FHB Podcast Segment: Is Foam Against Form Boards a Good Idea for a Garage Slab?
The FHB Podcast crew chats about foam against form boards prior to pouring concrete.
Andrew from Wisconsin wrote into the FHB Podcast to ask the best way to form and insulate a turn-down slab. Here’s the full question: “Hi guys, is it dumb to put 2 in. of foam against the form boards before pouring? I like the idea of a 2×4 sideways on top to keep the foam in place and to screed off of.
“I’m going to have 2 in. of foam under the slab with a vapor barrier. Everything is over several inches of compacted three-quarter clear stone. Any thoughts you have on the slab or forms are appreciated.”
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