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v
<br />Sheet Metal Manual." Provide concealed fasteners where possible, and set units true to line and level as indicated. Install
<br />work with laps, joints, and seams that will be permanently watertight and weather resistant.
<br />3. Provide elbows at base of downspouts to direct water away from building.
<br />4. Tie downspouts to underground drainage system indicated.
<br />3.4 CLEANING AND PROTECTION
<br />A. Remove temporary protective coverings and strippable films, if any, as metal wall panels are installed, unless otherwise indicated
<br />in manufacturer's written installation instructions. On completion of metal wall panel installation, clean finished surfaces as rec-
<br />ommended by metal wall panel manufacturer. Maintain in a clean condition during construction.
<br />B. After metal wall panel installation, clear weep holes and drainage channels of obstructions, dirt, and sealant.
<br />END OF SECTION 07412
<br />SECTION 07511 - BUILT-UP ASPHALT ROOFING
<br />PART 1 - GENERAL
<br />1.1 SUMMARY
<br />A. This Section includes built-up asphalt roofing systems.
<br />1.2 SUBMITTALS
<br />A. Product Data: For each product indicated.
<br />B. Shop Drawings: Include plans, elevations, sections, details, and attachments to other Work.
<br />C. Samples: For each product included in roofing system.
<br />D. Insulation Compliance Certificate. Submit certificate showing that insulation and R value complies with RIC/TIMA bulletin 281-
<br />1.
<br />1.3 QUALITY ASSURANCE
<br />A. Installer Qualifications: A qualified installer, approved by manufacturer to install manufacturer's products.
<br />B. Source Limitations: Obtain components for roofing system approved by roofing system manufacturer.
<br />C. Fire -Test -Response Characteristics: Provide roofing materials with the fire -test -response characteristics indicated as determined
<br />by testing identical products per test method below by UL, FMG, or another testing and inspecting agency acceptable to authorities
<br />having jurisdiction.
<br />1. Exterior Fire -Test Exposure: Class A; ASTM E 108, for application and roof slopes indicated.
<br />1.4 WARRANTY
<br />A. Special Warranty: Manufacturer's standard form, without monetary limitation, in which manufacturer agrees to repair or replace
<br />components of roofing system that fail in materials or workmanship within 20 years from date of Substantial Completion. Failure
<br />includes roof leaks. Provide minimum total number of plies indicated regardless of whether roof system can meet warranty with a
<br />number less than specified.
<br />PART 2 - PRODUCTS
<br />2.1 MANUFACTURERS
<br />A. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated
<br />into the Work include, but are not limited to, the following:
<br />B. Manufacturers: Subject to compliance with requirements, provide products by one of the following:
<br />1. Built-up Asphalt Roofing:
<br />a. CertainTeed Corporation.
<br />b. Firestone Building Products Company.
<br />C. GAF Materials Corporation.
<br />d. TAMKO Roofing Products, Inc.
<br />2.2 ROOFING MEMBRANE PLIES
<br />A. Ply Sheet: ASTM D 2178, Type IV asphalt -impregnated, glass -fiber felt.
<br />2.3 FLASHING MATERIALS
<br />A. Backer Sheet: ASTM D 2178, Type IV, asphalt -impregnated, glass -fiber felt.
<br />B. Flashing Sheet: ASTM D 6222, Type I or II, polyester -reinforced, APP-modified asphalt sheet; mineral -granule surfaced; and as
<br />follows:
<br />1. Granule Color: White
<br />2.4 ASPHALT MATERIALS
<br />A. Asphalt Primer: ASTM D 41.
<br />B. Roofing Asphalt: ASTM D 312, Type II, III or IV as recommended by built-up roofing system manufacturer for application.
<br />2.5 AUXILIARY ROOFING MEMBRANE MATERIALS
<br />A. General: Auxiliary materials recommended by roofing system manufacturer for intended use and compatible with built-up roof-
<br />ing.
<br />B. Asphalt Roofing Cement: ASTM D 4586, asbestos free, of consistency required by roofing system manufacturer for application.
<br />C. Cold -Applied Adhesive: Roofing system manufacturer's standard asphalt -based, one- or two-part, asbestos -free, cold -applied
<br />adhesive specially formulated for compatibility and use with built-up roofing base flashings.
