Most foam board for the outside permiter of slabs is extruded polystyrene. I do, however, have a bunch of expanded polystyrene board from a previouse job. The manufactures say it works fine, and I don't see anywhere that is prohibited? Comments? Yes, I've emailed my code man but it could take days before he responds.
Footing insulation question
May 23, 2010
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Information here may be outdated?
I used it on a commercial building back in 1974. Still doing fine so far as anyone can tell without digging it up.
Joe.
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