GAF Roof Leak Barriers & Ice Dam Protection

"Protect Your Investment And Safeguard Vulnerable Areas"


Film surfaced leak barrier, suitable for application under shingle and metal roofs.



Mineral surfaced leak barrier, suitable for application under shingle roofs.

UnderRoof 2

UnderRoof™ 2

Premium leak barrier designed for use under tile roofs.

Leak Barrier

  • Protect Your Property...
    Help prevent wind-driven rain from leaking through the roof deck, or melting ice and snow (caused by ice dams in harsh winter climates) from leaking into property’s interior

  • Add Extra Protection...
    In valleys and at eave and rake edges — the most leak-prone areas of the roof. Strongly recommended for chronic problem areas like skylights, dormers, vent pipes, chimneys, and other flashing areas

  • Won’t Leak...
    Helps ensure a 100% watertight seal

  • Avoid Costly Repairs...
    Due to staining on interior walls and ceilings

  • Better Appearance...
    Fiberglass reinforcement helps resist wrinkling and buckling — lays flatter under shingles

  • Saves Labor...
    Split-back release film peels off in sections, for faster installation and superior property owner value

  • Peace Of Mind...
    Benefits from the same warranty term as the shingles they are applied under, up to a maximum of 30 years*

*See ltd. warranty for complete coverage and restrictions

Get Automatic Lifetime Protection On Your GAF Leak Barriers and Your Entire GAF Roofing System!

  • A Lifetime ltd. warranty... on your shingles and all qualifying GAF accessories! (See Details)
  • Non-prorated coverage for the first 10 years (See Details)

Professional Installation

GAF Roof Wizard
Virtual Home Remodeler

Product Pricing and Where to Buy