<br />D. Fasteners: Factory -coated steel fasteners and metal or plastic plates meeting corrosion -resistance provisions in FM 4470; designed
<br />for fastening roofing membrane components to substrate; tested by manufacturer for required pullout strength; and acceptable to
<br />roofing system manufacturer.
<br />E. Aggregate Surfacing: ASTM D 1863, No. 6 or No. 67, clean, dry, opaque, water -worn gravel or crushed stone, free of sharp
<br />edges.
<br />2.6 ROOF INSULATION - DOUBLE LAYER
<br />A. General: Insulation types specified are for a double layer system and are separated according to deck types and group according
<br />to layer. The two layers of selected insulation shall have a combined total heat aged "R"value equal to 17.9 minimum.
<br />1. First Layer - Polyisocyanurate Board Insulation: ASTM C 1289, Type II, felt or glass -fiber mat facer on both major sur-
<br />faces, 2.0 lbs/cu. Ft. minimum, 2.2 to 2.3 inch thickness..
<br />2. Second Layer - Contractors Option #1. Perlite Board Insulation: ASTM C 728; composed of expanded perlite, cellulosic
<br />fibers, binders, and waterproofing agents with top surface seal -coated, 3/4 thickness.
<br />3. Second Layer - Contractors Option #2. Glass -Fiber -Board Insulation: ASTM C 726, combining glass fibers with thermo-
<br />setting resin binders, faced on one side with asphalt -coated fiberglass scrim and kraft paper, 3/a" thickness.
<br />B. Tapered Insulation: Provide factory -tapered insulation boards fabricated to slope of 1/4 inch per 12 inches (1:48), unless otherwise
<br />indicated.
<br />C. Provide preformed saddles, crickets, tapered edge strips, and other insulation shapes where indicated for sloping to drain. Fabri-
<br />cate to slopes indicated.
<br />2.7 INSULATION ACCESSORIES
<br />A. Fasteners: Factory -coated steel fasteners and metal or plastic plates meeting corrosion -resistance provisions in FMG 4470,
<br />designed for fastening roof insulation to substrate, and acceptable to roofing system manufacturer.
<br />B. Cold Fluid -Applied Adhesive: Manufacturer's standard cold fluid -applied adhesive formulated to adhere roof insulation to sub-
<br />strate.
<br />C. Insulation Cant Strips: ASTM C 728, perlite insulation board.
<br />D. Tapered Edge Strips: ASTM C 728, perlite insulation board.
<br />2.8 WALKWAYS
<br />A. Walkway Pads: Mineral -granule -surfaced, reinforced asphaltic composition, slip -resisting pads, manufactured as a traffic pad for
<br />foot traffic and acceptable to roofing system manufacturer, 3/8 inch (9 mm) thick, minimum.
<br />1. Pad Size: Manufacturer's Standard Size
<br />2. Location: Pad to be located around all mechanical of rooftop equipment, connecting all mechanical or rooftop equipment,
<br />and paths to the vertical roof access point, or as additionally indicated on plans.
<br />PART 3 - EXECUTION
<br />3.1 SUBSTRATE INSPECTION. Examine substrate surfaces to receive built-up roofing system and associated work and condi-
<br />tions roofing will be installed. Do not proceed with roofing until unsatisfactory has been corrected in a manner acceptable to the
<br />installer. The commencement of work on a section of roof will indicate acceptance by the installer and he will be responsible for
<br />any corrective work that may be occasioned by his having started over an unsatisfactory surface. Verify that the substrate complies
<br />with the following:
<br />1. Top Flanges: No concavity or convexity in excess of 1/16" across any adjacent flanges
<br />2. Side Laps: Properly nested and mechanically fastened at maximum spacing of 3'-0" o.c.
<br />3. End Laps: Minimum 2" laps located over and fastened to supports
<br />4. Deck secured to each supporting member in every other rib. (maximum spacing 12" o.c.) with puddle welds or approved
<br />mechanical fasteners.
<br />3.2 INSULATION INSTALLATION
<br />A. Coordinate installing roofing system components so insulation is not exposed to precipitation or left exposed at the end of the
<br />workday. Fastening to comply with wind load requirements of authority having jurisdiction.
