Energy Modeling Agency’s Claims About Spray Foam R-Value and Code
There is a company posting their service on what is supposed to be a group for professional insulators for providing insulation code approval documentation for new construction with spray foam R13 walls, and R20 attics. The guy who runs the company told me he’d recommend “another inch” when I told him I’m climate zone 6/7 with 9000 HDD.
The website is : energymodelingagency.com
Basically the company provides performance based documentation over prescriptive and uses mainly claimed infiltration reduction as a means of achieving this.
What I’m surprised with was the amount of trade guys that commented in support of this, and how 10 years after this was covered here at Green Building Advisor after Icynene came out with this lower R value for spray foam idea, it is still being used in marketing.
This really just seems like exploiting a code loophole, however I’m not in the foam industry, so am I missing something?
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