NOTE ** This section includes copper roofing accessories and trim formed from copper sheet or lead-covered copper sheet. Examples of systems covered by this section include built-in valleys, scuppers, gutters and downspouts.
NOTE **
NOTE ** Information in this section is provided by the Copper Development Association (CDA), the central authoritative source of technical data on the design specification and installation of architectural copper products. With capabilities for providing seminars, technical publications, design assistance and review, CDA can be an invaluable resource to the architect specifying any architectural copper products or applications.
NOTE **
NOTE ** For additional information about copper flashing and trim, contact CDA at:
D. Section 07712 - Copper Roof Accessories: Roof accessory units of premanufactured, set-on type.
E. Section 07900 - Joint Sealers.
1.3 REFERENCES
A. ASTM B 32 - Standard Specification for Solder Metal.
B. ASTM B 101 - Standard Specification for Lead-Coated Copper Sheet and Strip for Building Construction.
C. ASTM B 370 - Standard Specification for Copper Sheet and Strip for Building Construction.
D. ASTM D 2822 - Standard Specification for Asphalt Roof Cement.
E. CDA 4115-1929 - Copper in Architecture - Handbook; Copper Development Association (CDA).
1.4 SUBMITTALS
A. Submit in accordance with Section 01300.
B. Product Data: Submit manufacturer's technical product data, installation instructions and general recommendations for each specified sheet material and fabricated product.
C. Samples: 6 or 12-inch-square samples of specified sheet materials to be exposed as finished surfaces.
NOTE ** Delete paragraphs above and below if no appearance control is required on sheet materials. Delete paragraph below if visual control of trim units, gutters, downspouts, expansion joint units, and similar items is unnecessary.
D. Samples: 6 or 12-inch-long samples of factory-fabricated products exposed as finished work, including specified factory finish.
NOTE ** Delete entire paragraph below if none of the work is complicated enough to justify shop drawings. If paragraph is retained, edit to add or delete items as appropriate to project.
E. Shop Drawings: Submit layout, profiles, methods of joining, and anchorage details, including major counterflashings, trim/fascia units, gutters, downspouts, scuppers, and expansion joint systems. Provide layouts at 1/4-inch scale and details at 3-inch scale.
1.5 QUALITY ASSURANCE
A. Installer: A firm with 3 years of successful experience with installation of copper flashing and trim similar in type and scope to project requirements.
B. Coordinate work of this section with interfacing and adjoining work for proper sequencing of each installation. Ensure best possible weather resistance and durability of work and protection of materials and finishes.
NOTE ** Possibly insert here special project warranty requirements for extensive or elaborate installations.
PART 2 PRODUCTS
2.1 FLASHING AND TRIM MATERIALS
A. Copper: ASTM B 370; temper H00 (cold-rolled) except where temper 060 is required for forming; 16 oz. (0.0216-inch thick) except as otherwise indicated.
NOTE ** Delete subparagraph below if lead protection of copper sheet is not required for project.
1. Provide lead coating in accordance with ASTM B 101 on exposed copper surfaces.
2.2 LAMINATED COMPOSITION SHEET FLASHING
A. Copper/Paper Flashing: 3-oz. copper sheet laminated between 2 sheets of bituminous impregnated creped Kraft paper or saturated fabric.
NOTE ** Delete paragraph below for generic specification. If paragraph is retained, edit following list of products as required.
B. Provide one of the following products:
1. Afco Products, Inc.; "Cop-A-Bond Duplex."
2. Phoenix Building Products, Inc.; "Duplex Cop-R Flash."
3. York Manufacturing, Inc.; "Cop-R-Tex Duplex."
C. Miscellaneous Materials and Accessories:
1. Solder: Provide 50 - 50 tin/lead solder (ASTM B 32), with rosin flux.
2. Fasteners: Same metal as flashing/sheet metal or other non-corrosive metal as recommended by sheet manufacturer. Match finish of exposed heads with material being fastened.
3. Bituminous Coating: SSPC - Paint 12, solvent-type bituminous mastic, nominally free of sulfur, compounded for 15-mil dry film thickness per coat.
NOTE ** Possibly insert in paragraph below specific product type or brand name.
5. Elastomeric Sealant: Generic type recommended by manufacturer of metal and fabricator of components being sealed and complying with requirements for joint sealants as specified in Section 07900 - Joint Sealers.
6. Epoxy Seam Sealer: 2-part noncorrosive metal seam cementing compound, recommended by metal manufacturer for exterior/interior nonmoving joints including riveted joints.
7. Adhesives: Type recommended by flashing sheet manufacturer for waterproof/weather-resistant seaming and adhesive application of flashing sheet.
8. Roofing felt: asphalt or coal tar saturated felt weighing not less than 30 lbs per 100 square feet.
9. Paper Slip Sheet: 4 to 6-lb. rosin-sized building paper.
10. Reglets: Units of type and profile indicated, compatible with copper, noncorrosive.
11. Metal Accessories: Provide clips, straps, anchoring devices, and similar accessory units as required for installation of work, noncorrosive, size and gauge required for performance.
12. Gutter and Conductor-Head Guards: 20-gage bronze mesh or fabricated units, with selvaged edges and noncorrosive fasteners.
