I am planning to build a simple rectangular 1200 sf ICF house, which will eventually be earth sheltered, this spring in the central Wisconsin area.  I prefer a flat wall ICF and have narrowed my choice of manufacturers down to A-One (carried by County Materials) and BuildBlock.  I am really interested in peoples opinions and experiences using either of these forms, and I am particularly interested in which one is would be easiest for a contractor with extensive concrete but no ICF experience to construct.  Thanks.

You may wish to re-post this to the ICF page.

But you don't need to, of those two use BuildBlock, no doubt. A-one is fine but BuildBlock is flip-able (no top, no bottom and better yet nor right or left corners). Bonus BuildBlock has ties every six inches.

But you did not mention price, service or support.

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After reading over the websites, I have to say that I do prefer BuildBlock's structural design over A-One, but have never seen either one used on a project.   As for the other factors, I am still investigating but they seem pretty close.  Price seems to be close enough not to matter too much in the comparison.  After emailing and speaking with their Wisconsin rep, A-One comes across as having excellent service and support and while I missed the BuildBlock guy's call yesterday, they certainly got back to me fast enough that I suspect they do too.  Hmmm...  I'm looking for something that will tip me one way or the other…ease of construction, water tightness, blowout resistance, and any other details I may have missed.