Re: Pet Odor in Subfloor
It would depend on just how bad the odor is. If it's a concrete slab, then you don't really have a choice and will have to seal it with a pigmented shellac.If you've got a wood sub floor, then depending on the severity of the odor, replacement may be necessary, though sealing with shellac will likely deal with all but the most stubborn odors. Regardless of the subfloor type, sealing the walls and ceiling would be recommended.
Before sealing, I would also recommend treating the floor with Urine Off or Nature's Miracle. Both are enzymatic products that are designed to remove odor by breaking down the components that cause the odor.
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