SKU: 5939524023

GAF FeltBuster Synthetic Roof Underlayment, 48 in x 250 ft (1000 sq ft)

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Description

GAF FeltBuster Synthetic Roof Underlayment, 48 in x 250 ft (1000 sq ft)GAF FeltBuster Synthetic Roof Underlayment (48" x 250') GAF FeltBuster is a high traction synthetic roofing underlayment designed to protect decks beneath shingles. The durable polypropylene construction resists tearing and moisture while its medium gray surface stays cooler than traditional black felt for easier installation. Key Features: Enhanced Traction Surface: Special spunbond top layer improves walkability compared to typical asphalt felts

GAF FeltBuster Synthetic Roof Underlayment (48" x 250')

GAF FeltBuster is a high-traction synthetic roofing underlayment designed to protect decks beneath shingles. The durable polypropylene construction resists tearing and moisture while its medium-gray surface stays cooler than traditional black felt for easier installation.


Key Features:

  • Enhanced Traction Surface: Special spunbond top layer improves walkability compared to typical asphalt felts
  • Durable Synthetic Build: Non-asphaltic polypropylene resists tearing, moisture absorption, brittleness, and oil leaching
  • Cooler Working Surface: Medium-gray finish can be up to 30°F cooler than black felt for more comfortable installs
  • Lightweight, Wide Roll: 48-inch width and 10-square coverage per roll speeds application over large areas
  • Better Aesthetics: Lies flatter to reduce wrinkle telegraphing for a cleaner-looking roof

Specifications Table:

Specification Details
Series Name FeltBuster
Type Roof deck protection
Material Synthetic (Non-asphaltic polypropylene)
Application Method Nail
Underlayment Grade #30
Coverage Area 1000 sq ft
Length 250 ft
Width 48 in
Weight 23 lbs
Warranty Limited lifetime (when part of GAF Lifetime Roofing System)
For Use with Asphalt Shingles Yes
For Use with Metal Roofing No
For Use with Wood Shakes No
For Use with Flat Roofing Yes
Prop 65 Warning (CA) No
UNSPSC 30151500

Frequently Asked Questions (FAQ):

Q: Is FeltBuster waterproof?
A: No—it's water-resistant and intended as a secondary water-shedding layer beneath the primary roof covering.


Q: What roofing materials is it compatible with?
A: Designed for use under asphalt shingles; not intended for metal or wood shakes. Listed as suitable for flat roofing in specs.


Q: How is it installed?
A: Install with nails following printed fastening guides on the sheet; use as underlayment, not as a temporary roof.


Q: What is the coverage per roll?
A: Each 48 in x 250 ft roll covers 1,000 sq ft (10 squares).


Q: Does it come with a warranty?
A: Eligible for a Limited Lifetime Warranty when part of a GAF Lifetime Shingles roof, per GAF warranty terms.


A Sleek, High-Performance Base for Beautiful Rooflines

FeltBuster’s cool gray surface lays impeccably flat, creating a refined foundation that elevates any shingle pattern. I love the wide-format roll—it streamlines coverage and keeps seams clean for a polished silhouette. Pair it with dimensional shingles and crisp metal accents to highlight roof geometry. It’s a discreet essential that ensures a resilient, luxe finish from the very first layer.


Upgrade your roof’s first line of defense with GAF FeltBuster for durable, cooler, and easier installation performance.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 5939524023

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Mariel
Belleville, US
★★★★★ 5
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These bamboo underwear really do keep you cool. They fit true to size, and wear easily. the wide elastic waist band doesn't roll on me. They are comfortable to wear, washed and dried easily. The material has some stretch to it, but not a lot. Well made, no stray strings. Perfect fit for me. Just what I was looking for.
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Reviewed in the United States on May 17, 2026
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Finngirl
Port Orchard, US
★★★★★ 5
Good quality, smooth feel
I got these briefs so recently that have washed just one pair so far. First off, these are very comfortable, the material is soft & bordering silky, good quality sewing. Wash well and minimal if any shrinkage. They do come a bit wrinkled from the dryer but hey, these are underwear and will go on smoothly. If it were a t-shirt, I would look sloppy. I feel the sizing is accurate. No rolling and these don't announce themselves under clothing. Planning on getting more of these boxers and replacing my old panties.
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Reviewed in the United States on January 31, 2026
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Skurtzo
Lake Worth, US
★★★★★ 4
A little snug on the thighs
Size: Medium, Color: Multicoloured G (5-pack)
Super comfy, soft and thin. For reference, I'm 5'6", 135, athletic build. I bought medium. I almost returned them because I thought they were a bit too snug on my thighs, and my thighs are not large at all. I was concerned about panty lines under snug clothing. But, because they're thin, I figured they would probably stretch, so I kept them. So far, I've only worn them under a night shirt, but they're super comfortable and they dont ride up at all. Very nice, but if your thighs are a little thick, you probably won't like them.
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Reviewed in the United States on August 29, 2025
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Shanna
Dallas, US
★★★★★ 5
Functional + Sexy
Size: Small, Color: Multicoloured E-(5-pack), Size: Small, Color: Multicoloured E-(5-pack)
Not only do these feel good, my husband can’t keep his hands off me. They fit so good and are soft. I change into these to sleep but also just use them as shorts to wear around the house. They’re comfortable and don’t slide around. I got a size small and I’m 100lbs.
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Reviewed in the United States on April 13, 2026
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ClairY
Omaha, US
★★★★★ 5
Finally!
Size: X-Large, Color: All Black D (5-pack)
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