I tried to ask this question at GBA but couldn't get past the secret log-in code :)
Martin said:
So I assume drywall is an air barrier for a 2nd floor ceiling that has an attic above it. Are you saying loose insulation above the drywall (cellulose or fiberglass) is not air barrier. If spray foam was used instead of cellulose, does it qualify as an air barrier.
What is the relationship between air barriers and insulation, as well as their individual importance.
Martin said:
Allan,
Q. "Is cellulose as good an air barrier as open or closed cell foam?"
A. No. So seal your ceiling before you insulate!
Q. "Is cellulose as good an air barrier as open or closed cell foam?"
A. No. So seal your ceiling before you insulate!
So I assume drywall is an air barrier for a 2nd floor ceiling that has an attic above it. Are you saying loose insulation above the drywall (cellulose or fiberglass) is not air barrier. If spray foam was used instead of cellulose, does it qualify as an air barrier.
What is the relationship between air barriers and insulation, as well as their individual importance.
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