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This article describes common indoor stains caused by animals and pets on floors and walls due to pet urine or simply from a pet frequently lying against or touching a building surface. These photographs also assist in determining when a building has previously housed pets or other animals even if none are currently present. We discuss the cause and cure of various types of pet stains. Readers concerned with pet stains on walls should see Pet Stains on Walls. Also see ANIMAL ODORS IN BUILDINGS for a discussion of the diagnosis and cure of odors due to animals buildings, and see CAT DANDER in BUILDINGS for a discussion of animal allergens indoors and how they are detected and removed. When investigating a building for a mold problem, you can save mold test costs by learning how to recognize Stuff that is Not Mold or is only Harmless Mold but may be mistaken for more serious contamination - save your money. Save your mold test money, and increase the accuracy of your mold contamination inspection or test for toxic or allergenic mold in buildings: review these items to learn recognize non-fungal materials or even possibly harmless cosmetic "black mold" often mistaken for "toxic fungal growth." © Copyright 2009 Daniel Friedman, All Rights Reserved. Information Accuracy & Bias Pledge is at below-left. Use links at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website. How to recognize black stains on indoor walls and trim caused by pets, not moldDog Stains on Building Drywall
Provided the stains are due to simple contact between an animal and a building surface, the cures for dog or cat dirt marks on building walls or trim are simple cleaning or at most, re-painting. Pet Urine on Building Walls or CarpetsWhen a dog, cat, (or in some reported cases humans) has urinated on carpeting we recommend that the carpet and carpet padding be replaced. The flooring or subflooring below the urinated-on carpet needs to be inspected for stains and penetration of urine as well. Killing or Removing Pet Urine Odors? Because urine leaves an odor in wood surfaces that is difficult to remove, once an area has been used as a cat or dog toilet, animals are likely to return to that spot to pee on it again. While special pet deodorizers and cleaners are available to clean and remove pet odors, we find that often the animals will continue to return to the scene of their accident or crime. If the amount of urine was very small, an ounce, one event, covering just a few square inches, it may be possible to clean and seal the subfloor using a lacquer primer/sealer, clear shellac, or another appropriate re-finishing coating. Readers should see ANIMAL ODORS IN BUILDINGS for detailed advice on how to find and remove pet and other animal or humanb odors and smells in buildings. Pet Urine Stains on Building Floors Our photo (left) shows severe urine staining on a hardwood floor of a bedroom outside of a bath. The owner was unaware of the stains until the carpeting was removed. The white colors in the stained area demonstrate the futility of attempting to remove the animal stains by bleach. If stains penetrate only a millimeter of wood it might be possible to sand and re-finish the floor, or to use a combination of sanding, bleaching, and re-staining of the finish floor. But usually we find that the urine stains have penetrated the wood so deeply that flooring replacement is about the only option if the occupants don't want to live with these stains. ... Technical Reviewers & References
Use links just below or at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website. MOLD APPEARANCE - STUFF THAT IS NOT MOLD
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10/14/2009 - 11/17/2005 - InspectAPedia.com/interiors/Pet_Stains.htm - © 2009 - 1988 Copyright Daniel Friedman All Rights Reserved - InspectAPedia® is a Registered U.S. Trademark