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3.12 <br />A <br />THERMOPLASTIC MEMBRANE <br />ROOFING - ADHERED <br />Section 07541 <br />15-1207 <br />SARNACLAD METAL BASE FLASHINGS <br />All flashings shall be installed concurrently with the roof membrane as the job progresses. <br />No temporary flashings shall be allowed without the prior written approval of the Owner's <br />Representative and Sika Sarnafil. Acceptance shall only be for specific locations on specific <br />dates. If any water is allowed to enter under the newly completed roofing due to incomplete <br />flashings, the affected area shall be removed and replaced at the Applicator's expense. <br />Sarnaclad metal flashings shall be formed and installed per the Detail Drawings. <br />All metal flashings shall be fastened into solid wood nailers with two rows of post <br />galvanized flat head annular ring nails, 4 inches (100 mm) on center staggered. <br />Fasteners shall penetrate the nailer a minimum of 1 inch (25 mm). <br />2. Metal shall be installed to provide adequate resistance to bending and allow for normal <br />thermal expansion and contraction. <br />B. Adjacent sheets of Sarnaclad shall be spaced 1/4 inch (6 mm) apart. The joint shall be <br />covered with 2 inch (50 mm) wide aluminum tape. A 4 inch minimum (100 mm) wide strip of <br />Sarnafil flashing membrane shall be hot-air welded over the joint. Exercise caution at <br />perimeter of roof. <br />IN <br />3.13 <br />SarnaTred V Walkway <br />Follow manufacturer's current recommendations for proper installation. <br />PERIMETER WARNING TAPE <br />Areas of membrane where tape is to be applied must be cleaned to a "like new" condition. <br />Failure to properly clean the membrane will result in less than satisfactory adhesion. The <br />membrane should be cleaned as follows: <br />1) New membrane: Remove loose dirt and dust by wiping clean with water. For areas <br />where dirt is embedded, scrub the application area with a commercial cleaner such as <br />Simple Green, 409 or other similar all-purpose cleaner using a Scotch Brite scrubbing <br />pad or similar product. Wash away residual cleaning material with clean water. <br />2) Weathered membrane: For older membranes or areas where there is excessive dirt <br />buildup, use the above cleaning procedure followed by cleaning with a natural fiber rag <br />wet with MEK, and wipe away all residual cleaning solution and remaining dirt until <br />membrane has a "like new" appearance. <br />After surface is clean and dry, apply tape to surface taking care to avoid trapping air and <br />creating blisters as tape is smoothed over with hand pressure. If a chalk line is used be sure <br />to keep chalk dust clear of application area. <br />Do not apply Perimeter Warning Tape to surfaces where the temperature is below 40°F <br />(40C)• <br />Perimeter Warning Tape may be slippery when wet. <br />23 <br />