Slab on slab
I’m considering the construction of a 6-8″concrete slab on an existing 4″ concrete slab. Because the existing slab would be somewhat larger than the new (3′ at most), could water infiltrate in between the two slabs and cause issues when it freezes?
I’m in Ontario, Canada.
The old slab is in good condition, 4″ thick, has a poly VB under it and is too big for the small crappy outbuilding on it.
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