When installing high-end architectural or laminate shingles, the substrate requires a more substantial barrier than basic utility felt. The G.A.P. #30 ASTM D 4869 Type II Felt from A1A Wholesale Supply is specifically formulated for these demanding applications. Manufactured from superior-grade organic matting and deeply saturated with asphalt, it provides a thick, protective “cushion” that shields the roof deck.

This underlayment is a favorite among contractors in high-moisture regions due to its official Florida Building Code Approval. Its weight and composition allow it to lay remarkably flat, significantly reducing the risk of “telegraphing” wrinkles or deck imperfections through the finished shingles. This ensures a clean, professional aesthetic for high-profile residential projects.

Product Details

• Manufacturer: G.A.P. Roofing, Inc.

• Material: Premium asphalt-saturated organic felt.

• Classification: ASTM D 4869 Type II (High-Performance).

• Code Approval: Florida Building Code Approved (FL #2894.3).

• Roll Width: 36 inches.

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

• Weight: 32 lbs per roll.

• Logistics: 30 rolls per pallet / 44 pallets per truckload.

Features & Benefits

• Architectural Grade: Highly recommended as the standard underlayment for architectural and dimensional shingles.

• FL Building Code Approved: Tested and certified to meet the rigorous standards of the Florida Building Code, making it ideal for coastal and high-wind regions.

• Superior Lay-Flat Properties: Engineered to minimize buckling and curling, providing a smooth, uniform surface for the primary roofing material.

• Heavy-Duty Moisture Barrier: The Type II saturation level provides an enhanced secondary water barrier against wind-driven rain and ice dams.

• Installer Safety: The classic organic felt texture provides reliable traction for crews working on various roof pitches.

Applications

• Premium Residential Roofing: Specifically designed for use under architectural and laminate shingles.

• Coastal & High-Humidity Zones: Perfect for areas requiring Florida Building Code (FBC) compliance.

• New Construction & Re-roofing: Provides a durable “dry-in” layer that protects the building envelope before the final roof is installed.

• Note: This product is not recommended for use with standard 20-year 3-tab shingles.

Specifications & Logistics Reference