Split R38 insulation into thinner pieces to get R19 - AVS Forum

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digi-head's Avatar digi-head
11:45 AM Liked: 10
post #1 of 8
01-03-2013 | Posts: 100
Joined: Dec 2004
I know this is going to make me sound cheap, but hey, I AM! Has anyone ever took some extremely thick insulation, like R38 ish (12" thick), and torn it into thinner pieces, like R19 thickness? Menards has some thick insulation on sale, and if I could manage to split it up, it would save me a lot. It seems like it should be fairly easy to tear it, since it is basically layered along that direction anyway. I'm going to be loosely stuffing it in my ceiling for sound absorption.
tlogan6797's Avatar tlogan6797
12:05 PM Liked: 36
post #2 of 8
01-03-2013 | Posts: 4,840
Joined: Feb 2005
That should work, you're just going to need to REALLY cover up as it will get REALLY itchy tearing it instead of cutting it.
aaustin's Avatar aaustin
12:47 PM Liked: 33
post #3 of 8
01-03-2013 | Posts: 1,228
Joined: Dec 2010
I'd also wear a face mask.
digi-head's Avatar digi-head
04:13 PM Liked: 10
post #4 of 8
01-03-2013 | Posts: 100
Joined: Dec 2004
That's good advice. That stuff can be nasty, I know.

Is about R19 thickness what's recommended for sound absorption in ceilings? Or would R11 work just as well?
Brad Horstkotte's Avatar Brad Horstkotte
08:20 PM Liked: 57
post #5 of 8
01-03-2013 | Posts: 5,131
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I did that to split r13 into thinner sheets to use in lining speaker cabinets, it does tear away fairly easily.
digi-head's Avatar digi-head
08:32 PM Liked: 10
post #6 of 8
01-03-2013 | Posts: 100
Joined: Dec 2004
Fantastic, thanks, I was hoping I'd find someone who's actually done it before!
BIGmouthinDC's Avatar BIGmouthinDC
09:59 PM Liked: 786
post #7 of 8
01-03-2013 | Posts: 21,776
Joined: Jan 2003
I've ripped insulation to make it thinner and lived to talk about, but I do have a persistent cough.
digi-head's Avatar digi-head
10:00 AM Liked: 10
post #8 of 8
01-04-2013 | Posts: 100
Joined: Dec 2004
Quote:
Originally Posted by BIGmouthinDC View Post

I've ripped insulation to make it thinner and lived to talk about, but I do have a persistent cough.
Chronic health problems be damned, I'm gonna save a few bucks! Lol
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