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Old 10-28-2009, 01:56 AM   #1
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crawl space insulation & faced batts

I am wondering if anyone knows if it is ok to use faced-batts of insulation in the crawl space with the facing towards the masonry wall?

Thank you


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Old 10-28-2009, 05:37 AM   #2
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In cooler climates, face always goes towards the heated side. But for basement, crawl space walls I would use rigid foam insulation.


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Old 10-28-2009, 05:39 AM   #3
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no. The vapor retarder (paper facing) must be placed on the warm side. It is still colder outside this wall. However this type of insulation placed on the masonry wall is a very bad idea anyway since moisture travels in both directions. And you really do not need insulation on that wall. Insulate with spray foam along the rim joist filling every bay to get a more effective barrier.
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Old 10-28-2009, 06:50 AM   #4
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Rather than insulate the walls I would insulate between the floor joists with the vapor barrier against the heated space, leave the walls alone just do the floor. Make sure you tighten up the leaks around the rim joist. And make sure you have adequate cross ventilation just like your attic.
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