C1177M, 0 Flame Spread and 0 Smoke Developed when tested in accordance with ASTM E84, 3450 kPa 500 psi, Class A, non-combustible, 1/4, 1/2 or 5/8 inch thick (as required), 4 by 8 feet board size.

2.2.2 [High Density Wood Fiber

Provide improved impact resistance to roof covers, but is hydroscopic in nature.

High density fiber board shall be Grade 2 in accordance with ASTM C208 with a transverse load of 53.4 N 12 lbf.

2.3 BITUMENS

2.3.1 Asphalt Primer

ASTM D41/D41M.

SECTION 07 21 16 ROOF AND DECK INSULATION Page 8 of 16

2.3.2 Asphalt

ASTM D312, 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 D4586/D4586M, 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 5 pounds per 100 square feet.

2.5 MOISTURE CONTROL

2.5.1 Vapor Retarder

2.5.1.1 Asphalt-Saturated Felt Base Sheet for Single Layer Application

ASTM D4601/D4601M, weighing not less than 35 pounds per 100 square feet.

2.5.1.2 Asphalt-Coated Glass Felt

ASTM D2178/D2178M, Type IV VI.

2.5.2 Ventilating Felt for Poured and Precast Concrete Decks

ASTM D4897/D4897M, Type II, non-perforated, with spot mopping holes where specified.

2.5.3 Organic Roofing

ASTM D226/D226M, 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 shallbe 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

SECTION 07 21 16 ROOF AND DECK INSULATION Page 9 of 16 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 178 N 40 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 115 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 13 mm 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 115 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 115 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.

SECTION 07 21 16 ROOF AND DECK INSULATION Page 10 of 16

The Contractor shall inspect and approve the surfaces immediately before starting installation. Prior to installing vapor retarder ventilating felt 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 ventilating felt 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 176 to 204 degrees C 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.

e. Prior to installing any roof system on a concrete deck, conduct a test per ASTM

D4263. The deck is acceptable for roof system application when there is no visible moisture on underside of plastic sheet after 24 hours.

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 in 12 one inch per foot or more, install wood nailers perpendicular to slope for securing insulation [and for backnailing of roofing felts. Space nailers in accordance with approved shop drawings.

SECTION 07 21 16 ROOF AND DECK INSULATION Page 11 of 16

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 poured precast concrete decks at the rate of one gallon per 100 square feet of roof surface, stopping approximately 4 inches from joints between the precast concrete units. Allow primer to dry thoroughly. Place felt strips, 4 inches or more in width, over joints, 2 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, ventilating felt or insulation (as required). Vapor retarder shall consist of either 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

SECTION 07 21 16 ROOF AND DECK INSULATION Page 12 of 16

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 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 100 mm 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 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

SECTION 07 21 16 ROOF AND DECK INSULATION Page 13 of 16 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 nailed 9 inches on centers at side laps and in 2 rows 11 inches apart down the center of the sheet with nails 18 inches on centers and staggered 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, spot-mopped with asphalt to concrete deck. 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, as specified in Section, 07 51 13 BUILT-UP ASPHALT ROOF, 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

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.

3.4.2 Installation Using Asphalt on Steel Decks

SECTION 07 21 16 ROOF AND DECK INSULATION Page 14 of 16

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.

3.4.4.2 Polystyrene Insulation

a. Over top surface of non-composite polystyrene board, install 1/2 inch thick high density wood fiberboard, 3/4 inch thick expanded perlite board, glass mat gypsum roof board, or other overlayment approved by roofing sheet manufacturer. Tightly butt and stagger joints of field applied overlayment board at least 6 inches with respect to the polystyrene board below. Apply 6 inch wide glass fiber roofing tape centered over joints and edges of overlayment board.

b. Where composite boards consisting of polystyrene insulation are provided, apply 6 inch wide glass-fiber roofing tape centered over joints and edges of composite board. Apply joint strips as recommended by roofing sheet manufacturer.

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, SECTION 07 21 16 ROOF AND DECK INSULATION Page 15 of 16 install in heavy mopping of asphalt or set in a heavy coating of asphalt roof cement an approved adhesive.

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 an approved adhesive.

3.5 PROTECTION

3.5.1 Protection of Applied Insulation

Completely cover each day's installation of insulation with the finished roofing specified in applicable roofing specification 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 to conform to indicated live load limits of roof construction. 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 or single ply or EPDM membrane set in roof cement. 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.

