Used 8" Advantage Block on an ICF walkout basement. R 27 on the 8 ".
Warm in winter but yes, you are required to use the adhesive membrane on the exterior, instead of usual tar seal on Concrete. It is VERY HARD to get an ICF basement to ever leak. Concrete pour with snap tie protrusions always are a source of future leaks, let alone cracks that form over time.
Still by far a better result. Crew is on site once, not twice, and the pour using a concrete pump is very even in the walls. Cross tie the Re Bar vertical and horizontal, and it is a far stronger foundation wall than any straight concrete form pour.
As for getting the money back, most home buyers can't tell the difference between simple preserved wood foundation and an ICF basement, so no, they won't pay more when comparing two houses side by side, but that is not why you do ICF in the first place.
Drewski
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