How to get dog pee smell out of hardwood floors (stain and smell)

How to remove dog urine from wood

1. 1

   Soak up the puddle right away

   Lay a thick layer of paper towels or an old towel over the puddle and press down, then replace it until almost nothing comes up. Blot; don't wipe it across the floor.

   Why: Dog accidents are often a large puddle that spreads to the seams between boards. Wiping pushes urine into more seams, and every minute it sits, more soaks in.

2. 2

   Find every spot, including old ones

   In a dark room, scan the floor with a black light, paying attention to areas near doors, around the dog's bed and under area rugs. Mark each glowing spot with tape.

   Why: Dried urine glows under UV light, though other substances can too. Dogs return to spots that still smell of urine to them, so missed spots mean repeat accidents.

3. 3

   Wipe with a finish-safe cleaner

   Clean each spot with a wood floor cleaner suited to your finish on a well-wrung cloth, then dry it. Don't use ammonia or vinegar cleaners.

   Why: This removes surface residue so the enzymes can reach the urine. Ammonia and vinegar don't remove the smell for the dog and can invite it back.

4. 4

   Apply an enzyme cleaner to the spot and seams

   After a test on a hidden area of the same floor, apply the enzyme cleaner to each spot and along the board seams around it. Use enough to reach the urine for the label's contact time, without leaving a standing puddle. Keep the dog off the area.

   Why: Enzymes break down the urea, uric acid and organic matter that bacteria turn into odor. The seams are where puddles soak in.

5. 5

   Blot and dry with airflow

   When the contact time is over, blot any remaining liquid and let a fan blow across the area until it's fully dry. Some smell can linger until it's completely dry.

   Why: Standing liquid swells and damages wood. Fast drying protects the boards and the finish.

6. 6

   Recheck and decide on refinishing

   Once dry, smell the spot up close and check it in daylight. If the odor is still there and the finish looks intact, repeat the enzyme step. If the finish or wood is darkened, discolored or cloudy, plan to refinish or replace those boards.

   Why: Urine that has discolored the finish has chemically affected it, and enzymes can't reverse that.

Why dog pee smells worse over time

Fresh urine from a healthy dog has only a mild smell. The strong smell develops after it leaves the body, as bacteria break down urea into ammonia. Urine also carries uric acid and salts that dissolve poorly in water, so once it dries into wood, the residue stays. When it gets damp again, for example on humid days, the smell can come back.

Masking sprays leave that residue in place, and what smells clean to you may not smell clean to your dog. That's why the method relies on an enzyme cleaner. The general guide is on dog urine stains, and household pet odor is covered in pet smells in the house.

What hardwood floors can take

A sealed floor with an intact finish keeps most urine on the surface, so fast cleanup usually works. The weak points are the seams between boards, worn traffic areas and any bare wood, where urine soaks in. Wood floor guidance warns against wet mops and steam mops, because water and steam damage the finish and the wood.

There's a tension in the sources. Pet-odor guides say to soak the area with enzyme cleaner and let it air-dry; wood care guides say never to let liquid stand on wood. The middle path is enough cleaner to reach the urine, for the label's contact time, then blotting and fan drying. If the varnish is discolored, humane societies say the finish needs to be stripped and redone, or the boards replaced.

By situation

Fresh puppy accident

Soak it up immediately, clean, apply an enzyme cleaner and dry. Caught quickly on a good finish, it usually leaves no smell or mark.

Old dog urine smell in hardwood floors

Find the spots with a black light. If the finish over them is intact, repeat enzyme treatments with full drying between them. Spots where the urine has discolored the finish or wood need sanding and refinishing, or replacement boards.

Urine under an area rug

A rug and rug pad can hold urine against the wood long after the accident. Lift the rug and pad, treat the floor underneath, and clean the rug separately. Let the floor dry completely before putting the rug back.

Dog marking the same spot

Make sure every trace is gone, then block access until the dog is retrained. Marking decreases after neutering. Don't punish the dog; retraining works better.

Older dog with repeated accidents

A sudden change in a house-trained dog's habits warrants a vet visit and urinalysis, and dogs that leak urine while sleeping may be incontinent.

Unfinished or worn wood

Bare wood absorbs urine deeply. Expect several enzyme treatments, and if the smell persists, sanding and resealing or replacing the wood.

What not to do

• Don't wipe the puddle across the floor. It spreads urine into more seams. Blot and absorb instead.
• Don't use ammonia or vinegar cleaners. They don't remove the urine smell for the dog and can encourage repeat accidents.
• Don't steam-clean or wet-mop the floor. Steam and standing water damage wood and its finish, and heat can set urine odor.
• Don't mix bleach with ammonia or vinegar. Bleach plus ammonia makes chloramine gas; bleach plus an acid makes chlorine gas.

Other methods that work

Oxidizing pet cleaner

If you've already used other cleaners on the spot, humane-society guidance says to clean again with an oxidizing pet cleaner first, then apply the enzyme cleaner, because residue from other products weakens enzymes.

Caution: Test it on the wood, rinse between products, and never mix them.

Baking soda

Often sprinkled on a spot to absorb moisture and odor. It's traditional advice with weak evidence for urine, and it doesn't break down the residue.

Caution: Sweep or vacuum it up fully, and don't leave it on a wet floor.

Refinishing or replacing boards

When urine has discolored the finish or soaked into the wood, a flooring professional can sand and refinish the area or replace the affected boards.

Caution: Treat and dry the subfloor if the smell came from below before new boards go in.

Stain still there?

The smell comes back on humid days

Residue is still in the seams or wood. Repeat the enzyme treatment along the seams and dry thoroughly. If it keeps returning, the urine may be in the subfloor.

Dark, discolored spots on the boards

Urine has reacted with the finish or the wood. Cleaning won't remove it; the area needs refinishing or the boards replaced.

The finish turned cloudy after cleaning

Moisture got into the finish. Let it dry fully. If it stays cloudy, the finish may need a professional recoat.

Safety

• Wear gloves and wash your hands after cleaning urine.
• Never mix chlorine bleach with ammonia or acids.
• Keep the dog off treated areas until they're dry.

Never mix cleaning products; see chemicals you must never combine.

Questions

Dog urine on other surfaces

• Dog urine stains: the complete guide
• Dog urine on carpet
• Dog urine on a couch
• Dog urine on a mattress

Other stains on wood

• How to clean wood
• Cat urine on wood
• Mildew and mold on wood