Roofing Underlayments - Tech Letters
Click on title to download Technical Letter in PDF file format.
VOC Technical Letter Tech Letter 1 - Insulation and Ventilation to Limit Ice Dam Formation Tech Letter 2 - Use as an Air and Vapor Barrier Tech Letter 3 - Exposure Guidelines Tech Letter 4 - Slope Requirements Tech Letter 5 - Chemical Compatibility Tech Letter 6 - In-Place Performance Temperatures Tech Letter 7 - Use under Architectural Metal Roofing Tech Letter 8 - Use Over Fluted Metal Decks Tech Letter 9 - Fastener Sealability Tech Letter 10 - Use Over Georgia-Pacific Dens-Deck® and Dens-Deck® Prime Tech Letter 11 - Shelf Life Tech Letter 12 - Use on Oriented Strand Board (OSB) Roof Sheathing Tech Letter 13 - Rigid Roof Insulation Boards and Grace Underlayments Tech Letter 14 - Dry-in Roofs with Grace Tri-Flex ® 30 Tech Letter 15 - Roof Eave Application Tech Letter 16 - Exposure Guidelines Grace Tri-Flex® & Tri-Flex® Xtreme