Deck Defense® High Performance Roof Underlayment

Your roof is a big investment. Help protect it right from the start against water damage in the attic, which can cause mold growth and rotting deck boards. Deck Defense® High Performance Roof Underlayment features a durable, synthetic construction that works with your shingles to help shield your home from moisture infiltration.
Deck DefenseDeck Defense
Deck Defense
Deck Defense
  • Acts as a non-absorbent, secondary water-shedding barrier
  • Unique bottom surface coating reduces the chance for tears that cause leaks, as compared to other felt underlayment
  • Provides roof deck protection from UV exposure for up to 6 months**
  • Extra wide rolls cover approximately 5 times more than standard felt rolls
  • Preprinted nailing pattern and overlap lines help speed installation
  • 30-Year Limited Warranty*

Deck Defense® High Performance Roof Underlayment is part of the Owens Corning® Total Protection Roofing System§.


Roll Size 10 sq.
Length 250 ft.
Width 48 in.
Weight 36 lb.****
Coverage (with 3-in. overlap) 937 sq. ft.
Exposed Color Light grey
Surface Construction Coated textured poly

* See actual warranty for complete details, limitations and requirements.
** Special application required for extended exposure. See installation instructions.
*** Underlayment is tested as part of a roof assembly that includes wood decking, underlayment and asphalt roof shingles.

§ Excludes non–Owens Corning™ roofing products such as flashing, fasteners and wood decking.

**** weight includes the core weight

LEED® is a registered trademark of U.S. Green Building Council.