Insulating an interior bathroom


Old 06-20-17, 12:56 PM
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Join Date: May 2017
Location: usa
Posts: 46
Insulating an interior bathroom

Hello all,
I'm considering unfaced fiberglass rolled insulation in interior bathroom walls just to cut down noise in adjacent rooms.

Any drawbacks to doing this? I know the reduction in sound isn't going to be anything great like using this [ATTACH=CONFIG]82206[/ATTACH] but it seems like a cheap attempt is worth a shot.
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Old 06-20-17, 02:03 PM
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Fiberglass offers very little sound reduction. Look into Roxul Safe n Sound.
Old 06-21-17, 01:32 AM
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Join Date: Sep 2016
Location: USA MI
Posts: 2,533
3 1/2 fiberglass insulation will do nothing, if you have a 6" wall there will be some benefit.

Couple years ago when I finished the basement I installed 3 1/2" and 6" of the recycled cotton insulation and it worked great for sound.
Old 06-21-17, 03:50 AM
Join Date: Oct 2008
Location: New England
Posts: 9,994
Sealing penetrations and gaps like electrical boxes and drywall to framing will help with sound transmission. Ditto on the suggested Roxul.

Old 06-21-17, 07:32 AM
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Join Date: May 2017
Location: usa
Posts: 46
Great advice, I'll use the Roxul product in the walls and try a sound deadening caulk around boxes and between drywall/durock and studs.

Thanks everyone.

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