Architects and Specifiers

For performance and innovation in complete roofing systems, talk to GAF first.


As part of our commitment to top-quality products, GAF supports the ongoing training and continuing education needs of the market. On this page you’ll find links to continuing education curricular, from white papers to webinars, and industry articles to GAF blog discussions

Check out upcoming webinars & events hosted by the GAF Building & Roofing Science Team

Office Hours with The Building & Roofing Science Team

Book a thirty-minute time slot with the GAF Building & Roofing Science team members to discuss your project-specific questions, code conundrums, head scratchers, impossible details, or building & roofing science ponderings. Share your screen and we'll work through it together!

Office Hours will be open one day each month from 12-4pm ET.
September 30th
October 28th
November 24th
December 17th








Featured White Papers    See all 

Insulation Value Optimization For Low Slope Roofs

Thomas J. Taylor, James Willits, Christian A. Hartwig, and James R. Kirby

Assessing Retrofit Single-Ply Roof Systems Installed Over Existing Metal Panel Roof Systems

James R. Kirby and Jennifer Keegan

Reflective Roofing Use on Commercial Buildings in the United States: An Energy Type and Cost Analysis

Thomas J. Taylor

Structural Concrete Decks, Vapor Retarders, and Moisture - Rethinking What We Know

Helene Hardy Pierce and Joan P. Crowe


Cool Roof Use in Commercial Buildings in the United States: An Energy Cost Analysis

Thomas J. Taylor

Physical Testing for Wind Resistance of Retrofit Single-Ply Roof Systems Over Structural Metal Panel Roof Systems

James R. Kirby and Jennifer Keegan

Simplifying the Complicated Process of Wind Design for Roof Systems

Joan P. Crowe and James R. Kirby

Eliminating Fastener Thermal Bridging in Low Slope Roofs: Energy Efficiency Savings versus Installation Costs

Thomas J. Taylor

Polyiso Foam Insulation: A Refresher

Thomas J. Taylor

TPO performance that's proven to stand the test of time

A recent study of EverGuard® TPO roofs installed between 8 and 16 years ago found the all performed above ASTM standards for newly manufactured TPO. GAF analyzed membrane samples from roofs across the US and studied thickness over scrim, surface cracking, and the ability to repair aging TPO membranes.

Featured Blogs    See all 

Parapets — Continuity of Control Layers
Air Barriers and Vapor Retarders: The Current Conundrum
Are You Considering Adaptation in Your Roof Design?
Roof Design Considerations When Incorporating Solar
Solar-ready design for low slope roofs
How to specify roofs for cold storage and freezer buildings

