Quote:
Originally Posted by workaholic
I am moving my mother in law out of her old house ..... and into her detached concrete block garage.
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Will the garage become a permanent livingspace for her or is it temporary wile the old house is being renovated?
Trying to answer your question: A quick google makes me believe that fiberglass is around 99% air (by volume) , so if you squeeze it into 3/4th the space (6" instead of 8") it is still 98% air.
You say that new 6" fiberglass is R19, so I dare say the reused 8" stuffed into the 6" would be R18 or R19, but not 3/4th of R19 (R14).