Any Issue With Using 2 Layes Of 1" XPS? - Insulation - DIY Chatroom Home Improvement Forum


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Old 07-22-2013, 12:47 PM   #1
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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.

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Old 07-22-2013, 10:28 PM   #2
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Any Issue with using 2 layes of 1" XPS?


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.

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Old 07-27-2013, 12:19 AM   #3
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Any Issue with using 2 layes of 1" XPS?


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
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Old 07-27-2013, 12:32 AM   #4
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Any Issue with using 2 layes of 1" XPS?


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