Q: A client asked me to install hardwood strip flooring in his carpeted living room. When I removed the carpet, the subflooring underneath was solid, but it was stained with dog urine. Can I just treat the stained areas or put down a layer of 15-lb. felt before installing the new flooring, or do I need to replace the subflooring?

A: Floor finisher Michael Purser, owner of the Rosebud Co., in Atlanta, responds: I once owned a 100-plus-year-old home with very nice pine floors. A previous owner had quartered his dog in a rear hall and, as you can imagine, there were urine stains. Since it was pine, the discoloration to the wood wasn’t too bad, so I just sanded and finished...

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