Synthetic Roofing Underlayment

Synthetic Roofing Underlayment is a mechanically attached polymeric roof underlayment used in steep slope roofing. Underlayment is manufactured as a woven sheet coated on both sides. Underlayment rolls have approximate dimensions of 286ft x 42in. Underlayment is mechanically attached.

Ratings

ASTM D8257
Product has met specification requirements of ASTM D8257.

ASTM E108 (Fire)
Product has met Class A requirements of ASTM E108 when installed over minimum 3/8in thick APA-rated plywood decks with allowable roof covers of asphalt shingles (ASTM D3462). Slope is unlimited.

Legacy Ratings with Historical Precedence

ASTM D226
Product has met Type II requirements of ASTM D226 - Table 1 Physical Requirements (Breaking Strength, Pliability, and Loss on Heating). Note: Product is not an asphalt-saturated organic felt; product is a polymeric underlayment.

ASTM D4869
Product has met Type IV requirements of ASTM D4869 - Table 1 Physical Requirements (Tear Strength, Pliability, Loss on Heating, Liquid Water Transmission, Breaking Strength, and Dimensional Stability). Note: Product is not an asphalt-saturated organic felt; product is a polymeric underlayment.

CSA A123.3
Product has met selected Type 3 requirements of CSA A123.3 - Table 1 Physical Requirements (Loss on Heating, Pliability, Breaking Strength, and Water Shower Exposure Test). Note: Product is not an asphalt-saturated organic felt; product is a polymeric underlayment.