Open-Cell Spray Foam in Unvented Attic
I need to insulate my unvented attic and the price for 1″ of r6.4(total) closed cell foam is MORE than 5.5″ of r20 open cell foam.
Can I use open cell foam to insulate an unvented attic?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part