For contractors seeking a multi-purpose waterproofing solution, the G.A.P. 55# Smooth Organic roll from A1A Wholesale Supply is an industry staple. This heavyweight sheet undergoes a rigorous manufacturing process: superior organic felt is deeply saturated with asphalt, then coated on both the top and bottom with weathering-grade asphalt. A light dusting of mineral surface fines is applied to prevent the roll from sticking, ensuring a smooth, frustration-free install even in high-heat environments.

This product excels in “high-water” zones. Its dense composition makes it an ideal valley liner or eave protection layer for residential shingle roofs. Furthermore, when installed with hot asphalt, it serves as an excellent vapor retardant for commercial assemblies. Its consistent 36-inch width and 55 lb. weight provide the structural integrity required to bridge deck imperfections and provide a long-lasting secondary water barrier.

Product Details

• Manufacturer: G.A.P. Roofing, Inc.

• Category: Low-Slope & Residential Waterproofing.

• Material: Asphalt-saturated organic felt with dual-sided weathering-grade coating.

• Finish: Smooth mineral surface fines.

• Roll Width: 36 inches.

• Coverage: 108 sq. ft. (1 Square) per roll.

• Weight: 55 lbs per roll.

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

Features & Benefits

• Double-Coated Durability: Weathering-grade coating on both sides ensures a superior moisture barrier and extended product life compared to standard saturated felts.

• Versatile Application: Effectively transitions from a commercial BUR base sheet to a residential valley and edge liner.

• Vapor Retardant Capabilities: When applied with hot asphalt, it creates a high-performance vapor barrier for sensitive roof assemblies.

• Heavyweight Protection: The 55 lb. construction provides extra puncture resistance and a stable walking surface for crews.

• Anti-Stick Surface: Mineral fines allow for easy unrolling without the tearing or “picking” often associated with asphalt-rich products.

Applications

• Built-Up Roofing (BUR): Applied over flat roof decks or insulation as a high-strength base layer.

• Residential Valley Lining: Provides a reinforced waterproof layer in the most leak-prone areas of a shingle roof.

• Low-Slope Waterproofing: Ideal for porch roofs, transitions, and eaves where water can accumulate.

• Vapor Barriers: Used in multi-ply systems to prevent moisture migration into the building envelope.

Technical Specifications & Logistics