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DocuSign Envelope ID: B49FB256 -4ADF- 4759- AF63- 134AD44FC239 <br />5thWall Building Diagnostics Consultants Slate Roof Replacement <br />Orange County Skills Development Center <br />Chapel Hill, NC <br />August 2017 <br />B. Valleys shall be of "W" configuration and shall be of sufficient width to extend a minimum <br />of 6 inches under slate. Side edges shall be folded 1/2 inch for cleating. <br />C. Upper end of each sheet shall be nailed to the deck with copper nails spaced 3 inches o.c. <br />Side edges shall be secured with 24 oz copper cleats spaced at 18 inches o.c. <br />D. Open portion of valley shall be exposed 2 inches either side from the center of the valley at <br />the top and increase in width 1/8 inch per foot toward eaves. <br />E. Valley sections shall lap a minimum of 8 inches in the direction of water flow. End laps of <br />valley metal sections shall not be soldered. <br />3.05 Step Flashing <br />A. Install step flashing at vertical walls and interfaces with slate roof systems. <br />B. Step flashing shall be fabricated from 16 ounce copper. Step flashing shall be L- shaped <br />with horizontal leg 3 inches in length; vertical leg shall be of sufficient length to extend <br />under counterflashing a minimum of 4 inches at the upslope side of the step flashing. <br />Width of step flashing shall match that of the slate. <br />C. Install step flashing in conjunction with slate installation. <br />3.06 Edge Metal and Trim <br />A. Form edge metal to profile indicated. Secure flange of edge metal to appropriate <br />blocking, nailers, or substrate per paragraph 2.03.C. <br />B. Allow a 1/4 inch gap between edge metal sections. Provide six inch wide backup plate <br />centered at each joint. Plate shall be formed to profile of the edge metal. Set metal and <br />set in a 1/8 inch thick bed of sealant. <br />3.07 Clean -up <br />A. Clean and neutralize all flux materials. <br />B. All excess solder, asphalt, and sealant shall be cleaned from the surface. <br />C. All handprints, smudges and other superficial stains that were placed on the sheet metal <br />during fabrication and installation shall be removed. <br />END OF SECTION <br />17 -198 Sheet Metal Flashing and Trim <br />076200 -6 <br />