TRI-FLEX® Synthetic Underlayment

Performance alternative to roofing felt.

Install a high-performance felt alternative

What does roofing underlayment need to do?

  • Shed water and act as the final layer of defense on your roof
  • Withstand jobsite conditions for long periods of time prior to installation of the final roof covering
  • Offer a slip resistant and walkable surface


TRI-FLEX® synthetic underlayments, from the same company that makes GRACE ICE & WATER SHIELD®, does all of this and more.

4 ½x
the coverage of a roll of 30-lb. felt
180
days of exposure resistance
½
the weight of felt
10x
stronger than felt
Overview

Resists both weather and jobsite conditions

Felt is heavy and easily damaged by wind and rain. TRI-FLEX® synthetic underlayment is 10 times stronger than felt, resists wind and rain, has a slip-resistant surface and provides remarkable waterproofing. Its exceptional strength reduces rework and its lighter weight increases productivity.

 Make life easier with TRI-FLEX® 

As a roofing contractor, TRI-FLEX® not only provides lasting protection for homes you build—it makes the jobsite safer and easier for your crew.

  • Specifically formulated to be walkable and skid-resistant
  • A single roll covers nearly five times as much area as a roll of #30 felt
  • At 20x the strength of felt, it resists damage in windy conditions and up to 180 days UV resistance

Works on all homes, under all conditions

TRI-FLEX® is a mechanically-attached roofing underlayment that can be applied under nearly any roofing material—shingles, tiles, slate, metal, and more. Exceptional UV resistance allows it to be exposed for up to six months before installing the final roof covering.

Learn how to install TRI-FLEX® for maximum performance

TRI-FLEX® offers a slip resistant surface for improved walkability, and its lightweight improves jobsite productivity. 

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Product Listing
  • Product
  • Description
  • Key Benefits
  • Applications Type
TRI-FLEX® 15 Synthetic Underlayment
Description

TRI-FLEX 15 synthetic underlayment exceeds the requirements of ASTM D226 type I and II and offers the benefits of a synthetic to traditional #15 felt users.

Key Benefits
  • Very Strong, 10x stronger than felt
  • 30 day UV exposure
  • 100% recycleable
Application Type
  • Use under asphalt shingles or metal roofing
  • Replaces roofing felt in sloped roof applications
  • Temporary protection before final roof covering is installed
TRI-FLEX® XT Synthetic Underlayment
Description

Tri-Flex® XT underlayment is a high strength woven synthetic roofing underlayment coated on both sides with slip resistant polymers.

Key Benefits
  • Very strong, 20x stronger than felt
  • 180 day UV exposure
  • 100% recycleable
Application Type
  • Use under asphalt shingles or metal roofing
  • Replaces roofing felt in sloped roof applications
  • Temporary protection before final roof covering is installed
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