Why the smell comes back after shampooing
Urine rarely stays on the carpet fibers. It soaks into the pad, spreads across the backing, and can reach the subfloor, tack strip and the bottom edge of drywall or baseboards. Surface shampooing can even reactivate dried urine by adding moisture, which is why some rooms smell worse after a cleaning.
In homes with several animals or a long history of accidents, the affected area is often larger than the visible stains suggest. Humid Middle Tennessee summers tend to make old urine odor more noticeable.
Finding every affected spot
We use ultraviolet lights and moisture meters to trace urine deposits that are not visible in normal light, then mark the areas on the floor. This helps us remove only what is necessary and avoid leaving a hidden spot behind. We also check corners, the base of walls and areas behind furniture, where animals often return. Marking the spots before anything is pulled up also gives you a clear picture of the scope before you decide on flooring.
Removal and treatment
- Pull back and remove Saturated carpet sections and pad are removed and bagged. In heavily affected rooms, full replacement may be the realistic option.
- Address the subfloor Wood that absorbed urine is cleaned and treated. Sections that are badly damaged are cut out so your contractor can replace them.
- Work the wall line Baseboards and the lower edge of drywall are cleaned, or removed where urine wicked into them.
- Seal Treated subfloor and concrete are coated with an odor-blocking sealer before new flooring is installed.
- Deodorize and review If odor lingers, deodorization equipment may be used, and we walk the space with you to talk through the result.
Floor types and materials
Stained hardwood may need sanding and refinishing by a flooring professional after we treat it.
- Wall-to-wall carpet and pad
- Hardwood, where urine can stain and penetrate between boards
- Laminate and vinyl plank, which can trap urine in seams and underlayment
- Concrete slabs in basements and garages
- Upholstered sofas, pet beds and mattresses
Health and household safety
Heavy urine buildup can create strong ammonia odors and unsanitary conditions. Our team wears protective equipment and uses EPA-registered products per label on areas with animal waste. If feces are also present, we clean those before deodorizing.
When ozone is used as a finishing step, people, pets and plants must be out of the home, and we ventilate before you return. EPA notes ozone may mask odors but there is little scientific support for claims it removes them, which is why removal does most of the work.
Before we arrive, and when others are involved
Please avoid steam cleaning or soaking the area, since extra moisture can push urine deeper. Hold off on installing new flooring until the subfloor has been treated and sealed, or the odor may return under it. If the animals are still in the home, plan for them to stay elsewhere during treatment, and consider talking with your veterinarian if a pet has started having accidents it did not have before.
Replacing subfloor, flooring or drywall is work for a contractor or flooring installer. When a home has many animals and serious sanitation concerns, our animal hoarding cleanup team can help, and animal welfare organizations may need to be involved. For feces and other animal waste, see pet waste cleanup. We serve single-family homes, homes being prepared for sale, rentals and businesses throughout Middle Tennessee.