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— The Editors
•Posted by Al:
A foundation contractor told me that he uses a waterproofing additive in the concrete
when pouring a slab-type foundation instead of a vapor barrier. He claims that this is
a better procedure because a vapor barrier doesn't seal around plumbing, gets punctured,
tears, etc. I am interested if anyone has found this to be effective.
•Followup posted by Keith:
I'm not aware of any additive that will "waterproof" concrete. Higher-strength
concrete will become less permeable