Yet, I'm afraid that cat urine has penetrate through the capet and underlay to the floor board. AFAIK, the owner has been living in this house for the last ten years, probably having the cat(s) with him the same amount of time. And apparantly, he's pretty messy that I suspect he didn't even attemp to clean up the areas where the cat urinated on.
So is it possible to get this house odor free again with new carpet? Thanks.