I'm by no means an expert, but the thing with concrete is that it's a liquid when you pour it so you you have to build a form for it to hold the shape you want while it cures.
Rather than expensive, metal forms painstakingly arranged and then disassembled, foam is dirt cheap and they're manufactured to fit together modularly like legos. So you essentially build a house out of foam legos and then fill the hollow parts with concrete. There's no need to remove the foam.
I think they just out drywall right over the foam, probably after some moisture proofing layer to prevent condensation.
I spent a few days researching it a few years ago, so that's about all I know and I could even be mistaken lol
Icf makes plumbing and wiring easy as well.foam is not only an insulator but a fire retardant to a degree. There is no need to run conduit or drill holes through studs. Just use a hot knife to cut a channel in the foam, lay in your pipe or wire and sheet it.
Thank you kindly. Watching videos now.
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