Roof system specifications
Download 3-part CSI specifications
View our new Roof Designer's Guide Book for an introduction of essential low-slope roofing concepts — from system components to codes, and sustainability to GAF support services — as well as an overview of GAF products that may be right for your specification.
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.
Design best practice guides and resource files
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.
Promote positive drainage with tapered design
View tapered resourcesTap into GAF's professional resources
Design Services
Product and tech support, custom
solutions, code assistance, and more
877-423-7663 Option 4, then Option 3
Email us solutions, code assistance, and more
877-423-7663 Option 4, then Option 3
Tapered Design
Regionalized Design Specialists
who provide tapered solutions.
800-766-3411 or TDG@gaf.com
View tapered who provide tapered solutions.
800-766-3411 or TDG@gaf.com
Building & Roofing Science
Book a virtual meeting to get free
advice on your project-specific questions,
code conundrums, and impossible details.
Schedule advice on your project-specific questions,
code conundrums, and impossible details.
Territory Manager
Talk to a professional who knows
your regions and is dedicated to
serving your business needs.
Find a TM your regions and is dedicated to
serving your business needs.