Insulation
The GAF line of EnergyGuard™ Polyiso Insulation and EnergyGuard™ NH (Non-Halogenated) Polyiso Insulation products provides high thermal value, cost-effective solutions that can meet energy code and building specification needs while helping to protect your investment.
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EnergyGuard™ NH Polyiso Insulation
Learn why to choose EnergyGuard NH Polyiso from the experts at GAF. Explore our full line of TCPP-free polyisocyanurate materials.
Product Catalog
GAF offers the range of durable, easy-to-use products and services you need to succeed.
Why choose GAF EnergyGuard™ Polyiso Roof Insulation?
Easy to work with
Lightweight, easy to cut, and easy to maneuver
Higher R-value
Higher R-value per inch compared to non-polyiso types of insulation of equivalent thickness
Compatible with many systems
Compatible with most roofing systems including single-ply, BUR, and modified bitumen
Non-Halogenated option
Every GAF polyiso product includes a Non-Halogenated option at our standard polyiso pricing.
GAF Tapered Design Group Is Here To Help | GAF Roofing
GAF's Tapered Design Group offers a multitude of services to contractors, distributors, architects and building owners. We will work with you to select the right strategy for your project utilizing design, material selection, inventory management, budget and r value to best meet your needs.
Learn more about polyiso insulation on the RoofViews blog
TCPP-Free Insulation Without the Premium Price
Commercial Roofing
Transitioning to TCPP-free insulation allows contractors to meet evolving environmental standards without sacrificing performance or increasing costs. By offering a halogen-free polyiso option at a standard price point, GAF helps builders prioritize safety and sustainability. This shift ensures compliance with "green" building certifications while maintaining the high thermal efficiency required for modern commercial roofs.
March 17, 2025
Picking the Best ISO Roof Insulation for Your Commercial Roofing Project
Commercial Roofing
Selecting the ideal polyiso insulation requires balancing thermal performance, fire resistance, and compatibility with your roofing membrane. From standard flat boards to tapered systems for improved drainage, choosing the right ISO product is essential for energy efficiency and long-term durability. Evaluating these factors ensures your insulation strategy meets both budget and building code requirements.
March 31, 2021
Roof Insulation: A Positive Investment to Reduce Total Carbon
Building Science
Optimizing roof insulation is a powerful strategy for reducing a building's total carbon footprint by lowering operational energy demand. While the manufacturing of insulation involves embodied carbon, the long-term energy savings significantly outweigh the initial impact. Investing in high-performance thermal barriers helps owners achieve sustainability goals while ensuring long-term financial and environmental returns.
September 18, 2024
How to Install Insulation with 3 Inch Fill
Commercial Roofing
Installing insulation with a 3-inch fill requires specific techniques to ensure a level surface and optimal thermal performance. By following a systematic approach to staggering joints and securing the boards, contractors can prevent thermal bridging and air gaps. Mastering this process is essential for achieving the flat, stable substrate necessary for a high-quality, long-lasting commercial roofing system.
June 29, 2020
Frequently asked questions
Polyisocyanurate (Polyiso) is a thermoset plastic which, when produced as a foam and used as rigid thermal insulation, offers a higher R-value (approx. 5.5-6.5) per inch compared to non-polyiso types of insulation of equivalent thickness. Polyiso is one of the most commonly used and specified forms of commercial roof insulation also offering superior fire and moisture resistance.
TCPP-Free/Red List Free NH polyiso does not contain potentially hazardous flame retardant chemicals. TCPP-Free/Red List Free EnergyGuard™ NH Polyiso Insulation maintains the same R-value when tested according to ASTM C1289 standard using the C518 test method at both a mean temperature of 40°F (4.4°C) and 75°F (24°C) and is better for the environment as it contains no potentially hazardous flame-retardant chemicals. In a first for the industry, the full line of EnergyGuard™ NH TCPP-Free/Red List Free polyiso products is available at standard EnergyGuard™ polyiso pricing. The full EnergyGuard NH product line of products qualifies for a variety of green certifications.
The GAF Tapered Design team will provide you with a takeoff, consisting of tapered polyiso panels and fill panels that work together to provide slope on a flat roof. These panels help provide positive drainage to move water efficiently off the roof. Since so many commercial roofs are essentially flat, standing water can become a serious problem by promoting vegetation growth, seam separation, and freezing damage, as well as simply adding unnecessary and potentially harmful weight to the roof structure. An effective tapered design, according to the 2018 International Building Code, should “ensure drainage of the roof within 48 hours of precipitation.”
GAF EnergyGuard™ insulation products can contribute towards meeting criteria for several of the most popular green building rating systems (LEED, WELL, Living Building Challenge among others) and GAF can provide third-party product-specific documentation such as Environmental Product Declarations (EPDs), GREENGUARD Gold certifications, Recycled Content Certifications, Health Product Declarations (HPDs), and Declare labels to meet disclosure requirements.
GAF offers third-party verified recycled content of its GRF facers. Values range from 13% – 41% depending upon thickness. See GreenCircle Certification certificates by thickness of polyiso on gaf.com. GAF has achieved GreenCircle Certified Recycled Content Certifications for flat and tapered EnergyGuard™ Polyiso Insulation and EnergyGuard™ NH Polyiso Insulation.
Available Sustainability Documents include:
- Product-specific Environmental Product Declarations (EPDs)
- Health Product Declarations (HPDs)
- Declare labels
- GREENGUARD Gold Certifications
- GreenCircle Recycled Content Certifications
- GreenCircle’s Life Cycle Assessment (LCA) Optimized certification