America's strongest insulative underlayment— a three-layer composite engineered to reflect 96% of radiant heat and stay on the job for decades, not seasons.
Product Warranty
ASTM E84 Fire Rating
Maximum R-Value Rating
Radiant Heat Reflected
Strongest reflective insulation on the market
Reflects 96% of radiant heat
Industry-leading UV-resistant coating
Holds staples like crazy
Highly resistant to birds and pests
Class A fire rating — ASTM E84
Reduces condensation · Vapor barrier
R-value up to 12*
*R-Value based on combined radiant and thermal resistance function and depends on assembly.
Each layer of Therma-Guard is engineered for a specific role — reflection, insulation, and tear-resistance — bonded into a single durable sheet that installs with standard staples.
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Every roll includes a 2″ overlap tab for continuous thermal coverage. Bulk pricing available for dealers and OEM accounts.
Standard roll size
Residential & pole barn roll
Class A Fire Rating · Flame Spread Index < 25
Reflective Insulation Manufacturers Association
Verified RIMA member standard
Water vapor transmission — qualified vapor barrier