SECTION 07 21 16 ROOF AND DECK INSULATION Page 16 of 16

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 07 22 00--

SECTION 07 32 14 CLAY TILE ROOFING REPLACEMENT OR REPAIR Page 1 of 13

SECTION 07 32 14

CLAY TILE ROOFING REPLACEMENT OR REPAIR

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 B370 (2012) Standard Specification for

CopperSheet and Strip for Building Construction

ASTM C1167 (2011) Standard Specification for

Clay Roof Tiles

ASTM C1184 (2013) Standard Specification for Structural Silicone Sealants

ASTM D146/D146M (2004; E 2012; R 2012) Sampling and Testing Bitumen-

Saturated Felts and Woven Fabrics for Roofing and

ASTM D226/D226M (2009) Standard Specification for Asphalt-Saturated

Organic Felt Used in Roofing and Waterproofing

ASTM D412 (2006a; R 2013) Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers - Tension

ASTM D4586/D4586M (2007; E 2012; R 2012) Asphalt Roof

Cement, Asbestos-Free

NATIONAL ROOFING CONTRACTORS ASSOCIATION (NRCA)

NRCA RoofMan (2011 thru 2014) The NRCA Roofing Manual

SHEET METAL AND AIR CONDITIONING CONTRACTORS' NATIONAL

ASSOCIATION (SMACNA)

SMACNA 1793 (2012) Architectural Sheet Metal Manual, 7th Edition

1.2 SUBMITTALS

SECTION 07 32 14 CLAY TILE ROOFING REPLACEMENT OR REPAIR Page 2 of 13

Government approval is required for submittals with a "G" designation; submittals not having a "G" designation are for information only. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

Shop Drawings

Clay Tile Roofing Systems

Drawings showing clay tile installation and appearance details, flashing details, and fastening details for the tiles.

Product Data

Clay Tile Roofing Systems

Manufacturer's catalog data and installation instructions. Qualifications

Documentation showing qualifications of personnel proposed to perform the roofing work, and a listing identifying prior installations completed by the Contractor.

Samples

Clay Roofing Tile

One representative tile of each type.

Sealant

8 ounces of each type.

Underlayment Membrane

1 by 1 foot section of each type.

Fasteners Representative samples of each fastener with identifying tags.

Certificates Materials

Certificates of compliance attesting that the materials meet specification

1.3 QUALIFICATIONS

The Contractor shall provide qualified workers, trained and experienced in installing clay tile roofing systems of this configuration, and shall submit documentation of 5 consecutive years of work of this type. The Contractor shall be familiar with and shall perform work in accordance with SMACNA 1793. A list of installations shall be provided which identifies when, where, and for whom the installations were made.

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1.4 DELIVERY, STORAGE AND HANDLING

Materials shall be delivered in manufacturer's unopened bundles and containers with the manufacturer's brand and name marked clearly thereon. Tiles shall be stored in accordance with manufacturer's printed instructions. Roll goods shall be stored on end in an upright position. Immediately before laying, roofing felt shall be stored for 24 hours in an area maintained at a temperature not lower than 50 degrees F.

1.5 PROJECT/SITE CONDITIONS

1.5.1 Environmental Requirements

Clay tile roofing work shall proceed when existing and forecasted weather conditions permit work to be performed in accordance with manufacturer's recommendations and warranty

1.5.2 Material Storage

Materials shall not be stored on roof decks in such a manner as to overstress and/or damage the deck and supporting structure. Placing of loads at midspans of framing shall be avoided. Superimposed loads shall be well distributed.

1.5.3 Units of Work

Units of work shall be established, including removal of existing materials, preparation of existing surfaces and application of underlayment and nailers, and related temporary and/or permanent flashing so that it can be completed prior to the end of each working day.

1.5.4 Temporary Protection Materials

Materials shall be provided and maintained on the site at all times for temporary roofing, flashing, and other protection when delays and/or changed weather conditions do not permit completion of each unit of work prior to the end of each working day. Materials which have been used for temporary roofing, flashing and other protection shall be removed and discarded.

1.6 WARRANTY

A material and labor warranty shall be furnished against defects in material and workmanship that affect the appearance, leak resistance, and attachment of clay tile roof assembly, including related metal flashing for a period of 10 years from date of final acceptance of the work. Warranty shall also cover the blow-off at wind gusts up to, and including, 115 hour mph.

