• What is Icynene
• The Icynene Process
• Why Icynene?
• Icynene vs. Other Insulation Methods
• Frequently Asked Questions

Does the code allow for an attic sealed with Icynene?

The 2006 edition of the International Residential Code specifically addresses using the unvented/conditioned crawlspace and attic designs.  Sections R408.3-408.7 address unvented crawlspaces, and Section R806.4 deals with the conditioned attic.   An important detail of the unvented attic is addressed in paragraph 2:

"An air-impermeable insulation is applied in direct contact to the underside/interior of the structural roof deck. Air-impermeable shall be defined by ASTM E 283."

Icynene is the only insulation material that meets the air barrier requirement as specified by ASTM E 283, and is therefor the only insulation material that can be applied to the underside of a roof deck and pass code.  This chart compares the ASTM E 283 air permeance of 9 different, commonly available spray foams.

Return to Frequently Asked Questions