Spray Foam
- $6/cf, need 3" for R18 - [1]
- CEB + 4" gap double wall - or surface spray - with mounts for siding sticking out 4"
- Cu ft makes 4 sf, so this comes out to $1.5/sf for R18.
- This page was last edited on 3 September 2023, at 00:31.
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