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DocuSign Envelope ID:A9CF8A9E-4CDB-4BB9-A678-D4AD80CD1393 <br /> 5thWall Building Diagnostics Consultants Roof Replacement <br /> Central Recreation Center <br /> Hillsborough,NC <br /> August 2016 <br /> C. Flanges of metal flashing to be incorporated into the roof system shall be a minimum of <br /> four inches in width. Provide pre-drilled holes at three inches o.c. staggered for insertion <br /> of nails. Holes shall be located one inch from the leading edge of the flange; second row <br /> to be one inch from the first. <br /> D. Form sections square, true, and accurate to size, free from distortion, sharp edges, and <br /> other defects detrimental to appearance or performance. Shop fabricate sheet metal <br /> sections to the maximum extent possible. <br /> E. Junctures, intersections, corners and unions of sheet metal shall be fabricated from one <br /> piece with minimum 18-inch legs; legs shall not be longer than 24 inches. Seam corners <br /> for rigidity,seal with sealant. <br /> F. Fabricate vertical faces with bottom edge formed outward 5/8 inch and hemmed to form <br /> drip. <br /> G. At all locations where new sheet metal sections abut walls, copings, or terminate, the <br /> sheet metal flashings shall terminate with end sections of one-piece construction to <br /> provide watertight seams. Seams shall be sealed; seams of copper or stainless steel shall <br /> be soldered. <br /> H. Sheet metal flashings shall be fabricated and installed to allow for expansion and <br /> contraction of the component materials without buckling, hole elongation, fastener <br /> failure, or excess stress loading situations developing at any time during the temperature <br /> cycle. Clips shall be designed and installed to resist rotation and to avoid shear stress <br /> when roofing materials expand and contract. Flashing shall not be installed across <br /> expansion joints. <br /> PART 3 EXECUTION <br /> 3.01 Inspection <br /> A. Inspect nailer areas to verify that they are clean, smooth, and free of depressions, waves, <br /> or projections and solidly supported over joints. <br /> B. Verify that roof openings,pipes, sleeves or vents through roof are solidly set. <br /> C. Verify compatibility of flashing system with other system materials. <br /> D. Verify installation of all appropriate baseflashings prior to installation of sheet metal. <br /> 3.02 Installation-General <br /> A. Dissimilar metals shall be kept separated to prevent galvanic action. Preventive measures <br /> shall include separation by suitable bituminous paint. <br /> B. Where bituminous materials are to be applied to sheet metal, the flanges shall first be <br /> primed with an asphaltic primer. The primer shall be interrupted where caulking is to be <br /> applied. <br /> C. All metal flanges shall be installed on top of membrane and set in a full bed of flashing <br /> cement. <br /> 16-171 Sheet Metal Flashing and Trim <br /> 076200-4 <br />