<br />B. Comply with roofing system manufacturer's written instructions for installing roof insulation.
<br />1. First Layer. Attach with FM approved screw -type fasteners with plates (minimum one fastener per every two square feet of
<br />insulation or per insulation manufacturers recommendation, whichever is more stringent. Lay Units in each layer with long
<br />joints continuous and short joints staggered
<br />2. Second Layer. Install over first layer. Embed in full mopping of hot (EVT) Type II, III, or IV asphalt. Overlap all joints to
<br />a minimum of 12" each direction.
<br />C. Install tapered insulation under area of roofing to conform to slopes indicated.
<br />D. Install boards to moderate contact without forcing joints. Cut boards to fit neatly to perimeter blocking and around roof penetra-
<br />tions. Fill joints over 3/8" wide with Perlite insulation.
<br />E. Cut and replace broken corner and damaged boards with newly cut insulation pieces.
<br />3.3 ROOFING MEMBRANE INSTALLATION
<br />A. Install built-up roofing membrane system according to roofing system manufacturer's written instructions and applicable recom-
<br />mendations of ARMA/NRCA's "Quality Control Guidelines for the Application of Built-up Roofing."
<br />B. Where roof slope exceeds 1 inch per 12 inches (1: 12), install sheets of built-up roofing membrane parallel with slope.
<br />C. Substrate -Joint Penetrations: Prevent roofing asphalt from penetrating substrate joints, entering building, or damaging roofing
<br />system components or adjacent building construction.
<br />D. Install four ply sheets starting at low point of roofing system. Align ply sheets without stretching. Shingle side laps of ply sheets
<br />uniformly to achieve required number of plies throughout thickness of roofing membrane. Shingle in direction to shed water.
<br />Extend ply sheets over and terminate beyond cants.
<br />1. Embed each ply sheet in a solid mopping of hot roofing asphalt.
<br />E. Aggregate Surfacing: Promptly after installing and testing roofing membrane, base flashing, and stripping, flood -coat roof surface
<br />with 601b/100 sq. ft. of hot roofing asphalt. While flood coat is hot and fluid, cast the following average weight of aggregate in a
<br />uniform course:
<br />1. Aggregate Weight: 400 lb/100 sq. ft.
<br />F. Deficiencies. Repair all membrane deficiencies including voids, bridging, fishmouths, cuts and tears in all affected plies.
<br />G. Valleys and Waterways: Apply an extra roofing ply underneath of sufficient width to extend a minimum of eight inches up each
<br />side of valley or waterway.
<br />H. Cants: Terminate roofing plies 2" above all cant strips.
<br />3.4 FLASHING AND STRIPPING INSTALLATION
<br />A. Install base flashing over cant strips and other sloping and vertical surfaces, at roof edges, and at penetrations through roof, and
<br />secure to substrates according to roofing system manufacturer's written instructions.
<br />B. Extend base flashing up walls or parapets a minimum of 8 inches above roofing membrane and 4 inches onto field of roofing mem-
<br />brane.
<br />C. Mechanically fasten top of base flashing securely at terminations and perimeter of roofing.
<br />D. Install stripping, according to roofing system manufacturer's written instructions, where metal flanges and edgings are set on built-
<br />up roofing.
<br />E. Primer. Prime masonry and concrete walls to receive base flashings with asphalt primer at a rate of gallon per 100 square feet.
<br />F. Fibrated Aluminum Coating. Cover completed base flashing and wall surface covering system with aluminum coating. Apply at a
<br />rate of 1 gallon per 100 square feet. Extend aluminum coating from inside to edge of wall down over base flashing.
<br />3.5 WALKWAY INSTALLATION
<br />A. Walkway Pads: Install walkway pads using units of size indicated or, if not indicated, of manufacturer's standard size according
<br />to walkway pad manufacturer's written instructions.
<br />1. Sweep away loose aggregate surfacing and set walkway pads in additional flood coat of hot roofing asphalt.
<br />B. Cap Sheet Strips: Install cap sheet strips, approximately 36 inches wide and in lengths not exceeding 10 feet, leaving a space of 6
<br />inches between strips. Adhere in hot roofing asphalt.
