Laserfiche WebLink
, <br /> � p�rmauently prevent�leakage, damage,or-deterioration�of ihhe work. Form work to fit subsixates. <br /> Comply with material manufacturer instre�ctions and recommendations for forming material. Form <br /> � exposed sheet metai work without excessive oi1-canning,buckling,and tool marks,true to lune and <br /> levels indicated,with exposed edges folded back to foim hems. <br /> B. Searns: Fabricate nonmoving seams in sheet meta.l with flat lock seams. For metal other <br /> ' than aluminum,tin edges to be seamed,form seams,and solder. Form alu�tinum seamswith <br /> epo�ry seam sealer. <br /> � C. Expansion Provisions: Where lappe�i or ba.yonet-type expansion provisions in work cannot <br /> be used or would not be sufficiendy water/weatherproof, form expansion joints of <br /> intermeshing hooked flanges,not less than 1 inch deep,filled with mast�c sealant{concealed <br /> within joints). <br /> rD. Sealant Joints: Where movable, non-expansion type joints are indicated or required for <br /> proper perfonnance of work, for�n metal to provide for proper installation of elastomeria <br /> ' sealasit,in compliance with SMACNA standards. <br /> E. Separations: Provide for separation of ineta.l from non-compatible metal or corrosive <br /> seabstrates by coatin�concealed surfaces at locations of contact,with biluminous coating or <br /> , other pemianent separation as recommended by manufacturer/fahricator. <br /> F. Aluminum Extrusion Units: Fabricate extruded aluminum running units with formed or <br /> � extntded aluminum joint covers for installation behind main members where possible. <br /> Fabricate mitered and weided comer units. <br /> G. Shop Finish,Rain Drainage: Provide manufacturer's standard baiced-an white acrylic shop <br /> � finish on sheet metal rai�draiaage units(gutters,downspouts,and similar exposed units); <br /> 1.0-mil dry film thickness. <br /> ' H. Do not use copper flashing under red cedar wood shingles. <br /> I. Mannfachuers: Subject to complZance wrth requ�rements <br /> � PART 3 -EXECUTION <br /> 3.i Il�TSTALLATION REQUIltEMENTS <br /> , A. General: Excegtasotherwise indicated,compiywithmanufact�u�e�'s installanon instnsctions <br /> and recommendations az�d with SMACNA "Architectural Sheet Metal Manual."Anchar <br /> units of work securely in piace by methods in�dicated,providing for thern►al expansion of <br /> � metal units; conceal fasteners wherc possible, and set uni�s trae to line and level as <br /> indicated. Install work with laps,joints,atid seams that wiil be permanently watertight and <br /> weatherproof. <br /> � B. Underlayment: Where stainless steel or aluminum is to be installed directly on cementitious <br /> or wood substrates, install a. slip sheet of red rosin paper and a course of polyethylene <br /> underlayment. <br /> ' C. Bed flanges of work in a thick coat of bituminous roofing cement where required for <br /> waterproof performance. <br /> ' 3.2 CLEANING AND PR�TECTION . <br /> A. CIean exposed metal surFaces,removing substances that migtit cause corrosion of inetal ar <br /> , deterioration o£ftnishes. <br /> FLASHING AND SHEET METAL Page 3 of 4 <br /> , <br />