Continuing education for AIA credit

Addressing Moisture Durability and Energy Performance in Roof AssembliesContinuing Education Center WebinarA Critical Review of Multiple Voluntary Green Building CertificationsVIEW DETAILS
Cold Storage Roof DesignContinuing Education Center WebinarCold storage buildings are often thought of as a typical building turned inside out. These buildings are designed to keep heat out, instead of keeping heat in during cold weather. But is it that simple? We will review the importance of unique construction assemblies, the primary control layers, and how we need to think about them in this inside out scenario to reduce the risk of condensation.VIEW DETAILS
Commercial Rooftop Solar: Maximizing a Stellar OpportunityContinuing Education Center WebinarExpanding Solar Power Generation through DesignVIEW DETAILS
Decoding Commercial Roofing CodesContinuing Education Center WebinarBuilding codes provide the minimum requirements for the construction of roofs in North America. This session looks at how the model codes and standards influence and guide low-slope commercial roofing.VIEW DETAILS
Cool Roofing for Cool ClimatesContinuing Education Center ArticleTPO and PVC membrane reflective roofs continue to prove their effectiveness in all climate zones, debunking myths that cool roofing is only suitable in warm environmentsVIEW DETAILS
Maximizing Roof System Energy Efficiency and PerformanceContinuing Education Center ArticleThis webinar will review air flow withing roof systems, the impact of insulation levels and fasteners, thermal bridging, the role of reflective roofing and the impact of geographic location, and the components needed to design and energy efficient roof system.VIEW DETAILS
Parapets—Continuity of Control LayersContinuing Education Center ArticleParapet continuity of detailing required to manage moisture, air, vapor and thermal performance, as well as wind resistance requirements at the critical wall-to-roof interface.VIEW DETAILS
Parapet Predicaments and Roof Edge ConundrumsContinuing Education Center WebinarDiscuss requirements to manage moisture, air, vapor and thermal continuity.VIEW DETAILS
Resilient Roof SystemsContinuing Education Center WebinarRoofs are the first line of defense against ever-increasing and ever-stronger weather events. How do you design roofs for long-term wind resistance; are you making the correct assumptions? Do you consider roof edges when designing for wind? What about impact resistance; are you including the correct components to increase toughness? Did you know overall system attachment, insulation design, and roof color affect long-term resilience? Let’s discuss how to build truly great roofs!VIEW DETAILS
Retrofit Single-Ply Roof Systems over Metal Panel RoofsContinuing Education Center WebinarWhat are current market practices, best practices and industry concerns for wind resistance?VIEW DETAILS
R-Value Optimization for Low-Slope RoofsContinuing Education Center WebinarAre you getting what you paid for?VIEW DETAILS
Wind Design and Value EngineeringContinuing Education Center WebinarRoofs are the first line of defense against ever-increasing and ever-stronger weather events. And, contrarily, value engineering (VE) is becoming, if it isn’t already, much more of the norm in the roofing and construction industries. This presentation will present the complexities of wind design and options for long-term performance. The potential pitfalls of value engineering of roof systems and ways to assess overall performance based on life cycle versus initial costs will be discussed.VIEW DETAILS
Air Barriers And Vapor Retarders: The ConundrumAEC Daily Online CourseThis presentation provides the practical side to the AB/VR discussion and identifies common VRs and ABs, how they're installed, and why AB/VR approaches vary according to the type of construction and building use.VIEW DETAILS
Building Energy Efficiency & Roof DesignAEC Daily Online CourseThis course examines how the roof of a building—one of the few parts of a building envelope that undergoes periodic replacement—impacts energy efficiency. It also explores how roof design can be a key contributor to meeting both sustainability and energy operating cost goals.VIEW DETAILS
Low Slope Roofing: Why Choose Thermoplastic Single-Ply Roofing Systems?AEC Daily Online CourseWith a focus on commercial roofing systems, this course explores the drawbacks of traditional asphaltic roofing, as well as the advantages and disadvantages of single-ply roofing systems and their attachment technologiesVIEW DETAILS
Single-Ply Roofing Systems ExposedAEC Daily Online CourseThis course reviews the most prevalent membranes and describes the advantages and disadvantages of EPDM, PVC, and TPO. An overview of attachment methods is presented as well as a discussion of single-ply system strength, cool roof benefits, and condensation issues from a building science perspective.VIEW DETAILS
Steep Slope Roofing: Ventilation SolutionsAEC Daily Online CourseThis course discusses principles of proper ventilation in houses with steep-slope roofing—from the science behind moisture and airflow to the products used to assist ventilation through a structure.VIEW DETAILS

Interested in a Lunch & Learn for AIA Credit?

Call GAF Architectural Information Services (AIS) at 1-800-522-9224 or email at

Designing for Moisture Durability and Energy Efficiency, Part 2 Part 1 of our discussion of Designing for Moisture Durability and Energy Efficiency explored the driving forces that result in the increasing interactive complexity and tight coupling of roofs and other building systems in modern green buildings. Part 1 also provided an overview of the various project life-cycle phases and compared the top green rating system's scope to address or not address moisture durability in those phases.
How Designers & Super Crews Can Maximize Roofing EfficiencyThis case study looked at how a roof system designer, working with an expert crew, can both increase roofing efficiency and offer performance advantages to the building owner.
Ventilation for steep-slope roof assemblies is often misunderstood. One must not only understand the code requirements, but be able to translate them into real-world installations. Building codes have requirements for ventilation of steep-slope attics and enclosed rafter spaces. Balanced ventilation — nearly equal amounts of intake and exhaust — typcially provides efficient ventilation. Transitions between low-slope and steep-slope roof areas require more distinct intake and exhaust details than traditional eaves/soffits and ridges.
Thermal insulation is an important part of commercial roofing assemblies. The aim of this article is to examine the factors influencing the thermal resistance, known as R-value of polyiso. The prediction of long term R-value and the influence of climate, i.e. temperature, have been of significant interest over the past few decades as building energy budgets have increased in importance. Recent discussions as to what R-value the designer should use and the importance of ambient temperature are reviewed and discussed.

Stay current on commercial roofing system design and performance.

Sign up for our building science newsletter.