RoofBlock HT is a high temperature roofing underlayment composed of a high strength slip resistant spider web backing laminated to a high-performance, high temperature asphalt compound with a film release for ease of application. The release liner is removed leaving a strong asphalt compound to bond to the roof deck.

Features

• Vapor barrier/air barrier roofing underlayment 
• Membrane is composed of high strength, slip resistant spider web backing with release film for ease of application 
• Utilized in sloped roofing applications under metal, tile, slate, wood, shingles or shakes
• Designed for use at eaves to prevent damage from ice dams and in conjunction with SlopeShield Plus SA 
• Apply to entire roof deck in vented attic spaces as a vapor barrier
• High temperature resistance allows membrane to be exposed to heat of 260°F (127ºC) or less
• Water resistant around most nominal fasteners