So do you, or anyone else, know what this stuff is made of? I tried
asking all kinds of people what it is and about 95% of them didn't
know what I was talking about. Those who did only saw it once, maybe
twice, and didn't know what exactly it is made of either. I'm pretty
confident it is the form the concrete was poured into and also doubles
as insulation. I know it isn't asphalt board as mentioned earlier, and
it definately isn't foam used in newer ICFs.