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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 />E. All exposed edges of sheet metal shall be folded back, or "hemmed ", on concealed <br />surfaces. <br />F. Finish all sheet metal watertight and weathertight. <br />G. Where lap seams do not have a joint cover, lap according to pitch, but in no case less than <br />three inches. Make all lap seams in the direction of water flow. <br />3.03 Gutter and Downspout <br />A. Form built -in gutter of 20 oz copper to match profile of substrate. Line gutter substrate with <br />self - adhering rubberized asphalt membrane prior to installing new gutter. <br />B. Gutter ends shall be joined together by 3/4 inch wide locked and soldered cross seams. <br />C. At areas of built -in gutter and elsewhere where field soldering is to be performed, install one <br />ply of No. 30 felt, 8 inches wide, centered under area to be soldered. All joints shall be <br />soldered. <br />D. Top back edge of gutter shall terminate at roof edge in 1 inch loose lock seam. Separate <br />apron strip shall be hooked over top rear folded edge of gutter to form 1 inch loose lock <br />seam bent flat against back of gutter. Apron flashing shall extend up roof under slate not <br />less than 7 inches with upper edge folded 1/2 inch and secured with cleats spaced 24 inches <br />o.c. Adjacent lengths of apron flashing shall be lapped 4 inches. <br />E. Outer edge of gutter shall extend over cornice and be folded 1 inch over continuous cleat. <br />Cleat shall be secured to cornice with fasteners at 12 inches o.c. <br />F. Where ends of gutter abut masonry wall provide 1 inch space between gutter end and wall. <br />Install cover strip over end and extend under counter flashing. L -type water diversion baffle <br />shall be soldered across top of cover strip on line with center of gutter. <br />G. Outlet tubes shall be formed with locked and soldered longitudinal seam. Upper end of tube <br />shall be flanged % inch and soldered to gutter. Tube shall extend into downspout a <br />minimum of 3 inches. <br />H. Downspouts shall be fabricated from 16 oz copper. Downspout shall be round in shape, <br />diameter to match existing. <br />I. Downspouts shall be secured to gutter outlet tubes with pop rivets and solder. Downspouts <br />shall be secured to exterior walls with 1 inch wide copper straps. Straps shall be positioned <br />18 inches below cornice, 12 inches above discharge, and 10 feet o.c. <br />Extend downspout into cast -iron boots. Provide slip joint, 18 inches in length, where <br />downspout extends into boot to allow access into boot. Boots shall extend into <br />underground hubs connecting to subsurface drainage system. <br />3.04 Valleys <br />A. Fabricate and install metal valleys in conjunction with roofing work. Installation of valley <br />and slate shall result in open style configuration. Valley shall be fabricated in maximum <br />lengths of 10 feet and not less than 3 feet. <br />17 -198 Sheet Metal Flashing and Trim <br />076200 -5 <br />