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-   -   Any Issue with using 2 layes of 1" XPS? (http://www.diychatroom.com/f103/any-issue-using-2-layes-1-xps-184035/)

ryanmcl 07-22-2013 11:47 AM

Any Issue with using 2 layes of 1" XPS?
 
2" XPS T&G is special order only in my area. Is there any issue to just putting on two layes of the 1" stuff? This is for a basement finish in Chicago.

Fix'n it 07-22-2013 09:28 PM

i don't see a problem with it. as long as its touching well = no air gap.

btw, they have it at the menards in homer glen. the 2" stuff.

Gary in WA 07-26-2013 11:19 PM

Need R-10 XPS if no stud wall with R-13 batts, Zone 5; http://publicecodes.cyberregs.com/ic..._11_sec002.htm

http://www.buildingscience.com/docum...r-requirements
R-5 XPS good only to 33%RH at 68*F room air.m Use more foam/less RH.

Gary

ryanmcl 07-26-2013 11:32 PM

Thanks gary, I'm underway using 2 layers r-5 xps, stud wall and r13 roxul to meet close.


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