24 May 2016
Big, black stains from pet urine is a common problem people encounter when they remove carpet and expose the flooring underneath. Knowing what causes this problem and what you can do about it can help you maintain your hardwood floors and can also help you take care of your home. Why does pet urine stain hardwood flooring black? When an animal, like a cat or a dog, pees on hardwood floor, a chemical reaction takes place between the ammonia in the urine and the tannins in the wood.