Architects and Specifiers Submittals Made Simple

Roof system specifications

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TPO Smooth

A popular choice with more than 300 million sq. ft. installed annually

Components of the GAF smooth TPO mechanically attached roofing system with metal fasteners

Mechanically Attached
Metal fasteners help prevent wind uplift

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Components of the smooth TPO adhered roofing system by GAF with adhesive

Adhered
Adhesives create a tight, uniform seal

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Components of the GAF smooth TPO induction welded roofing system using electrical heating

Induction Welded
Electrical heating can save on time and labor

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TPO, Fleece-Back Systems

A thicker membrane that helps protect against hail and other impacts

Components of the fleece-back TPO adhered roofing system by GAF using adhesives

Adhered
Adhesives create a tight, uniform seal

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Components of the GAF fleece-back TPO mechanically-attached roofing system using metal fasteners

Mechanically Attached
Metal fasteners help prevent wind uplift

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TPO, high-impact Systems

Reinforced systems that minimize damage from hail and other impacts

Components of the Impact-resistant TPO adhered roofing system by GAF using adhesives

Adhered
Adhesives create a tight, uniform seal

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Components of the Impact-resistant TPO induction welded roofing system by GAF using electrical heating

Induction Welded
Electrical heating can save on time and labor

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Asphaltic systems

Reinforced systems that minimize damage from hail and other impacts

Components of the APP, Torch-Applied, Modular Bitumen roofing system by GAF

APP, Torch-Applied
Atactic polypropylene applied by torch for durability against leaks and extreme weather

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Components of the SBS, Cold-Applied, Modular Bitumen roofing system by GAF

SBS, Cold-Applied
Styrene-butadiene-styrene applied with cold adhesive for flexibility and durability

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SBS, Heat-Welded
Styrene-butadiene-styrene applied by torch for flexibility and durability

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System highlights

Mechanically Attached - Provides excellent wind uplift resistance and can be installed quickly and easily, making it a popular choice for commercial and industrial roofs.

Adhered - Enhances performance and insulation by providing excellent wind uplift resistance and code approvals. It helps maintain a higher R-Value and minimizes membrane flutter.

Induction Welded - Boosts productivity with faster installation and fewer screws/plates. It enhances performance with better wind resistance and eliminates half sheets, reducing membrane flutter.

Torch Applied - Offers cost-effective, lightweight roof designs with durable, long-lasting performance thanks to its specially formulated modified asphalt.

Cold Applied - Consider Cold Applied roofing for safety, foot traffic, and hard-to-reach roofs. It’s cost-competitive and reduces clutter from equipment.

Heat Welded - Heat Welded roofing is characterized by low maintenance requirements, the ability to be installed in cool weather, and easy repair after installation.

Complex project? Get professional assistance with a custom package

Your regional GAF design services team can help put together a custom specification package, quickly and accurately. Start by choosing your roof type below.

Low Slope Steep Slope

Design best practice guides and resource files

Download all

• BIM & REVIT Library	• Cold Storage Roof System Design Guide
• TPO & PVC Detail Video Library	• How to Use ASCE 7-16
• TPO & PVC Architectural Detail Guide	• Single-Ply Interactive Pro Field Guide
• Attachment Tables for TPO & PVC Guide	• Photovoltaic Installations on Guaranteed Roofing Systems
• Metal Roof Retrofit in Commercial Low-slope Assemblies	• Air Barrier Guide
• Vapor Retarder Design in Low-slope Roof Systems Guide	• VSH Single-Ply Guide

Discover our wide range of roofing systems

GAF offers you a full line of roofing system solutions, including single-ply membrane, asphaltic coatings, and liquid-applied roofing, as well as waterproofing, polyiso insulation, and a complete line of innovative adhesives and accessories.