We are considering doing our next foundation using one of the foam block wallform products. Here, where temps might get to -45F in winter, we have been building using 8″ poured concrete walls, then doing 2″ of foam insulation outside the walls before backfill, finishing exposed foam with synthetic stucco up to the wood house finish at the bandjoists. We’ve been offsetting our concrete walls in 2″ so the foam comes out flush to the framing line. Can anyone recommend foam block wallform products they have had good luck with in foundation applications? Can we finish over the exposed wall with the same stucco technique?
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There was a similar thread a few weeks ago. Here is the link.
The house we are working on now (ARXX block) is getting Dryvit everywhere on the exterior. They just rough up the surface, brown it and throw on some mesh. When dry they slap on the color coat.
Mark
Yes, I am serious. And don't call me Shirley.
I went to the previous thread and read the posts. I have also spent quite a bit of time at some of the many ICF sites. I still have some questions:
1. How will my costs compare doing a foundation using ICFs versus paying my foundation sub to form and pour me one?
2. How difficult is it to keep the walls plumb, true, and the tops straight?
Gene,
Sorry, but I can't help you much with the cost comparison. I think they cost more than a poured foundation. However, I imagine that if you have trouble with your current foundation sub (behind schedule, out of square, etc.), you may make up the extra cost in better control of the job if you have your carpenters do the ICF work.
As long as you start straight and level, stacking the wall straight and level is not too much of a problem. If you use some sort of manufactured bracing system with a turnbuckle built in, you can keep the walls straight and plumb during the pour. The only problem we had keeping walls plumb was a tall wall with a bunch of openings. With the proper braces, 8 or 9 foot walls of a basement shouldn't give you too much trouble.
Hope this helps.
MarkYes, I am serious. And don't call me Shirley.