Above-ground poured concrete interior insulation?
We are planning to finish a portion of our basement. A few of the walls in the planned finished portion will be against the poured cement basement walls. The basement walls are 99+% above grade/ground. The house is a few years old located in the 4A region, close to the 5A region border in PA.
Currently there is insulation on the basement walls. It is fiberglass that is secured with a white wrap which is nailed directly into the cement walls. The white wrap appears to have a diamond pattern on it with tiny little pin holes. Pictures included.
The exterior side of the poured cement basement walls have no insulation or covering on their surface. The exterior walls are completely sheltered from sun and precipitation as there is a "waterproofed" deck which shields them as well as the walls facing due south.
The plan is to frame the walls with 2x4s close to the white wrap and place roxul insulation between the 2x4s for added R value and flanking sound isolation.
I have read many of the studies referenced and comments here, but have not been able to find a definitive answer as to whether the current insulation will be a problem. The walls will be able to dry to the outside since they are fully exposed. Is XPS still the way to go for above ground/grade walls? I do not want to waste all the current insulation and spend money if I do not need to ...
Posted Wed, 03/05/2014 - 20:39
Edited Thu, 03/06/2014 - 05:53
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