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

Mechanically Attached
Metal fasteners help prevent wind uplift

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Adhered
Adhesives create a tight, uniform seal

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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

Adhered
Adhesives create a tight, uniform seal

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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

Adhered
Adhesives create a tight, uniform seal

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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

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

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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.