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Technical Letters

Technical Letters

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Insulation and Ventilation to Limit Ice Dam Formation
Use as a Vapor Barrier
Exposure Guidelines
Slope Requirements
Chemical Compatibility
In-Place Performance Temperatures
Use under Architectural Metal Roofing
Use Over Fluted Metal Decks
Fastener Sealability
Use Over Georgia-Pacific Dens-Deck®
Shelf Life
Use on Oriented Strand Board (OSB) Roof Sheathing

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