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5thWall Building Diagnostics Consultants Government Services Annex <br /> District Attorney Office <br /> Roof Replacement <br /> November 2009 <br /> Co Bottom of counterflashing shall clear cant or transition locations 1 /2 inch . <br /> D . Lap joints a minimum of three inches . Solder all joints . Notch ends per SMACNA <br /> Figure 2 - 5 Detail 1 . <br /> E . Apply caulking between flat surface of counterflashing and walls , curbs , etc , prior to <br /> securing . <br /> F . Anchor counterflashing to walls , curbs , etc . using expansion type masonry anchors <br /> installed through counterflashing into predrilled slotted holes 8 inches o . c . Use neoprene <br /> washers to seal expansion anchors . Where required , sawcut reglet and install receiver <br /> with lead wedges 12 inches o . c . Lead wedges shall be 2 inches in length and spaced 24 <br /> inches o . c . <br /> G . Counterflashing shall extend beyond ends of baseflashing 6 inches . Extend <br /> counterflashing around corners 6 inches unless otherwise required . <br /> H . Caulk top edge of counterflashing, domed or sloped to shed water . <br /> 3 . 07 Valleys <br /> A . Fabricate valleys from copper metal . Valley shall be " W" -type . Edges of long <br /> dimension shall form an open hem 5 / 8 inches in width and turned over top of valley 180 ° . <br /> Be Legs of valley shall be of sufficient width to extend under shingles a minimum of 8 <br /> inches . <br /> C . Secure valley in place with clips spaced at 18 inches on center along both sides of the <br /> long dimension . Hook clip into open hem . Clips shall be 2 inches in width and secured <br /> to the substrate with fasteners . <br /> 3 . 07 Saddles <br /> A . At chimneys and similar projections or abutments , provide saddle per SMACNA <br /> recommendations . <br /> Be Fabricate saddle from copper metal . <br /> C . Install saddle in conjunction with shingles . <br /> 3 . 08 Gutter <br /> A . Gutter shall be fabricated in sections not less than 10 feet in length and shall be complete <br /> with end pieces , outlet tubes , and special pieces that may be required . Gutter shall be : <br /> 1 ) Government Services Annex : Half-round , 6 inch . <br /> 2 ) District Attorney Office : Profile Style "K" , 5 inch . <br /> Be Gutter sections shall be joined with rivets and sealed with sealant except galvanized and <br /> copper metal which shall be soldered . Sections shall overlap 2 inches . Unless otherwise <br /> indicated provide expansion joints where indicated . Expansion joint shall be fabricated <br /> per SMACNA Figure 1 - 7 with cover plate ; space between gutter ends shall be 1 1 / 8 inch . <br /> 09 -26 Sheet Metal Flashing and Trim <br /> 076200 - 6 <br />