Quick Overview 

Rainscreen SA Matrix Penny 032521 webRoofBlock 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.

A high temperature Vapor Barrier/Air Barrier Roofing Underlayment

  • 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






Permeable Roof and Wall System

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Vapor Barrier Roofing system - Vented Roof Design

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Compatible Roof Deck Substrates

  • Gypsum-based Roof Sheathing
  • Plywood
  • Wood Composite
  • OSB
  • Metal
  • Concrete
  • Wood Plank


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