When your project specifications demand a higher level of material performance, the G.A.P. ASTM 15 D226 Type 1 Felt from A1A Wholesale Supply is the definitive choice. Unlike standard #15 felts, the D226 designation signifies a more robust organic mat and a higher asphalt saturation level, resulting in a heavier, more resilient roll that weighs approximately 52 lbs.

This underlayment is designed to provide a “flat-laying” foundation that resists wrinkling and puckering, even when exposed to ambient moisture. By meeting the ASTM D226 Type 1 standard, it ensures compliance with the most rigorous building codes and manufacturer warranty requirements for asphalt shingle systems.

Product Details

• Manufacturer: G.A.P. Roofing, Inc.

• Material: Superior-grade asphalt-saturated organic felt.

• Classification: ASTM D 226 Type 1.

• Roll Width: 36 inches.

• Coverage: 216 sq. ft. (2.16 squares) per roll.

• Weight: Heavy-duty at 52 lbs per roll.

• Logistics: 25 rolls per pallet / 34 pallets per truckload.

Features & Benefits

• High-Strength Composition: Manufactured from a superior organic mat that provides higher tear resistance and better tensile strength than standard utility-grade felts.

• Enhanced Waterproofing: Deeply saturated with asphalt to provide an impermeable barrier against wind-driven rain and ice.

• Superior Lay-Flat Properties: The increased weight and density help the material lay flatter on the deck, reducing the risk of “telegraphing” wrinkles through the shingles.

• Code Compliance: Specifically engineered to meet ASTM D226 Type 1, making it suitable for both residential and light commercial specifications.

• Professional Grade: The heavier weight per square foot ensures a more durable walking surface and better protection for the roof deck during the dry-in phase.

Applications

• Premium Residential Roofing: Ideal for use under architectural and high-end asphalt shingles.

• Strict Code Requirements: Used in regions or for projects where ASTM D226 is the mandated minimum standard for underlayment.

• New Construction & Re-roofing: Provides a long-lasting secondary water barrier for all sloped roof applications.

• Commercial Shingle Projects: Heavy-duty enough for multi-family and commercial sloped roofs.

Technical Specifications & Logistics