Deck‑Armor Premium Breathable Roof Deck Protection

Breathable technology helps manage roof system moisture and provides a secondary layer of winddriven rain protection.

Why Deck‑Armor Premium Breathable Roof Deck Protection?

Conventional organic felts can absorb moisture, causing buckling and wrinkling that can impact the look of your roof. Deck-Armor™ Premium Breathable Roof Deck Protection combines strength and breathability to help protect your home against wind driven rain and trapped moisture.

Deck-Armor™ Premium Breathable Roof Deck Protection is a key part of the GAF Lifetime Roofing System,and has earned the Good Housekeeping Seal.2



Helps reduce inside moisture in the roofing system, that can cause mold, mildew, and expensive structural damage



Durable, long-lasting premium synthetic construction



Helps resist wrinkling and buckling for a more uniform look

  • Breathable Technology:  Unlike typical synthetic underlayments, Deck-Armor™ helps reduce inside moisture from becoming trapped within your roofing system.
  • Exceptionally Strong:  At least 600% greater tear strength than standard #30 asphalt felt.3
  • Safer:  Special slip-resistant surface provides enhanced walkability, even on steeper-pitched roofs.
  • Fast installation:  48″(1.22 m) wide roll provides 33% more coverage per course than traditional 36″ (914 mm) wide felts.
  • Lightweight:  At approximately 43 lbs. (19.5 kg) per roll, it’s lighter and easier to handle than a roll of  #30 felt.
  • Flexible Application:  Recommended for use with asphaltic-shingle roof systems. May also be used with certain non-asphaltic systems, such as slate, wood, metal, or tile.4
  • UV Stabilized Polypropylene Construction:  Resists UV degradation for up to 180 days.5

1Lifetime refers to the length of warranty coverage provided and means as long as the original individual owner(s) of a single-family detached residence [or the eligible second owners(s)] owns the property where the qualifying GAF products are installed.  For other owners/structures, Lifetime coverage is not applicable.  Lifetime coverage on shingles requires the use of GAF Lifetime Shingles only.  Lifetime coverage on shingles and accessories requires the use of any GAF Lifetime Shingle and any 3 qualifying GAF Accessories.  See GAF Roofing System Limited Warranty for complete coverage and restrictions.  Visit for qualifying GAF products.  For installations not eligible for the GAF Roofing System Limited Warranty, see the GAF shingle & Accessory Limited Warranty.
2Deck-Armor™ Breathable Roof Deck Protection has earned the Good Housekeeping Seal (applicable in U.S. only).
3GAF trapezoidal tear strength testing per ASTM D4533.
4Contact GAF Technical Services at 1-800-ROOF-411 for acceptable non-asphaltic roof systems and limited warranty coverage.
5180-day UV resistance refers to standardized testing conducted to ensure the product will not physically degrade when exposed to UV. It is NOT related to withstanding water, snow, or wind. While Deck-Armor™ Premium Breathable Roof Deck Protection is water resistant, it is NOT WATERPROOF. DO NOT USE Deck-Armor™ Premium Breathable Roof Deck Protection as a temporary roof to protect property or possessions.

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Get automatic Lifetime Protection on your entire GAF roofing system

When you install any GAF Lifetime Shingle and at least 3 qualifying GAF accessories, you’ll automatically get a Lifetime limited warranty on your shingles and all qualifying GAF accessories*.