Severe Pet Urine in a Rental Bedroom

The UV pattern, swollen baseboard, and 28% pad reading indicate urine has reached the pad and likely the concrete. Urine contains salts, urea, and odor-causing compounds; when it dries, salts can attract moisture, and the pad acts as a reservoir. The gallon of enzyme product was applied without extraction and the room was closed for a week. That created a wet, humid environment that can support microbial growth and make the odor worse. Enzyme products need proper dwell and moisture control, not a flood and a closed door.

A one-hour job cannot address this. Surface extraction may remove some liquid from the carpet face, but the pad and slab remain contaminated. The carpet backing may also be delaminated from prolonged moisture. The correct assessment requires moisture readings, UV mapping, odor evaluation, and inspection of the tack strip and baseboard. The landlord's timeline is a scheduling constraint, not a technical reality. I would explain that the carpet may be salvageable, but the pad and slab treatment are the controlling factors, and that a one-hour clean would only produce a temporary odor mask.

Equipment and chemistry: portable extractor, sub-surface injection-extraction tool, hard-floor tool, moisture meter, UV light, PPE, disposable bags, an appropriate urine treatment or enzyme product used at label dilution, a disinfectant compatible with the surface, and an odor counteractant if needed. Ozone only as a final air treatment in an unoccupied space, never as a substitute for source removal.

Sequence:

1. Document and photograph; map contamination with UV and moisture readings.
2. Remove furniture and protect adjacent areas. Wear gloves, eye protection, and respiratory protection as required.
3. Pull back the carpet if possible; remove and bag the contaminated pad. Pad is usually not cleanable in this condition.
4. Treat the concrete with an appropriate cleaner and disinfectant, then extract or wet-vacuum; allow to dry. If odor remains after cleaning, a sealing product may be needed, following label directions.
5. Clean the carpet backing and face with a urine-appropriate product, using sub-surface injection-extraction where accessible. Avoid overwetting.
6. Install new pad, reinstall carpet if serviceable, and dry with air movers and dehumidification.
7. Verify moisture and odor before considering ozone. Ozone requires the space to be empty of people and pets, with proper warning and ventilation afterward.

Safety and source removal come before deodorization.

I would tell the landlord that pad replacement is not optional in this condition. The pad is the reservoir, and cleaning it in place will not reliably remove the contamination. The carpet may be salvageable if the backing is intact and not delaminated, but it must be evaluated after the pad is removed. If the backing is degraded or the odor has penetrated the carpet backing, replacement is the more honest recommendation.

I would also explain that odor verification is not a one-hour test. After cleaning and drying, the room should be checked with a moisture meter and by smell under normal conditions, not immediately after a masking product. The landlord should not rely on ozone to cover a remaining source. I would provide a written scope that separates pad removal, slab treatment, carpet cleaning, and odor verification, with a clear statement that complete odor removal cannot be guaranteed if contamination has penetrated the concrete. If the landlord refuses pad removal and insists on a one-hour surface clean, I would decline that scope or perform only a documented limited service with no odor guarantee.