<br />END OF SECTION 07511
<br />SECTION 07620 - SHEET METAL FLASHING AND TRIM
<br />PART 1 - GENERAL
<br />1.1 SUMMARY
<br />A. This Section includes the following:
<br />1. Manufactured reglets.
<br />2. Formed roof drainage system.
<br />3. Formed low -slope roof flashing and trim.
<br />4. Formed steep -slope roof flashing and trim.
<br />5. Formed wall flashing and trim.
<br />1.2 SUBMITTALS
<br />A. Product Data: For each product indicated.
<br />B. Shop Drawings: Show layouts, profiles, shapes, seams, dimensions, and details for fastening, joining, supporting, and anchoring
<br />sheet metal flashing and trim.
<br />C. Samples: For each type of sheet metal flashing and trim upon request of the Architect.
<br />1.3 QUALITY ASSURANCE
<br />A. Sheet Metal Flashing and Trim Standard: Comply with SMACNA's "Architectural Sheet Metal Manual." Conform to dimensions
<br />and profiles shown unless more stringent requirements are indicated.
<br />PART 2 - PRODUCTS
<br />2.1 MANUFACTURERS
<br />A. In other Part 2 articles where titles below introduce lists, the following requirements apply to product selection:
<br />1. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorpo-
<br />rated into the Work include, but are not limited to, manufacturers specified.
<br />2.2 SHEET METALS
<br />A Aluminum Sheet. ASTM B 209 Alloy 3003 3004 3105or 5005 Temper suitable for forming and structural performance ce
<br />required, but not less than H14, finished as follows:
<br />1. High -Performance Organic Finish: Two -coat, thermocured system containing not less than 70 percent polyvinylidene fluo-
<br />ride resin by weight; complying with AAMA 2604.
<br />a. Color: Match Architect's samples
<br />B. Stainless -Steel Sheet: ASTM A 240/A 240M, Type 304, No. 2D finish.
<br />C Zinc -Coated (Galvanized) Steel Sheet: ASTM A 653/A 653M, G90 (Z275) coating designation; structural quality, mill phospha-
<br />tized for field painting.
<br />D. Lead Sheet: ASTM B 749, Type L51121, copper -bearing lead sheet.
<br />2.3 MISCELLANEOUS MATERIALS
<br />A. General: Provide materials and types of fasteners, solder, welding rods, protective coatings, separators, sealants, and other miscel-
<br />laneous items as required for complete sheet metal flashing and trim installation.
<br />B. Felt Underlayment: ASTM D 226, Type II (No. 30), asphalt -saturated organic felt, nonperforated.
<br />C. Fasteners: Wood screws, annular threaded nails, self -tapping screws, self-locking rivets and bolts, and other suitable fasteners
<br />designed to withstand design loads.
<br />1. Nails for Copper Sheet: Copper or hardware bronze, 0,109 inch (2.8 mm) minimum and not less than 7/8 inch (22 mm)
<br />long, barbed with large head.
<br />2. Exposed Fasteners: Heads matching color of sheet metal by means of plastic caps or factory -applied coating.
<br />3. Fasteners for Flashing and Trim: Blind fasteners or self -drilling screws, gasketed, with hex washer head.
<br />4. Blind Fasteners: High -strength aluminum or stainless -steel rivets.
<br />D. Sealing Tape: Pressure -sensitive, 100 percent solids, polyisobutylene compound sealing tape with release -paper backing. Provide
<br />permanently elastic, nonsag, nontoxic, nonstaining tape.
<br />E. Elastomeric Sealant: ASTM C 920, elastomeric polyurethane polymer sealant; of type, grade, class, and use classifications required
<br />to seal joints in sheet metal flashing and trim and remain watertight.
<br />F. Butyl Sealant: ASTM C 1311, single -component, solvent -release butyl rubber sealant, polyisobutylene plasticized, heavy bodied
<br />for hooked -type expansion joints with limited movement.
<br />G. Epoxy Seam Sealer: Two-part, noncorrosive, aluminum seam -cementing compound.
<br />H. Bituminous Coating: Cold -applied asphalt mastic, SSPC-Paint 12, compounded for 15-mil dry film thickness per coat.
