When the project demands the highest standard in traditional felt underlayment, the G.A.P. ASTM 30 D226 Type 2 from A1A Wholesale Supply is the premier choice. Weighing in at a substantial 56 lbs per roll, this product is manufactured from a superior-quality organic mat that is deeply saturated with asphalt to provide maximum protection against the elements.

This underlayment is engineered for durability and longevity, making it the preferred substrate for premium architectural shingles, tile, and metal roofing in regions prone to severe weather. Its heavy-duty construction ensures it lays flat on the roof deck, providing a stable, wrinkle-free surface that resists tearing and degradation during the critical “dry-in” phase of construction.

Product Details

• Manufacturer: G.A.P. Roofing, Inc.

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

• Classification: ASTM D226 Type 2 (Heavy-Duty).

• Approvals: * Miami-Dade County Approved

  • Florida Building Code Approved (FL #2894.5)

• Roll Width: 36 inches.

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

• Weight: 56 lbs per roll.

• Logistics: 25 rolls per pallet / 32 pallets per truckload.

Features & Benefits

• Maximum Weather Resistance: High asphalt saturation levels provide an industry-leading barrier against wind-driven rain and moisture.

• Superior Strength: The heavy organic mat provides exceptional tensile and tear strength, standing up to rigorous foot traffic and extreme wind conditions.

• Flat-Laying Performance: The heavy weight of the roll ensures the material stays flat against the deck, preventing buckling and “telegraphing” through the finished roof.

• Rigorous Code Compliance: Meets both Miami-Dade and Florida Building Code standards, the most stringent requirements in the United States.

• Versatile Compatibility: Ideal for use under a variety of primary roofing materials, including architectural shingles, slate, and certain tile applications.

Applications

• High-Wind & Coastal Zones: The standard for roofing projects in hurricane-prone areas requiring Miami-Dade approval.

• Premium Residential Projects: Essential for high-end homes where a 30lb-class, D226-certified underlayment is specified.

• Commercial Roofing: Durable enough for use on commercial and multi-family sloped roof systems.

• New Construction & Re-roofing: Provides a robust, high-performance dry-in layer for any professional roofing project.

Specifications & Logistics Reference