PART 2 PRODUCTS

2.1 MATERIALS

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2.1.1 Existing Clay Tile

Intact and serviceable existing clay tiles shall be salvaged and reused whenever possible.

New clay tiles being incorporated into existing clay tile roofs shall match existing as closely as possible. Clay tiles from the same manufacturer as the original shall be used if possible.

2.1.2 Clay Roofing Tile

Clay roofing tile shall be minimum Grade 1 tile conforming to ASTM C1167. Tile shall be one-piece barrel, two-piece barrel, flat shingle, interlocking shingle (as indicated per task order) type in the following pattern: as indicated. Tile shall be glazed, unglazed as indicated).

2.1.2.1 Colors

Clay tile color shall be coordinated with the base historical department prior to selection.

2.1.2.2 Fittings

Clay tile fittings shall be of the following types as required by manufacturer's instructions:

eave - eave closure or under eave; gable - end band or gable rake; ridge – ridge or closed ridge end or ridge/hip terminal; hip - cut hip or hip roll or hip starter or ridge/hip terminal;

valley - cut valley or closed valley.

2.1.3 Underlayment Membrane

An underlayment membrane shall be furnished on surfaces to be covered with tile.

Membrane shall consist of asphalt-saturated felt or high strength composite self-adhering membrane as indicated.

2.1.3.1 Roofing Felt

Roofing felt shall be asphalt-saturated rag felt, Type II, No. 30 asphalt felt in accordance with ASTM D226/D226M.

2.1.3.2 Elastomeric Membrane Underlayment

Elastomeric membrane shall be a cold applied composite self-adhering membrane, minimum 0.004 inch thick, high strength polyethylene film with slip resistant embossing, coated on one side with a thick layer of adhesive-consistency rubberized asphalt, interwound with a disposable silicone coated release sheet. The tensile strength and elongation values shall be not less than 250 psi when tested in accordance with ASTM D412 and pliability shall be unaffected when tested in accordance with ASTM D146/D146M.

2.1.3.3 Elastomeric Membrane Accessories

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Two component urethane, mastic and primer shall be as approved by the membrane manufacturer. Flashing, expansion joint covers, temporary UV protection and corner fillets shall be as recommended by the membrane manufacturer.

2.1.4 Fasteners

2.1.4.1 Nails

Nails shall be solid copper, Number 11 gauge nails, minimum 5/16 inch head. Nails shall be of sufficient length to adequately penetrate the roof sheathing.

2.1.4.2 Miscellaneous Fasteners

Miscellaneous fasteners may include but are not limited to: wind locks, hurricane clips, tile attachment brackets, tile nails, twisted wire (tile-tie), deck anchor systems, and flashing cleats. Fasteners shall be made of solid copper (wind locks and hurricane clips can be made of stainless steel).

2.1.5 Flashing

Flashing shall be 20 ounce, light cold-rolled temper (H00) copper conforming to ASTM B370. Like metals shall be used on all components of fastening systems and flashing in order to avoid galvanic action. Flashing shall be in accordance with the requirements as specified in Section 07 60 00 FLASHING AND SHEET METAL.

2.1.6 Plastic Cement

Plastic cement for gable rakes, hip rolls, ridges, stringers and other conditions shall be non-running, heavy body plastic cement composed of ingredients complying with

ASTM D4586/D4586M.

2.1.7 Sealant

Sealant, when used in lieu of plastic cement, shall be silicone in accordance with

ASTM C1184.

2.1.8 Mortar

Mortar for filling the openings of cut valley tiles shall consist of 1 part portland cement to 3 parts damp plaster sand, and shall be colored to the nearest possible match with the color of the tile.

2.1.9 Wood Strips

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Wood strips for nailers, battens, cant strips, and eave strips shall be of foundation grade redwood or preservative treated Douglas fir. Sizes and lengths shall be provided per tile manufacturer's installation details.

PART 3 EXECUTION

3.1 PROTECTION OF ROOF SURFACES

Equipment (such as padded ridge ladders) and techniques shall be used which prevent damage to roof as a result of foot or material traffic. Contractor shall be responsible for controlling breakage of new or existing tile beyond what is indicated. The progression of work shall be laid out and presented to the Contracting Officer to prevent other trades from working on or above completed roofing. Personnel who are working on the roof shall have proper shoes which will not further damage tiles and shoe soles shall be made of a material which will aid in preventing falls.

