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Ontheroad · M
Is it a slab foundation? If urien sat on the slab (seeped down through carpets and padding), then it's likely in the concrete - about the only way to deal with it is to use a commercial grade enzyme cleaner on the slab, let dry, seal it and replace the carpet.
Ontheroad · M
@RebelFox Then wood or mdf/osb flooring? Same, or actually worse than a concrete slab. I ran assisted care and retirement communities for years and this was a common problem in those we had carpet in. The fix is the same, just takes more (two applications) of the enzyme solution and a longer wait period with wood flooring.