00 ROOF ASSEMBLIES 2 exploded ply 042120webA highly vapor permeable roofing underlayment Air Barrier (AB) material

  • Used on Steep Slope Roofs Of 2:12, (9.46 Degrees) or Greater Pitch
  • Promotes Long Term Drying of Roofing Assembly Through Vapor Diffusion
  • Breathable and Airtight, with Exceptional Water and Air Holdout
  • Primerless Installation
  • High Drying Capacity (Vapor Permeability, 30 Perms)
  • Long exposure times, 6 months (180 days) UV and Climate Exposure Prior to Roof System Installation
  • Tough, Durable, and Slip Resistant—With Excellent Traction for Installers
  • Factory Made Rolled Good with Consistent Millage Thickness
  • Suitable for All Climates and Geographic Locations, Including Extreme Temperature Areas
  • 20 Year Material Warranty

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Roofing Materials Compatibility 

Standing Seam Metal Roof


Cedar Shingles/Shakes with VaproMat Drainage Matrix 

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Slate Roof


Tile Roof

  • Metal - Class A roof assembly with 1/4" thermal board
  • Tile - Class A no thermal board

Mass Timber Moisture Protection Strategies

SlopeShield Plus SA


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SlopeShield Plus SA protects mass timber from bulk water intrusion and concurrently dries mass timber through moisture vapor diffusion.

Taped Splines

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Alternative protection such as taped splines will leak and less durable lower perm sheet goods offer little to no drying capacity resulting in water damage and mold.

Learn More About Mass Timber Moisture Protection Strategies

Revolutionary Roofing Underlayment

VPPCT Gold Badge

SlopeShield Plus Self-Adhered’s high drying capacity and black coloration (which absorbs heat from the sun when exposed during construction), accelerates the drying process of the underlying materials.

This combination helps to mitigate construction moisture which would otherwise be trapped by a non-permeable roofing underlayment.


Complete Roof and Wall Water Resistant, Vapor-Permeable Air Barrier System

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Combine SlopeShield Plus SA and VaproShield's WRB/Air Barrier membranes to create an airtight, watertight, BREATHABLE building enclosure; mitigating moisture damage and saving energy for the life of the building.

Compatible Roof Deck Substrates and Applications

  • Gypsum/Fiber Roof Sheathing Boards
  • Rigid Insulation
  • Concrete
  • Plywood
  • Mass Timber
  • Pre-painted Steel
  • Galvanized Metal
  • Aluminum (Painted/Mill Finish)
  • Compact roof decks with rigid insulation
  • Steel decks
  • Plywood and wood decks
*For OSB and OSB factory-coated products contact VaproShield Technical.

Approvals and Certificates

Florida Product Approval FL41811 Image FMApproved US 01 UL Black Logo Horizontal NemoLogo WithText


Roofing Underlayment DIV 7 Specs

Water Barrier Protection for Mass Timber DIV 6 Specs


Moisture Protection for Mass Timber DIV 1 Specs


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