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ASTM D6757/D6757M-16
- Standard Specification for Underlayment Felt Containing Inorganic Fibers Used in Steep-Slope Roofing
- standard by ASTM International, 01/01/2016
- Publisher: ASTM
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1.1 This specification covers (1) inorganic fiber-reinforced organic felt underlayment and (2) inorganic fiber-based felt for use as underlayment with steep-slope roofing products. The intent of this specification is to provide criteria for producing and evaluating underlayments with a significantly reduced tendency to wrinkle before or after the installation of steep roofing products.