ASTM InternationalASTM D226Specification for Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing.Referenced across 4 Anvilfield field guides. Field guides that apply ASTM D226RoofingRoofingRoofing underlayment typesRoofingSiding installationRoofingSteep-slope shingle roofingRoofingWood shake and shingle roofing Often cited alongsideIRCOSHA 1926 Compare your optionsAsphalt shingle vs Standing-seam metal Browse all codes and standards