<br />2.4 REGLETS
<br />A. Reglets: Units of type, material, and profile indicated, formed to provide secure interlocking of separate reglet and counterflashing
<br />pieces, and compatible with flashing indicated with factory- mitered and -welded corners and junctions.
<br />1. Manufacturers:
<br />a. Cheney Flashing Company, Inc.
<br />b. Fry Reglet Corporation.
<br />C. Heckmann Building Products Inc.
<br />2. Material: Aluminum, 0.024 inch thick.
<br />2.5 FABRICATION, GENERAL
<br />A. General: Custom fabricate sheet metal flashing and trim to comply with recommendations in SMACNA's "Architectural Sheet
<br />Metal Manual" that apply to design, dimensions, metal, and other characteristics of item indicated. Shop fabricate items where
<br />practicable. Obtain field measurements for accurate fit before shop fabrication.
<br />B. Fabricate sheet metal flashing and trim without excessive oil canning, buckling, and tool marks and true to line and levels indi-
<br />cated, with exposed edges folded back to form hems.
<br />1. Seams for Aluminum: Fabricate nonmoving seams with flat -lock seams. Form seams and seal with epoxy seam sealer.
<br />Rivet joints for additional strength.
<br />2. Seams for Other Than Aluminum: Fabricate nonmoving seams in accessories with flat -lock seams. Tin edges to be seamed,
<br />form seams, and solder.
<br />C. Sealed Joints: Form nonexpansion but movable joints in metal to accommodate elastomeric sealant to comply with SMACNA
<br />recommendations.
<br />D. Expansion Provisions: Where lapped or bayonet -type expansion provisions in the Work cannot be used, form expansion joints of
<br />intermeshing hooked flanges, not less than 1 inch deep, filled with elastom eric sealant concealed within joints.
<br />E. Conceal fasteners and expansion provisions where possible on exposed -to -view sheet metal flashing and trim, unless otherwise
<br />indicated.
<br />F. Fabricate cleats and attachment devices from same material as accessory being anchored or from compatible, noncorrosive metal,
<br />and in thickness not less than that of metal being secured.
<br />2.6 ROOF DRAINAGE SHEET METAL FABRICATIONS
<br />A. Hanging Gutters: Fabricate to cross section indicated, complete with end pieces, outlet tubes, and other accessories as required.
<br />Fabricate in minimum 96-inch-long sections. Furnish flat -stock gutter spacers and gutter brackets fabricated from same metal as
<br />gutters, of size recommended by SMACNA but not less than twice the gutter thickness. Fabricate expansion joints, expansion -
<br />joint covers, gutter bead reinforcing bars, and gutter accessories from same metal as gutters.
<br />1. Fabricate from the following material:
<br />a. Aluminum: 0.040 inch thick.
<br />B. Downspouts: Fabricate rectangular downspouts complete with mitered elbows. Furnish with metal hangers, from same material
<br />as downspouts, and anchors.
<br />1. Fabricate downspouts from the following material:
<br />a. Aluminum: 0.024 thick.
<br />C. Parapet Scuppers: Fabricate scuppers of dimensions required with closure flange trim to exterior, 4-inch- wide wall flanges to inte-
<br />rior, and base extending 4 inches beyond cant or tapered strip into field of roof. Fasten gravel guard angles to base of scupper.
<br />1. Fabricate parapet scuppers from the following material:
<br />a. Aluminum: 0.0320 inch thick.
<br />D. Conductor Heads: Fabricate conductor heads with flanged back and stiffened top edge and of dimensions and shape indicated
<br />complete with outlet tubes and built-in overflows.
<br />1. Fabricate conductor heads from the following material:
<br />a. Aluminum: 0.0320 inch thick.
<br />2.7 LOW -SLOPE ROOF SHEET METAL FABRICATIONS
<br />A. Roof Edge Flashing (Gravel Stop) and Fascia Caps: Fabricate in minimum 96-inch long, but not exceeding 10-foot- long, sections.
<br />Furnish with 6-inch- wide joint cover plates.
<br />1. Fabricate from the following material:
<br />a. Aluminum: 0.050 inch thick.
