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About Polyiso

Polyiso Insulation


Polyiso is a closed-cell, rigid foam board insulation used in roof and wall assemblies within commercial and residential buildings of all types. Because of its high thermal performance, it is the product of choice for energy-aware architects, specifiers, builders, building owners, contractors and consumers.


As one of North America’s most widely used, most readily available and most cost-effective insulation products, Polyiso has been cited by the U.S. Environmental Protection Agency for its responsible impact on the environment.  


Whether for roof or wall, polyiso offers:

  • A high R-value per inch compared to other insulation products used in commercial and residential construction

  • An exclusive third-party thermal performance certification

  • Outstanding installed cost advantages and economical cost per R-value

  • The ability to achieve today’s code required R-values while minimizing space, material and labor requirements without breaking the bank

  • Excellent performance in fire tests

  • Ease of use and peace of mind, as Polyiso products are designed for use in an expansive assortment of tested, approved, and code-compliant application.

  • Polyiso is stable over a large temperature range (-100°F to +250°F) and can be used as a component in roof systems utilizing hot asphalt.

  • Polyiso has low density, good adhesion to facers, low water absorption and low vapor transmission

  • Polyiso is not affected by oil-based waterproofing compounds, insecticides or fertilizers when properly protected


To learn more about applications click on the links below:

Roof Insulation

Commercial Polyiso Wall Insulation

Residential Polyiso Wall Insulation 


To learn more about specific polyiso attributes click on the links below:


QualityMarkcm  Certification Program 

Fire Performance 

Compressive Strength 

Environmentally Responsible 

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