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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™