Building and Roofing Science Team
Who we are
Our team of regionalized Building & Roofing Science professionals includes architects, engineers, building scientists, innovative educators, and industry collaborators with a passion for complex problem solving, knowledge transfer, and best practices, ready to offer step-by-step collaboration with your project’s unique challenges.
Contact your building science professional Continuing education & trainingHow we can help
Detailing air barriers & vapor retarders
Optimizing your assembly for energy efficiency
Understanding sustainable assembly options
Designing a vegetative roof
Creating a resilient roof system
Navigating specialty installations
Wind design for roofs
Specification & detail review
Roofing & enclosure knowledge hubs
Real-World Solutions: Insights from the Roof Views Blog
Essays and insights from Building and Roofing Science specialists and guest writers.
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Deep Dives: Expert Building Science Journal Articles
Published references from a wide array of esteemed professional journals.
Read now
Master the Essentials: Your Building Science Survival Guide
Your practical easy-to-navigate guide to roofing and enclosure resources.
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Meet the Building Roofing Science team:
Connect directly with a dedicated roofing and enclosure professional.
Jennifer Keegan
AAIA
Senior Director, Building & Roofing Sciences
jennifer.keegan@gaf.com
973.255.0436
Andrea Wagner Watts
LEED Green Associate
Building Science Technical Insights Lead
andrea.watts@gaf.com
703.489.4117
Tim Clepper
AIA, RRC, RRO, ICCce, CIT, NCARB
Southwest Building Design Manager
tim.clepper@gaf.com
346.375.9778
Building Science at the GAF Roof Views blog
Why Do I Need a Coverboard?
Building Science
Coverboards can be important components of commercial roof assemblies. They can increase the resilience and durability of the roof by helping it better withstand environmental exposure, wind uplift, and long-term wear. In certain circumstances, coverboards can be absolutely essential to the longevity of a roofing system.
November 25, 2025
Understanding the Layers of a Single-Ply Roofing Assembly
Building Science
Single-ply roof membranes are a common choice for commercial low-slope roofing projects due to its durability, reflectivity, and ease of installation. The membrane is the top of a multi-layer assembly designed to help protect the building from the exterior elements.
November 10, 2025
A Practical Guide to Single-Ply Roofing Attachment Methods
Building Science
When designing your next low-slope roof assembly, there are a number of single-ply roofing attachment methods to consider. Whether you choose a TPO, PVC, or EPDM membrane, the attachment method you select will typically be influenced by the building type and location, the rest of the roof assembly, and the construction schedule and cost.
July 24, 2025
Design resources quick links
Tapered Design Group
Detailed, high-quality solutions that can help you deliver on every project.
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Editable details
Customize details, without using CAD, with our interactive detail PDFs.
Interactive details
Real world solutions and studies
10 World Trade
A Creative Redesign with Sustainability Certifications in Boston's Seaport District.
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Savannah Convention Center
Expanding to meet growing demand for events in a historic, vibrant Southern city.
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Frequently asked questions
Our team of regionalized building scientists, innovative educators, and industry collaborators bring a passion for solving complex problems to your unique challenges. For example, we’re ready to help you with detailing Air barriers an vapor retarders, optimizing your assembly for energy efficiency, understanding sustainable assembly options, designing a vegetative roof, creating a resilient roof system, navigating specialty installations, executing effective wind designs, reviewing specifications and details, and more.
Reference the PDF file to identify and directly connect with the GAF Building and Roofing Science professional serving your region.
Every roofing project starts with WWWWH — why, where, when, what, and how.
Why, where, and when are between you and your client. But the what and how? We’ve got two experienced teams ready and waiting to help.
The What: Design Services
For support with product documentation, specifications, calculations, code compliance and a wide range of system-specific information, the GAF Commercial Design Services Team can get you exactly WHAT you need to move your project along.
Reach out to your dedicated, regional Design Services professionals for:
- Project letters
- Specification and Detail packages
- Construction Document phase support
- Guarantee questions
- Compatibility questions
- Wind calculations
- FM Navigation
- 3rd Party Performance Verification
The How: Building and Roofing Science
When you’re looking for support on HOW to achieve your design objectives — be they wind uplift, R-values, energy efficiency, resiliency and more — connect with our Building and Roofing Science professionals. The team includes building scientists, educators, architects, and construction veterans who specialize in collaborating with other design professionals to solve complex real world design challenges.
Reach out to the regionalized Building and Roofing Science team for insights and discussion about:
- Air barriers & vapor retarders
- Sustainable assembly options
- Resilient roof system design
- Wind design for roofs
- Energy-efficient designs
- Vegetative roofs
- Specialty installations
- Risk mitigation
- Specifications & details
- Continuing education
- And more