Fiberglass-reinforced felt roof underlayment, 400 sq ft

Durable felt underlayment reinforced with fiberglass for flatter, more uniform shingle installation. Designed to help prevent water infiltration and resist tearing during installation. Ideal 36-in x 141.5-ft roll covers 400 sq ft for efficient roofing projects.

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Key Features:

• Fiberglass Reinforcement: Supports flatter, uniform shingle applications and added strength
• Water Protection: Helps prevent water infiltration from wind-driven rain under shingles
• Tear-Resistant Durability: Stronger than standard felt; stands up to foot traffic and wind during install
• Efficient Coverage: Convenient 400-sq ft roll size for fewer seams and faster installation
• Nail Application: Compatible with asphalt shingles; straightforward fastening

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Specifications Table:

Specification	Details
Series Name	Fiberglas Reinforced Felt
Coverage Area (Sq. Feet)	400
Length (Feet)	141.5
Width (Inches)	35 (trusted title lists 36 in)
Application Method	Nail
For Use with Asphalt Shingles	Yes
For Use with Flat Roofing	No
For Use with Metal Roofing	No
For Use with Wood Shakes	No
Ice and Waterproofer	Yes
Material	Felt
Warranty	None
CA Residents: Prop 65 Warning(s)	Yes
UNSPSC	30151500

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Frequently Asked Questions (FAQ):

Q: What roofing types is this underlayment compatible with?
A: Designed for use with asphalt shingles; not intended for flat, metal, or wood shake roofing.

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Q: How is it installed?
A: Apply over the roof deck and fasten with nails, following local codes and manufacturer instructions.

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Q: Does it provide water resistance?
A: Yes—when properly installed it helps prevent water infiltration from wind-driven rain under shingles.

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Q: What is the roll size and coverage?
A: Each roll is approximately 36 inches wide by 141.5 feet long and covers 400 square feet.

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Q: Is there a warranty?
A: No manufacturer warranty is listed for this product.

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A Sleek, Resilient Foundation for Refined Rooflines

This fiberglass-reinforced felt lays down a refined, uniform base that elevates the silhouette of any shingled roof. I love its confident black finish—clean lines that promise both beauty and performance. Pair it with architectural shingles in cool charcoal tones for a crisp, modern envelope. A smart, resilient underlayment like this is a quiet luxury—essential to a roof that looks impeccable and lives well.

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Strengthen your roof’s performance and finish—add this Owens Corning fiberglass-reinforced felt underlayment to your project today.