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Deck-Armor 400 sq. ft. Premium Breathable Synthetic Roofing Underlayment Roll

$15743
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  • Reduces inside moisture from becoming trapped in roofing system
  • Offers excellent traction for installers
  • Tough synthetic construction for exceptional tear resistance
  • View More Details

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Price:
$15743

Product Overview

GAF Deck-Armor Premium Breathable Underlayment provides a critical layer of protection under your asphalt shingles against wind-driven rain and other sources of moisture. Its unique breathable technology allows inside moisture to escape the roof system, helping to prevent premature roof system deterioration. Made of tough synthetic materials, it resists tearing and helps ensure long-lasting protection. Each roll of Deck-Armor contains 400 sq. ft., excluding laps
  • Breathable technology helps reduce inside moisture from becoming trapped in the roof system which can lead to structural decay, mold or mildew
  • Polypropylene synthetic construction will not rot or become brittle over time (like conventional asphalt felts)
  • Spunbond top surface helps ensure excellent traction and walkability during installation
  • Resists wrinkling or buckling to help avoid ugly telegraphing through the finished roof
  • 48 in. x 100 ft. roll size - each roll contains 400 square feet - excluding laps
  • Can withstand UV degradation for up to 180 days, if necessary
  • For use under asphalt shingles and other roof systems such as metal, slate or wood
  • Part of the GAF Lifetime Roofing System and eligible for Lifetime ltd. warranty when installed on Lifetime Shingle roofs (See GAF Shingle & Accessory Ltd. Warranty for complete coverage and restrictions
  • This product is water-resistant, it is NOT waterproof. It is intended as a secondary layer of water-shedding protection underneath the primary roof covering, such as asphalt shingles. Do NOT USE as a temporary roof or “dry-in” solution to protect property or possessions.
  • Also available in a 1000 square foot roll - excluding laps

Info & Guides

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Price
$15463
/roll
$15743
$23101
/roll
$25804
/roll
Ratings
(31)
(7)
(79)
(6)
Underlayment/Barrier TypeSynthetic UnderlaymentSynthetic UnderlaymentSynthetic UnderlaymentSynthetic Underlayment
Application MethodNailNailPeel & StickNail
FeaturesWaterproofMildew Resistant,WaterproofNo Additional FeaturesAlgae Resistant,Waterproof
Unrolled length (ft.)25010075222
Product Width (in.)48 in483654
Product Thickness (in.)0.0313 in6.5 in.007 in9 in
Fire Rating (UL 790)Class ANo Rating AvailableClass ANo Rating Available
MaterialFeltFeltResinFelt
Roofing Product TypeUnderlaymentUnderlaymentUnderlaymentUnderlayment
Surface RecommendedWoodMetal,WoodConcrete Roofs,Metal,WoodMetal,Metal Roofs,Wood
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Specifications

Dimensions

Coverage Area (sq. ft.)
400
Product Thickness (in.)
6.5 in
Product Width (in.)
48
Unrolled length (ft.)
100

Details

Application Method
Nail
Color Family
White
Features
Mildew Resistant,Waterproof
Fire Rating (UL 790)
No Rating Available
Material
Felt
Product Weight (lb.)
15 lb
Returnable
90-Day
Roofing Product Type
Underlayment
Squares (100sq. Ft)/Roll
4
Surface Recommended
Metal,Wood
Texture
Smooth
Underlayment/Barrier Type
Synthetic Underlayment

Warranty / Certifications

Manufacturer Warranty
25 Year Limited Warranty

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 4.8
    out of 7 reviews
  • 100% recommend this product
Filter by:
Showing 1-7 of 7 reviews
Other Possible Uses
I realize this is a roofing product, but I'm thinking that due to its breathable nature, and the synthetic strength of the product, it could be used over insulation, say under a mobile home, or in my case the basement of my barn over the floor joists (insulation) where a vapor barrier would not work. What are your thoughts?
by MYMAINE1
    • Recommended Product
    2 people found this helpful
    Excellent product. Well reviewed by installer also.
    Excellent product. Well reviewed by installer also.
    by Ben
    • Verified Purchase
    • Recommended Product
    Disappointed
    I bought this thinking it would be the cats meow. Very similar to VaproSheild. Not as waterproof as it looks or claims to be. Super easy to install, but doesn’t hold up well to a mid to heavy rain. If you’re looking to temporarily be water and weather tight before roof cladding, this doesn’t do the task. It’s almost like it absorbs water before it repels it.
    by Andrew T
    Response from GAFProductExpertDec 11, 2020
    Hello, thanks for the feedback. However, this product is not intended for use as waterproofing or watertight before the primary roof covering, such as shingles, are installed. This is clearly explained in the installation instructions on each roll. It is intended as a water-shedding underlayment for use under the primary roof covering. For a dry-in solution, you should probably consider a peel and stick waterproof underlayment or potentially tarping the roof before you're ready to install the final roof covering. Thank you for your feedback. gaf
    • Verified Purchase
    Installation excellent.
    Cannot comment on long-term performance as just finished installing. But this product is easy to cut, VERY tough for abrasion-resistance and tearing. Decent slip resistance. Would definitely use it again.
    by DIYmyomy
    • Verified Purchase
    • Recommended Product
    Very durable, stands up to strong winds...
    Very durable, stands up to strong winds
    by HomeDepotCustomer
    • Verified Purchase
    The underpayment was easy to lay and the lines on...
    The underpayment was easy to lay and the lines on it is very helpful
    by HomeDepotCustomer
    • Verified Purchase
    1 person found this helpful
    Highly Recommended
    After deciding to replace the shingles on a leaky section of roof I picked up some deck armor and other products from home depot. Not having done any roofing for decades it took a little longer than I thought it would. At one point, with half the roof shingled, I ran out of daylight. Nothing to do but duct tape the deck armor (where nailed, and on appropriate edges) and hope it didn't rain. At 5:00am I wake up to sound of pouring the rain. It rained for about 8 hours with just the deck armor on the upper half of the roof. No leaks! The product doesn't claim to be waterproof but it saved my bacon big time. Also, walking on it in the middle of day to make sure everything was secure was easy as it wasn't slippery at all. I do recommend having someone to help put on this product if you live in an area that is windy. The wind can catch the material and blow it out of position quite easily.
    by ASmithNL
      • Recommended Product
      Showing 1-7 of 7 reviews