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1507.11 Modified Bitumen Roofing
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The installation of modified bitumen roofing shall comply with the provisions of this section.
1507.11.1 Slope
Modified bitumen roofing shall have a design slope of not less than 1/4 unit vertical in 12 units horizontal (2-percent slope) for drainage.
1507.11.2 Material Standards
Modified bitumen roofing materials shall comply with ASTM D6162, ASTM D6163, ASTM D6164, ASTM D6222, ASTM D6223, ASTM D6298 or ASTM D6509.
1507.11.2.1 Base Sheet
A base sheet that complies with the requirements of Section 1507.11.2, ASTM D1970 or ASTM D4601 shall be permitted to be used with a modified bitumen cap sheet.
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