I get frost heave in the "floor" of my mom's freezer...... :)
sometimes she forgets to close the door completely & the moisutre
overwhelms the defrost cycle .....the moisture freezes & "mounds" the
aluminum panel that is the "floor" of the freezer
I remove the floor panel & defrost with warm water & shop vac....good
I was actually wrong in my last post - the air temperature here in north
London was about 63 F. Today it was a cold 52 F. Tonight they are
expecting lows of 45 F.
Last year I think the worst we got was some mornings with frozen car
The chance of frost below an 8" slab here is not very high I suspect.
In any event the water table is at about 9' and there is very little
open soil to catch rain in the area.
In any event, many thanks for all the posts and advice given here.
I believe our climates have similar temperatures. Mostly maritime
moderate with an occasional freeze.
Our local building codes call for building foundations to be a minimum of
12" below finished grade. So, there is some potential for frost heave but
not much. Again, a well-drained based will go a long way to preventing
Bob Morrison, PE, SE
R L Morrison Engineering Co
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