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OC DSS -Hillsborough Commons Skylight Replacement Smith Sinnett / 2020054 <br />Hillsborough, NC Orange County <br /> <br />SHEET METAL FLASHING AND TRIM 07 62 00 - 5 <br />d. Size 1: 8” x 6” where indicated in drawings. Slope to downspout. <br />B. Downspouts: Fabricate downspouts complete with mitered elbows. Furnish with metal hangers, from <br />same material as downspouts, and anchors. <br />1. Fabricated Hanger Style: SMACNA figure designation 1-35C <br />2. Fabricate from the following materials: <br />a. Aluminum-Zinc Alloy-Coated Steel Sheet, 22 gauge <br />b. Exterior Finish: Fluoropolymer two-coat system. <br />c. Color: As selected by Architect from manufacturer's standard colors. <br />d. Size 1: 4” x 6” where indicated in drawings <br />PART 3 - EXECUTION <br />3.1 EXAMINATION <br />A. Examine substrates and conditions under which sheet metal flashing and trim are to be installed and <br />verify that Work may properly commence. Do not proceed with installation until unsatisfactory <br />conditions have been corrected. <br />3.2 INSTALLATION <br />A. General: Unless otherwise indicated, install sheet metal flashing and trim to comply with performance <br />requirements, manufacturer's installation instructions, and SMACNA's "Architectural Sheet Metal <br />Manual." Anchor units of Work securely in place by methods indicated, providing for thermal expansion <br />of metal units; conceal 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 weatherproof. <br />B. Install exposed sheet metal Work that is without excessive oil canning, buckling, and tool marks and <br />that is true to line and levels indicated, with exposed edges folded back to form hems. Install sheet metal <br />flashing and trim to fit substrates and to result in waterproof and weather-resistant performance. Verify <br />shapes and dimensions of surfaces to be covered before fabricating sheet metal. <br />C. Roof Edge and Parapet Cap Flashings: Secure flashing sat roof edges according to meet all wind load <br />conditions. All roof edge and parapet cap flashing corners shall welded, mitered and ground smooth prior <br />to finishing. <br />D. Expansion Provisions: In gutters, space expansion joints as indicated, or if not indicated place as <br />required to provide for two downspouts to be located in any gutter run between expansion joints, with no <br />joints allowed within 24 inches of corners. Fabricate expansion joints in gutters with end caps on both <br />gutter runs, separate gutter runs by 1", cover face of joint with a six-inch exposed joint cover and cap the <br />joint with an exposed cover plate. <br />1. Lapped or bayonet-type expansion joints are not permitted. <br />E. Sealed Joints: Form non-expansion, but movable, joints in metal to accommodate elastomeric sealant to <br />comply with SMACNA standards and as follows: <br />1. Fabricate sealed joints in prefinished sheet metal with butt joints and concealed splice plates. <br />Install silicone elastomeric sealant between exposed metal work and splice plates, and rivet one <br />side of fabricated unit to splice plate for strength. <br />a. Do not use lapped or bayonet-type (nested) joints for sheet metal fabrications. <br />2. Fabricate concealed splice plates of specific size and profile to maintain lines and form of <br />fabricated work. <br />3. Provide a 1/8" gap between fabricated units at butt joints. <br />F. Separations: Separate metal from non-compatible metal or corrosive substrates by coating concealed <br />surfaces, at locations of contact, with asphalt mastic or other permanent separation as recommended by <br />manufacturer. <br />G. Install reglets to receive counterflashing according to the following requirements: <br />DocuSign Envelope ID: 51195338-6F17-4D2B-B990-4A82329E7F4E