<br />B. Copings: Fabricate in minimum 96-inch- (2400-mm-) long, but not exceeding 10-foot- (3-m-) long, sections. Fabricate joint
<br />plates of same thickness as copings. Furnish with continuous cleats to support edge of external leg and[ drill elongated holes for
<br />fasteners on] interior leg. Miter corners, seal, and solder or weld watertight.
<br />1. Fabricate copings from the following material:
<br />a. Aluminum: 0.050 inch thick.
<br />C. Base Flashing: Fabricate from the following material:
<br />1. Aluminum: 0.040 inch thick.
<br />D. Counterflashing: Fabricate from the following material:
<br />1. Aluminum: 0.0320 inch > thick.
<br />E. Roof -Penetration Flashing: Fabricate from the following material as indicated on drawings:
<br />1. Lead: 4.0 lb/sq. ft., hard tempered.
<br />F. Roof -Drain Flashing: Fabricate from the following material:
<br />1. Lead: 4.0 lb/sq. ft. , hard tempered.
<br />PART 3 - EXECUTION
<br />3.1 INSTALLATION, GENERAL
<br />A. General: Anchor sheet metal flashing and trim and other components of the Work securely in place, with provisions for thermal
<br />and structural movement. Use fasteners, solder, welding rods, protective coatings, separators, sealants, and other miscellaneous
<br />items as required to complete sheet metal flashing and trim system.
<br />1. Torch cutting of sheet metal flashing and trim is not permitted.
<br />B. Metal Protection: Where dissimilar metals will contact each other or corrosive substrates, protect against galvanic action by paint-
<br />ing contact surfaces with bituminous coating or by other permanent separation as recommended by fabricator or manufacturers of
<br />dissimilar metals.
<br />C. Install exposed sheet metal flashing and trim without excessive oil canning, buckling, and tool marks.
<br />D. Install sheet metal flashing and trim true to line and levels indicated. Provide uniform, neat seams with minimum exposure of
<br />solder, welds, and elastomeric sealant.
<br />E. Install sheet metal flashing and trim to fit substrates and to result in watertight performance. Verify shapes and dimensions of
<br />surfaces to be covered before fabricating sheet metal.
<br />1. Space cleats not more than 12 inches apart. Anchor each cleat with two fasteners. Bend tabs over fasteners.
<br />F. Expansion Provisions: Provide for thermal expansion of exposed flashing and trim. Space movement joints at a maximum of 10
<br />feet with no joints allowed within 24 inches of corner or intersection. Where lapped or bayonet -type expansion provisions cannot
<br />be used or would not be sufficiently watertight, form expansion joints of intermeshing hooked flanges, not less than 1 inch deep,
<br />filled with elastomeric sealant concealed within joints.
<br />G. Fasteners: Use fasteners of sizes that will penetrate substrate not less than 1-1/4 inches for nails and not less than 3/4 inch for wood
<br />screws.
<br />1. Galvanized or Prepainted, Metallic -Coated Steel: Use stainless -steel fasteners.
<br />2. Aluminum: Use aluminum or stainless -steel fasteners.
<br />3. Copper: Use copper or stainless -steel fasteners.
<br />4. Stainless Steel: Use stainless -steel fasteners.
<br />H. Seal joints with elastomeric sealant as required for watertight construction.
<br />I. Soldered Joints: Clean surfaces to be soldered, removing oils and foreign matter. Pretin edges of sheets to be soldered to a width
<br />of 1-1/2 inches except where pretinned surface would show in finished Work.
<br />1. Do not solder aluminum sheet.
<br />3.2 ROOF DRAINAGE SYSTEM INSTALLATION
<br />A. General: Install sheet metal roof drainage items to produce complete roof drainage system according to SMACNA recommenda-
<br />tions and as indicated. Coordinate installation of roof perimeter flashing with installation of roof drainage system.
<br />B. Hanging Gutters: Join sections with riveted and soldered joints or with lapped joints sealed with elastomeric sealant. Provide
<br />for thermal expansion. Attach utters at eave or fascia to firmly anchored utter brackets spaced not more than 36 inches apart.
<br />P g Y g P P
<br />Provide end closures and seal watertight with sealant. Slope to downspouts.
<br />1. Install gutter with expansion joints at locations indicated but not exceeding 50 feet apart. Install expansion joint caps.
