Polyboard Activation Code

Don't cut'n'cobble- securing it to the bottom of the joists. The gap to the subfloor doesn't really matter, but if you wanted to, installing fiber insulation in there it would improve the overall performance. In US climate zone 5 and higher the 4" of polyiso alone would quite hit code minimum even on a U-factor basis.

2. In your climate zone -- Zone 3 -- most codes call for floor insulation to have a minimum R-value of R-38. Four inches of polyiso has an R-value of about R-16 -- less than minimum code requirements.

Polyboard Activation Code

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Ron joined SGH in 2002 with more than thirty years of experience in civil and structural engineering; building design, investigation, and code development; and research. He is an internationally recognized expert in earthquake-resistant design and structural performance evaluation and is widely recognized in the structural engineering community for his leadership in performance-based design. 75035a25d1