Compressing Fiberglass?


Old 03-01-02, 09:02 AM
Visiting Guest
Posts: n/a
Compressing Fiberglass?

I'm insulating an area of new construction with R-30 (10 1/4") fiberglass. In one area, however, (approx. 100s.f.) the ceiling is framed with 2x8's with a plywood attic floor above. I understand that the air spaces within the spun fiberglass is what gives the system it's insulative value and that compressing it decresses it's R-value. But I'm trying to decide whether to go ahead and use the R-30 throughout and compress the 10 1/4" insulation into the 7 1/4" deep cavity, or whether to use R-25 (8 1/4") in that area. Now that I've written all this out, the answer seems pretty obvious, but what do you think?
Sponsored Links
Old 03-05-02, 08:14 AM
Join Date: Oct 2000
Posts: 674
Use the appropriate size.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes