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1. 
   nbco | Jun 18, 2022 07:36pm | #1

   We just poured a 24x20 addition onto a house using the Lightform ICF's. Pretty simple and basic to use. We just maybe went overboard with the bracing but everything came out within the eighth of an inch all the way around the perimeter. I also have a tendency to add outside corner backup bracing to the excavation walls just out of sheer paranoia from having Symon's forms give out on a commercial job. So it's kind of a stigma in my head. Don't want to ever be a part of that again. :-) it ends up being a panicked shit show. We used a 20 m boom and the mix was 6-in slump and used a 8-ft and then a 4-ft Milwaukee battery powered vibrator judiciously around the foundation as we poured it in two lifts. We've used Fox Blocks in the past and I really didn't notice much of a difference as far as a comparison. I think the only thing I forgot about was maybe the 4-in screws that were helpful for screwing through plywood then the form into your window and door buckings. I'm not sure what codes you're going by but if you want to extend the top plate over because of the one side of the wall being 2 3/4 of an inch thick foam you may need to double up your plate to achieve a one and a half inch extension over the ICF. Which if you're building inspector is sharp about the minimum 7-in embedment that would leave you with wanting at least a 12-in anchor bolt just so you have the projection through it to get your washer and nut on easily. Also don't forget to add your peep holes in the bottom of your window and door bucks to vibrate and to see that you're up to elevation.