3.2 TILE REMOVAL

Where work involves partial replacement or repair of roof, Contractor shall verify each tile for tightness and continued use. Tiles which have been identified for replacement or re-installation shall be marked for approval within 30 days of Notice to Proceed. Tiles identified for removal shall be marked with a non-destructive color mark which can be easily removed. Tiles fastened with non-copper fasteners shall be re-fastened with proper copper fasteners.

3.3 PREPARATION OF SURFACES

Roof deck surfaces shall be smooth, clean, firm, dry, and free from loose boards, large cracks, and projecting ends that might damage the roofing. Foreign particles shall be cleaned from all interlocking areas to ensure proper seating and to prevent water damming. Prior to installation of tile, vents and other projections through roofs shall be properly flashed and secured in position, and projecting nails shall be driven firmly home.

3.4 ROOFING FELT

3.4.1 Standard Application

Felt shall be laid in horizontal layers on deck areas to be covered with tile. Two layers of No. 30 felt shall be applied. Two layers shall be run down valley, ridges, and hips.

Applications shall be doubled on rough surfaces and overlapped 12 inches on hips, valleys, and ridges. Membranes lapping valley felts shall be set in mastic. Joints shall be lapped 2- 1/2 inches horizontally and 6 inches vertically. Felt shall be carried 6 inches up vertical surfaces and 4 inches over gutters. Edges shall be fastened with corrosion-resistant, 12 gauge, 3/8 inch head standard roofing nails on 6 inch centers. Felt shall be preserved unbroken.

3.4.2 Special Applications

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Low pitch roofs shall have two layers of felt installed and shall be solidly mopped between felt layers and on top of felt layers with 25 pounds per square of hot asphalt.

3.5 ELASTOMERIC MEMBRANE UNDERLAYMENT

3.5.1 Surface Preparation

Dust, dirt, loose nails or other protrusions shall be removed. Priming is not required for wood or metal surfaces but is necessary on concrete or masonry surfaces.

3.5.2 Primer

Primer shall be applied at a coverage rate of 250-350 sq. ft./gal.. Primer shall be applied by spray or paint roller.

3.5.3 Temperature

Membrane shall be applied only in fair weather when air and surface temperatures are above 40 degrees F.

3.5.4 Membrane Application

Membrane shall be applied according to manufacturer's instructions. Membrane shall be adhered directly to roof deck. Pine wood decks shall be covered with minimum 1/4 inch plywood prior to receiving membrane coverage. Membrane shall be cut into 10 to 15 foot lengths and shall be re-rolled. The release paper shall be peeled back 1 to 2 feet and the membrane shall be aligned on the lower edge of the roof and the first 1 to 2 feet shall be placed. The release paper under the membrane shall be pulled and peeled from the membrane. The membrane shall be pressed in place. Lower edges shall be rolled firmly with a wallpaper or hand roller. For ice dam protection, membrane shall be applied to reach a point above the highest expected level of ice dams. Ends and edges shall be overlapped a minimum of 6 inches. Membrane shall not be folded onto an exposed face of the roof edge.

3.5.5 Valley and Ridge Application

The membrane shall be cut into 4 to 6 foot lengths. The release paper shall be peeled and the sheet centered over the valley or ridge, draped and pressed in place working from the center of the valley or ridge outward in each direction. For valleys, membrane shall be applied starting at the low point and working upwards. Sheets shall overlap a minimum of 6 inches.

3.5.6 Vertical Membrane Flashings

Vertical wall installations shall receive primer prior to the application of membrane. Primer shall be applied at a coverage rate of 250-350 sq. ft./gal.. Membrane shall be turned up walls and dormers as indicated on the drawings. Vertical membrane terminations shall be

SECTION 07 32 14 CLAY TILE ROOFING REPLACEMENT OR REPAIR Page 8 of 13 mechanically fastened. Vertical terminations shall receive a troweling of mastic as approved by the membrane manufacturer. Membrane may be folded onto the fascia, provided it will be covered by a gutter metal edge or other material.

3.5.7 Protection

Elastomeric membrane underlayment shall not be left permanently exposed to sunlight.

Membrane shall be covered with exposed roofing materials as soon as possible. Membrane damaged due to exposure to sunlight shall be patched prior to the application of final roof covering.

3.6 METAL FLASHING

Metal flashing shall be as shown at intersections of vertical or projecting surfaces through the roof or against which the roof abuts, such as walls, parapets, dormers, and sides of chimneys. Flashing installation shall be in accordance with Section 07 60 00 FLASHING

AND SHEET METAL.

