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1 3.09 VENT AND STACK FLASHING <br /> 2 <br /> 3 A. Shingles shall be applied up to the point where vent or stack pipe projects through the roof <br /> 4 and the nearest shingle shall be cut and fitted around the pipe. Before shingles are , <br /> 5 applied beyond the pipe, a flashing flange shall be prepared and installed as follows: <br /> 6 <br /> 7 B. A rectangular flange, large enough to cover the roof surface for 4 inches below the pipe, ' <br /> 8 8 inches above the pipe, and 6 inches on each side of the pipe, shall be cut from 55 <br /> 9 pound roll roofing. It should preferably be in one piece, but if this is not possible, the total <br /> 10 length of the material shall provide for at least 2 inches of lap where horizontal joints occur. <br /> 11 ,12 C. The flashing flange shall then be slipped over the pipe and laid flat on the roof and a collar <br /> 13 of plastic cement shall be formed around the pipe, extending 2 inches up the pipe and out <br /> 14 over the flange a similar distance. The plastic cement shall be thoroughly trowelled in <br /> 15 place so that it will adheres properly and so that all air pockets in the cement will be <br /> 16 eliminated. After the flashing flange is applied, shingling shall be continued up the roof. <br /> 17 the lower part of the flange shall lap over the shingles, while along the sides and at the <br /> 18 back of the pipe, the shingles shall cover the flange. Shingles shall be fitted around the , <br /> t9 pipe and bedded in 1/16-inch thick coating of plastic cement where they overlay the flange. <br /> 20 <br /> 21 <br /> 22 <br /> 23 <br /> 24 END OF SECTION <br /> 25 <br /> COMPOSITION SHINGLES <br /> 042794 07310-4 <br /> i <br /> t <br />