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Old 02-24-13, 09:17 AM   #14
Helper EcoRenovator
Join Date: Feb 2009
Location: St. Louis, MO
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I have foam as an outside sheating (looks to be about 3/4-1 inch). I have metal cross bracing instead of plywood. So, right now I have siding-foam sheathing-2x4 wall.

I am planning on putting the new xps just on the inside (butted up against) of the current exterior foam sheathing. Then I want to blow cellulose on the interior side of the xps.

So, if I'm understanding you correctly, I should still be able to do more foam on the outside in the future, correct (because I don't currently have plywood sheathing)??

I guess it seems weird to me to NOT have a vapor barrier on the inside, but you think I'll be ok?
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