One more quick basement remodel question. What are everyone’s opinions concerning insulating a masonry block wall? I was all set to use standard fiberglass batting between the framed wall and concrete block. However, a friend mentioned the idea of securing a couple of layers of foam board insulation instead.
The basement is dry, but I am a little concerned about how foam board might give water vapor a smooth surface to condense on. Is this a legitimate concern? was planning on a vaporer barrio on the framing before the drywall goes on.
Any obvious advantages or disadvantages to either insulation technique?
Thanks
Replies
This has been discussed here many times.
I doubt that you will find anyone that recommends FG and/or a plastic vapor barrier.
http://www.buildingscience.com/resources/foundations/default.htm
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A-holes. Hey every group has to have one. And I have been elected to be the one. I should make that my tagline.
closed cell foam.
Your concerns are invalid. condenmsation does not care whether it has a smooth surface or an irregular one. It just needs a cool surface.
Foam is a good enough insulation to disallow that.
Conversely, batts hold dust and moisture and grow mold once the condensation occours.
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I will have 2 - 4 inches of space between the framed wall and the cement block. Would you attach insulation board to the cement block with adhesive, or concrete screws (or both)?
Have you already framed this wall?I prefer to glue the foam ( usePL300) to the wal, then shoot or tapcon strapping ( furring) directly over the foam with fasteners long enough to reach through the foam. This is likely to give you rooms that are about 4-6" bigger than a fully framed wall.
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