3.7 CLAY ROOFING TILE (GENERAL)

3.7.1 Repair and Replacement

Existing reusable clay tiles removed from the repair area shall be intermingled with new clay tiles to provide a smooth visual transition between new and existing areas.

3.7.2 High or Low Slope Pitches

Tiles on roof slopes of less than 3:12 shall be applied over indicated underlayment on solid decking. and on extremely steep or vertical applications, shall have the butt of each tile set with mastic or sealant, and placed where it will not be seen. The mastic or sealant shall not stain the surface of the tile. Copper "hurricane clips" may be installed instead of using mastic or sealant.

3.7.3 Roof Decks and Fasteners

Tile shall be fastened to roof deck materials as follows:

DECK FASTENER

Plywood Slater's ring shank nail. Point shall just penetrate through underside of deck.

Plank board Slater's plain shank nail, at least 25 m 1 inch or more in 37 mm 1-1/2 inch thickness shall not penetrate deck.

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Gypsum plank or Nailable Concrete

Stainless steel or silicone bronze nails with spiral threads, 37 or 50 mm 1-1/2 or 2 inch long. Nail shall penetrate deck at least 1/2 thickness but no more than 3/4. Underside of deck shall not be penetrated. If deck material is old and excessively hard, smooth shank shall be used.

Metal Sheet metal screw and mastic

Fibrous cement Tile-tie system

Note: All fastening and flashing metals shall be of like material in order to avoid galvanic action.

3.7.4 Poured Concrete Deck

Poured concrete decks shall have embedded 1 by 2 inch beveled wood strips, extending from eave to ridge, spaced 20 inches on centers. Concrete shall be smooth and flush with strips. Felts weighing 50 lbs. per 100 square feet shall be fastened with lath nailed over embedded strips. Twenty five by One by 2 inch wood strips, spaced to suit tile, shall be applied horizontally across lath. Tile shall then be laid as directed for a sheathed roof.

3.7.5 Chalk Lines

Horizontal and vertical guide lines shall be chalked on the membrane to assure proper appearance. The chalk lines shall be spaced by measuring the delivered tiles for average length and width exposures. An exposure length of 1/4 inch beyond the average shall not be exceeded.

3.8 ONE-PIECE BARREL TILE APPLICATION

3.8.1 Wood Strips

Wood stringers, 1 inch wide and of proper height, shall be applied on hips and ridges to carry hip roll and ridge. A 1 by 2 inch strip shall be applied for end bands. A 1 by 2 inch cant strip shall be applied at eaves if eave closures are not specified.

3.8.2 Tile Application

a. Eave closures shall be installed first.

b. Tiles shall be laid to straight lines parallel to ground level and shall be lapped 3 inches vertically.

c. Each tile shall be fastened with the quantity of nails, wind locks and/or hurricane clips recommended by the manufacturer for the specified roof slope, building height, and wind velocity.

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d. Nails on tiles overlapping sheet metalwork shall not puncture the sheet metal.

Tiles overlapping sheet metal shall be fastened with copperwire and plastic cement.

e. Gable rakes shall be cemented to field tiles and fastened with nails.

f. Hip rolls shall be cemented in laps and fastened with 2 inch copper nails.

g. Ridges shall be cemented and fastened with 2-1/2 inch copper nails in laps and where they rest on roof tiles.

h. Where tiles join hip stringers they shall be made waterproof with flashing cement.

i. When hip starter and closed ridge end fittings have not been specified, the voids at ends of hips and ridges shall be filled with mortar colored to nearest match of tile color.

j. Tile in contact with cement mortar shall be immersed in water for at least 2 minutes before laying.

k. When ridge angles and hip/ridge terminals are not otherwise specified, they shall be mitered on job, nailed or wired, and set in plastic cement.

l. When short course tiles are not otherwise specified for rafters which do not accommodate full courses, they shall be cut and drilled on job by roofer unless a plus or minus 1 inch adjustment of regular tile overhang at eave is sufficient.

3.9 TWO-PIECE BARREL TILE APPLICATION

3.9.1 Wood Strips

Wood stringers, 1 inch wide and of proper height, shall be applied on hips and ridges to carry hip roll and ridge. A 1 by 3-1/2 inch strip shall be applied and spaced appropriately for covers.