Spray foam advice
We are working on a single-family home in climate zone 5. I am looking at the floor assembly for an “overhanging” floor (above unconditioned space) highlighted in the section below. We are planning to use spray foam insulation. The code minimum is R-30, which is easily achievable because our floor framing is 9.5″ deep. Do you think open or closed cell spray foam is more appropriate for this application?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part