Hi Folks,

Thanks for the help with answering the question's I've had so far.  - I'm also wondering if 6" sounds a little thin for an ICF Nudura foundation... ?  When reading forums, most people say 8" re-inforced is ideal...

My house is a 1,300sqf bungalow and has 6" foundation and 6" walls with a regular roof.  - Should I be worried about premature foundation problems, cave-ins, or other problems associated with how thin the foundation is?

I'm assuming it meets the building codes here (I'm in Ontario, Canada), but still doesn't give me the warm and fuzzy.

Thanks,
Patrick

Patrick the thickness that you have for the wall is fine the real issue is the footing its self, I will suggest that you consider a footing width of at least 20" wide and 10" thick with 3 runs of sch 40 #4 bar for reinforcing the bar should be 3" from the bottom of the footing, we also run two bars at 3" down from the top so that we have structural reinforcing both ways, that is what gives us our warm and fuzzy here in MN where the soil comps should be about the same.

Pat.
The strength of the wall is determined more by the rebar size and spacing than the thickness of the concrete. Concrete is very good in compression and not very good in bending so the Engineers use concrete to support direct loads and to pass the bending and twisting forces to the steel which is very good at handling them.
This is somewhat of a simplification of course.
The advice on the footer is good stuff.
If you want warm and fuzzy, pay an Engineer to do the design and never worry about it again. The peace of mind will be remembered long after the expense is forgotten.
Regards,
Joe

Patrick, the 6" basement walls should be fine unless you have extremely long walls, which would be unusual in a 1300 sq. ft. bungalow. Your soil conditions in Ont. are similar to ours here in Michigan and we have sold/done over 1000 of 6" design.

Patrick:
What is your proposed backfill height?
Kevin