the secret to ALL insulation is the entrapment of air -- then having small pockets of air to prevent transfer by convection
if you crush the fiberglass bats, you change the R value!
Silly me, I always thought air (or gas or liquid) facilitated the convection process. I never knew air prevented or slowed the convection process. I always thought air only slowed or prevented the conduction process.
Originally Posted by cem-bsee
what do you think the word 'ALL' includes | excludes???
Home Depot lumber is absolute crap. But the Lowes lumber that we get around here is amazing good. (Pittsburgh) I framed my whole house and maybe threw away 2 2x6's. The floor joists were awesome. Dead on straight and no bows.