<br />2. Install continuous gutter screens on gutters with noncorrosive fasteners, removable for cleaning gutters.
<br />C. Downspouts: Join sections with 1-1/2-inch telescoping joints. Provide fasteners designed to hold downspouts securely 1 inch
<br />away from walls; locate fasteners at top and bottom and at approximately 60 inches o.c. in between.
<br />D. Parapet Scuppers: Install scuppers where indicated through parapet. Continuously support scupper, set to correct elevation, and
<br />seal flanges to interior wall face, over cants or tapered edge strips, and under roofing membrane.
<br />E. Conductor Heads: Anchor securely to wall with elevation of conductor head rim 1 inch (25 mm) below scupper discharge.
<br />3.3 ROOF FLASHING INSTALLATION
<br />A. General: Install sheet metal roof flashing and trim to comply with performance requirements and SMACNA's "Architectural Sheet
<br />Metal Manual." Provide concealed fasteners where possible, set units true to line, and level as indicated. Install work with laps,
<br />joints, and seams that will be permanently watertight.
<br />B. Roof Edge Flashing and Copings: Anchor to resist uplift and outward forces according to recommendations in FMG Loss Preven-
<br />tion Data Sheet 1-49 and the authority having jurisdiction.
<br />C. Counterflashing: Coordinate installation of counterflashing with installation of base flashing. Insert counterflashing in reglets or
<br />receivers and fit tightly to base flashing. Secure in a waterproof manner. Extend counterflashing 4 inches over base flashing. Lap
<br />counterflashing joints a minimum of 4 inches (100 mm) and bed with elastomeric sealant.
<br />D. Roof -Penetration Flashing: Coordinate installation of roof -penetration flashing with installation of roofing and other items pen-
<br />etrating roof. Install flashing as follows:
<br />1. Turn lead flashing down inside vent piping, being careful not to block vent piping with flashing.
<br />2. Seal with elastomeric sealant and clamp flashing to pipes penetrating roof except for lead flashing on vent piping.
<br />END OF SECTION 07620
<br />SECTION 07720 - ROOF ACCESSORIES
<br />PART 1 - GENERAL
<br />1.1 SUMMARY
<br />A. This Section includes the following:
<br />1. Roof curbs.
<br />2. Roof hatches.
<br />1.2 SUBMITTALS
<br />A. Product Data: For each product indicated.
<br />B. Shop Drawings: Include plans, elevations, sections, details, and attachments to other Work.
<br />C. Samples: For each exposed finish upon request of architect.
<br />1.3 QUALITY ASSURANCE
<br />A. Standards: Comply with the following:
<br />1. SMACNA's "Architectural Sheet Metal Manual" details for fabrication of units, including flanges and cap flashing to coor-
<br />dinate with type of roofing indicated.
<br />2. NRCA's "Roofing and Waterproofing Manual" details for installing units.
<br />PART 2 - PRODUCTS
<br />2.1 MATERIALS
<br />A. Aluminum -Zinc Alloy -Coated Steel Sheet: ASTM A 792/A 792M with Class AZ-50 coating, structural quality, Grade 40
<br />(Grade 275), or as required for strength.
<br />B. Insulation: Manufacturer's standard rigid or semirigid glass -fiber board of thickness indicated.
<br />C. Wood Nailers: Softwood lumber, pressure treated with waterborne preservatives for aboveground use, complying with AWPA C2;
<br />not less than 1-1/2 inches thick.
<br />D. Fasteners: Same metal as metals being fastened, or nonmagnetic stainless steel or other noncorrosive metal as recommended by
<br />manufacturer. Match finish of exposed fasteners with finish of material being fastened.
<br />l . Provide nonremovable fastener heads.
<br />E. Gaskets: Manufacturer's standard tubular or fingered design of neoprene, EPDM, or PVC; or flat design of foam rubber, sponge
<br />neoprene, or cork.
<br />F. Bituminous Coating: SSPC-Paint 12, solvent -type bituminous mastic, nominally free of sulfur and containing no asbestos fibers,
<br />compounded for 15-mil dry film thickness per coating.
<br />G. Mastic Sealant: Polyisobutylene; nonhardening, nonskinning, nondrying, nonmigrating sealant.