13. Roofing Cement: ASTM D 2822, asphaltic.
NOTE ** Add other materials as required by project.
2.3 FABRICATED UNITS
A. Metal Fabrication: Shop-fabricate work to greatest extent possible. Comply with details shown and with applicable requirements of CDA "Copper in Architecture - Handbook" and other recognized industry practices. Fabricate for waterproof and weather-resistant performance, with expansion provisions for running work sufficient to permanently prevent leakage, damage, or deterioration of the work. Form work to fit substrates. Comply with material manufacturer instructions and recommendations for forming material. Form exposed copper work without excessive oil-canning, buckling, and tool marks, true to line and levels indicated, with exposed edges folded back to form hems.
B. Seams: Fabricate nonmoving seams with flat-lock seams. Tin edges to be seamed, form seams, and solder. Rivet joints for additional strength where required.
C. Expansion Provisions: Where lapped or bayonet-type expansion provisions in work cannot be used or would not be sufficiently water/weatherproof, form expansion joints of intermeshing hooked flanges, not less than 1 inch deep, filled with mastic sealant (concealed within joints).
D. Sealant Joints: Where movable, nonexpansion type joints are indicated or required for proper performance of work, form metal to provide for proper installation of elastomeric sealant, in compliance with CDA standards.
NOTE ** Insert specific listing in paragraph below of separations known to be required for work as detailed. Try to avoid this need by careful detailing.
E. Separations: Provide for separation of metal from noncompatible metal or corrosive substrates by coating concealed surfaces at locations of contact, with bituminous coating or other permanent separation as recommended by manufacturer/fabricator.
NOTE ** Revise provisions of the article below as dictated by project requirements. Other proprietary systems that include substantial curb constructions as part of the unit should be specified as part of roofing accessories elsewhere in Division 7.
NOTE **
2.4 ELASTIC EXPANSION JOINTS
A. General: Provide factory-fabricated units of size and profile indicated, complete with prefabricated corner units, intersection units, and splicing materials. Provide complete with elastic sheet flashing forming the primary joint membrane, in a supported, "bellows" arrangement designed for securement to both sides of expansion joints. Underside of bellows insulated with adhesively applied, flexible, closed-cell rubber or plastic not less than 3/8-inch thick.
B. Type: Encapsulated copper flanged edges, for embedment in other construction or nailing to substrates, 4-inches maximum flange width.
NOTE ** Normally delete paragraph above or below.
C. Type: Copper flanged edges, 3 to 4 inches wide, formed to profiles as indicated to fit curbs and designed for nailing to curb substrate. Provide 16 oz. metal flanges.
D. Looped Bellows Width: 5 to 6 inches, exclusive of flanges.
NOTE ** Delete paragraph below for generic specification. If paragraph is retained, edit following list of products as required.
E. Manufacturers: Provide products that comply with project requirements and that are made by one of the following:
1. Afco Products, Inc.
2. Celotex Corporation
3. International Permalite/Roofing Components Group.
4. Manville/Roofing Systems Division.
5. Phoenix Building Products, Inc.
6. York Manufacturing, Inc.
PART 3 EXECUTION
3.1 INSTALLATION
A. General: Except as otherwise indicated, comply with manufacturer's installation instructions and recommendations and with CDA "Copper in Architecture - Handbook."
1. Anchor units of work securely in place by methods indicated, providing for thermal expansion of units; conceal fasteners where possible, and set units true to line and level as indicated.
2. Install work with laps, joints, and seams that will be permanently watertight and weatherproof.
B. Underlayment: Where installation is to be directly on cementitious or wood substrates, install a slip sheet of red rosin paper on a course of asphalt saturated felt.
C. Bed flanges of work in a thick coat of bituminous roofing cement where required for waterproof performance.
D. Install reglets to receive counterflashing in manner and by methods indicated. Where shown in concrete, furnish reglets to trades of concrete work for installation. Where shown in masonry, furnish reglets to trades of masonry work for installation.
E. Install counterflashing in reglets, either by snap-in seal arrangement or by soldering in place for anchorage and filling reglet with mastic or elastomeric sealant, as indicated and depending on degree of sealant exposure.
F. Install elastic flashing in accordance with manufacturer's recommendations. Where required, provide for movement at joints by forming loops or bellows in width of flashing. Locate cover or filler strips at joints to facilitate complete drainage of water from flashing. Seam adjacent flashing sheets with adhesive, seal and anchor edges in accordance with manufacturer's recommendations.
G. Nail flanges of expansion joint units to curb nailers, at maximum spacing of 6 inches o.c. Fabricate seams at joints between units with minimum 3-inch overlap, to form a continuous, waterproof system.
H. Install continuous gutter guards on gutters, arranged as hinged units to swing open for cleaning gutters. Install "beehive"-type strainer-guard at conductor heads, removable for cleaning downspouts.
NOTE ** Insert other specific installation requirements for other systems and sheet metal accessory items included in Part 2.
3.2 CLEANING AND PROTECTION
A. Clean exposed copper surfaces, removing substances that might cause discoloration of metal.
B. Protection: Advise Contractor of required procedures for surveillance and protection of flashings and sheet metal work during construction to ensure that work will be without damage or deterioration other than natural weathering at time of Substantial Completion.
