I am a newbie at ICFs. I did some research in the early 2000's and found most ICFs use foam panels with plastic spacers to build the wall filled with concrete. There was one product that made large cement blocks using Styrofoam beads dipped in concrete to make a block that was already fairly sturdy. After assembly you could cut chases for electrical with a chain saw. This appeared to be a better system. I think it was called Gridwall. I can't find any similar products by searching. Does anyone know if they still exist? They either made or had a distribution center around Denver as we actually saw the product. Are there any others that use this method?

Not foam but shredded wood in cement which makes it inert and sturdy.

Durisol or now called Nexcem
https://nexcembuild.com/?gclid=EAIaIQobChMI6IWdxOmu5gIVGh-tBh0VHwAZEAAYASAAEgKqqvD_BwE

You mean composite ICFs. Like in this article
https://www.icfmag.com/2019/01/alternate-stay-in-place-forming-systems/

Shipping is a killer on those types of blocks. Also below-grade you probably want the strength of a solid concrete\ICF wall.

Stax Blox is a redesigned Polyurethane ICF, we just achieved a Class 1 fire rating with a 5' per hour burn rate. Polyurethane is a little more than an R 7 per inch and our BloX are 2.5" thick per form panel, making it a total of 5" of insulation resulting in over R 35 insulation resistance.

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