Basement Wall Insulation


Old 02-09-03, 05:58 AM
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Basement Wall Insulation

I just finished putting up non-pressure treated 2x2 furring strips along the foundation walls (pressure treated floor plate used) in my basement and am about to install some insulation.

I bought a bunch of rigid 1 1/2" Polystyrene (R-7.5). I'm planning on using an adhesive like liquid nail to secure the foam to the foundation walls and then attaching 1/2" green board.

First question - Do I really need green board for the basement? It's always been a very dry basement.

Last question - Should I install a vapor barrier before the green board?
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Old 02-09-03, 09:13 AM
Join Date: Nov 2001
Location: USA
Posts: 1,873

This is a message on my message board concerning insulating basement walls. If you read it and have any more questions, I'll be more than happy to answer them.
Old 02-09-03, 03:27 PM
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You can still get mold with foam. If you use a 4 mill radiant barrier(RB) material dividing the airspace you will get more insulation value and no mold.

Mold can be a problem on drywall even in a dry basement. On my jobs I install a plastic "J" channel to the bottom edge and keep the drywall about 1/4" off the floor. The plastic "J" will also keep the drywall from contacting the bottom plate.

Thank you for considering my opinion.

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