High R-Value
  • Polyiso has the highest R-value per inch of any rigid foam board insulation.
  • Polyiso is unique in that the R-value increases with the thickness of the foam, so three inches of polyiso has a higher R-value per inch than two inches.

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Continuous Insulation
  • By blocking thermal bridging, a polyiso continuous insulation system increases the overall thermal performance of a wall assembly and a building.
  • A polyiso continuous insulation system keeps energy and heat loss to a minimum, increasing the building’s energy efficiency and leading to lower monthly operating costs.

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Fire Performance
  • Among all foam plastics, polyiso possesses the highest level of inherent fire resistance due to its unique structure of strong isocyanurate chemical bonds.
  • In 3 key fire tests - ASTM E84, NFPA 285 and NFPA 286/UL 1715 - polyiso performs exceptionally well.

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