<br />H. Elastomeric Sealant: Recommended by unit manufacturer that is compatible with joint surfaces; ASTM C 920, Type S, Grade NS,
<br />Class 25.
<br />I. Roofing Cement: ASTM D 4586, nonasbestos, fibrated asphalt cement designed for trowel application or other adhesive compat-
<br />ible with roofing system.
<br />2.2 ROOF CURBS AND EQUIPMENT SUPPORTS
<br />A. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into
<br />the Work include, but are not limited to, the following:
<br />B. Manufacturers: Subject to compliance with requirements, provide products by one of the following:
<br />1. Custom Curb, Inc.
<br />2. Metallic Products Corporation.
<br />3. Vent Products Co., Inc.
<br />C. General: Units capable of supporting superimposed live and dead loads, including equipment loads and other construction to be
<br />supported. Coordinate dimensions with equipment to be supported..
<br />1. Provide preservative -treated wood nailers at tops of units and formed flange at perimeter bottom for mounting to roof.
<br />2. On ribbed or fluted metal roofs, form flange at perimeter bottom to conform to roof profile.
<br />3. Fabricate units to minimum height of 8 inches, unless otherwise indicated.
<br />4. Where slope of roof deck exceeds 1/4 inch per foot, fabricate support units with height tapered to match slope to level tops
<br />of units.
<br />D. Roof Curbs:
<br />1. Fabrication: Unless otherwise indicated or required for strength, fabricate units from minimum 0.0747-inch-thick, struc-
<br />tural -quality, hot -dip galvanized or aluminum -zinc alloy -coated steel sheet; factory primed and prepared for painting with
<br />welded or sealed mechanical corner joints.
<br />2. Fabrication: Unless otherwise indicated or required for strength, fabricate units from minimum 0.063-inch-thick, sheet
<br />aluminum with welded corner joints.
<br />3. Insulation: Manufacturer's standard rigid or semirigid insulation where indicated.
<br />4. Cants: Formed cants and base profile coordinated with roof insulation thickness.
<br />17 71 N X4 aY 61 i
<br />3.1 INSTALLATION
<br />A. General: Coordinate installation of roof accessories with installation of roof deck, roof insulation, flashing, roofing membranes,
<br />penetrations, equipment, and other construction to ensure that combined elements are waterproof and weathertight. Anchor roof
<br />accessories securely to supporting structural substrates so they are capable of withstanding lateral and thermal stresses, and inward
<br />and outward loading pressures.
<br />B. Install roof accessory items according to construction details in NRCA's "Roofing and Waterproofing Manual," unless otherwise
<br />indicated,
<br />C. Separation: Separate metal from incompatible metal or corrosive substrates, including wood, by coating concealed surfaces, at
<br />locations of contact, with bituminous coating or providing other permanent separation.
<br />D. Flange Seals: Unless otherwise indicated, set flanges of accessory units in a thick bed of roofing cement to form seal.
<br />E. Cap Flashing: Where required as component of accessory, install cap flashing to provide waterproof overlap with roofing or roof
<br />flashing (as counterflashing). Seal overlap with thick bead of mastic sealant.
<br />F. Clean exposed surfaces according to manufacturer's written instructions. Touch up damaged metal coatings.
<br />END OF SECTION 07720
<br />SECTION 07920 - JOINT SEALANTS
<br />PART 1 - GENERAL
<br />1.1 RELATED DOCUMENTS
<br />A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification
<br />Sections, apply to this Section.
<br />1.2 SUMMARY
<br />A. This Section includes sealants for the following:
<br />1. Exterior joints in vertical surfaces and nontraffic horizontal surfaces.
<br />2. Exterior joints in horizontal traffic surfaces.
<br />3. Interior joints in vertical surfaces and horizontal nontraffic surfaces.
<br />4. Interior joints in horizontal traffic surfaces.
<br />5. Firestop system through fire resistance - rated walls.
<br />6. Exterior joints in sheet metal flashing and trim.
<br />1.3 SUBMITTALS
<br />A. Firestop System Submittals: For each through -penetration firestop system, show each kind of construction condition penetrated,
<br />relationships to adjoining construction and kind of penetrating item. Include firestop design designation of testing and inspecting
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