GCP Applied Technologies
48 in. x 250 ft. Tri-Flex 15 Roll Synthetic Roofing Underlayment



Tri-Flex 15 synthetic roofing underlayment is designed to overcome the shortcomings of #15 felt, while delivering advanced benefits that save the contractor time and labor. Tri-Flex 15 roofing underlayment is mechanically attached, and may be used in conjunction with all GCP fully-adhered underlaymentΓÇÖs or alone. Tri-Flex 15 has a 60-day exposure which provides contractors with added flexibility to accommodate the unpredictable construction schedules without compromising premium performance.

  • 10 times stronger than #15 felt: withstands high wind conditions, resists blow-offs and tears, protecting against costly repairs
  • More coverage per roll: 2.3 times more coverage per roll compared to #15 felt enables increased efficiency and labor savings
  • Lighter weight than #15 felt: provides fast and easy installation, allowing time and labor savings
  • Slip resistant surface - superior foot traction enables safer installation
  • Durable: 60-day exposure time allows to temporarily dry in structures and enables flexible construction schedules
  • Versatility: can be used under all major roof coverings
  • 100% Recyclable: contributes to sustainability and LEED
  • Developed by the recognized leader in self-adhered roofing underlayment's and the manufacturer of grace ice and water shield
  • Grace construction products are now brought to you by GCP Applied Technologies
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Coverage Area (sq. ft.)
1000 ft┬▓
Product Thickness (in.)
0.007 in
Product Width (in.)
Unrolled length (ft.)


Color Family
Product Weight (lb.)
24 lb
Roofing Product Type
Mineral Surface

Warranty / Certifications

Manufacturer Warranty
25 Year Warranty

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