time for a new XPS question
I used 1.5" XPS around the perimeter of the first area of my basement. I did this mostly for fear of water somehow getting in and as a mold protectant. In some areas I framed against the XPS with R11 insulation.
In the fall I will move to the 'easy' to finish portion of my basement. I say 'easy' because it entails framing out 3 exterior walls. The area is 14 X 20. The 14' wall is exposed to the side of the home, potentially water could get in here though it never has. I'll use the 1.5" XPS again. The first of the 20' walls abuts the inside wall of the garage. I can not imagine water getting in here...it has no exposure to water from above. Likewise the second 20' wall abuts our sun room so it also has no exposure to water from above either.
I'd like to put some XPS on the walls to help permiate any incidental mositure that may come thru the wall. I am doing this prevent the possibily of mold. I'll frame against this XPS and add R11 fg. Can I get away with 1/2" XPS here in Eastern PA? It has the advantage of coming in 4' wide sheets and is substantially cheaper and $$$ are running low!