How do I stop efflorescence in my basement concrete floors?

Expert Answer:
There is no way to completely stop it. The efflorescence tells me that water has now migrated past the perimeter drainage tiles and is under the concrete slab. To reduce (not necessarily avoid) it, you might excavate and treat the basement walls and at the same time up-grade the drainage tiles. That will do part of it but as long as water keeps getting in under there, the efflorescence will continue. These are just various salts that are in the concrete and are getting washed to the surface as water wicks them up.
Answered By:

Renovation Expert

Ren Molnar -
294 Columbus Ave, Ottawa, Ontario, K1K 1P4
Contact: (613) 748-3003 ASK

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