Here in the north or northeast I have never really got this straight. What is the acceptable way to finish off the top of exterior (blue foam) insulation on the outside of a foundation? I see guys cutting the exposed foam just below grade, leaving the concrete exposed. It never looks good sticking out and either way the earth water and critters get behind the foam. Also I am not sure wether its recommended verses putting the foundation on the inside. I usually bring it all the way up and cover it with coilstock. Any insight on this would be helpful. Thanks.
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Replies
ovo.... it's the dumbest thing i've ever seen in terms of energy conservation
in RI ,the code was amended to allow cutting the foam off at grade, so there is no insulation in the zone where it is needed most.. from grade to the band joist
from grade down, the foundation is tempered by the earth, so there is less need of insulation in those zones
me, i insulate on the interior of the foundation with borate treated EPS and stud walls
..hey thanks MikeIt seems silly for many reasons and it seems everyone avoids this issue. ( I'm curious what "borate treated EPS" is.)
borate treated EPS....
http://www.r-control.com/performguard.aspMike Smith Rhode Island : Design / Build / Repair / Restore