Water-Damaged Hardwood Floors: What to Do (and When to Call a Pro)

Water and hardwood are old enemies. The first 24 hours decide everything.

First hour

1. Stop the water source. Shut off the line, the angle stop, or main if needed.
2. Pull up standing water. Wet vac everything. Towels for what the wet vac can't reach.
3. Lift area rugs and pads. They trap water against the floor and start cupping.
4. Move furniture out of the wet zone. Felt pads soaked with water transfer wood stain to the wood underneath.
5. Open windows, run AC. Get airflow over the floor.

Hours 1 – 24

• Set up box fans aimed across the floor. Air movement is everything. The faster the floor dries on the surface, the less water gets pulled deep into the wood.
• Run a dehumidifier in the room. Pull water out of the air so it can't go back into the floor.
• Skip heat. Heating wet wood drives the water deeper and can warp boards faster. Use airflow and dehumidification, not heat.
• Don't put rugs back. Even after the surface looks dry.

What you're looking for over the next week

• Cupping (board edges higher than centers). Means water is in the wood. Some cupping flattens as the floor fully dries; some becomes permanent.
• Crowning (board centers higher than edges). Usually means the floor was sanded while still wet - typically a refinishing mistake, not a leak.
• Discoloration / dark stains. Water has gone deep into the wood fiber. May fade as the floor dries; may not.
• Lifting at seams or board ends. Adhesive (engineered) or fastener (solid) failure from water exposure.

When to call a pro

• Standing water that touched hardwood for more than 4 – 6 hours. Water has likely reached the subfloor.
• Visible cupping, crowning, or lifting after 7 days of drying. The floor isn't recovering on its own.
• Any musty smell. Mold may be starting under the boards or in the subfloor.
• Leak source you can't identify. A water-stained floor with no obvious cause means the leak is hidden - find it before fixing the floor.

Repair vs replace decisions

• Localized damage (one room, a few boards): board replacement, refinish, done.
• Single room with widespread cupping: assess after 14 days of drying. May still recover; may need replacement of that room.
• Multi-room damage or subfloor involvement: likely full replacement of affected area. Subfloor first, then floor.
• Mold present: subfloor and adjacent material removal is required before any flooring goes back down. Don't skip this.

Prevention going forward

• Water sensors at washing machine, dishwasher, refrigerator water line, and water heater. They text your phone when they detect water. Cheap insurance.
• Annual visual check of all angle stops and supply lines.
• Replace washing machine hoses every 5 years (braided stainless lasts longer).
• Caulk around dishwashers and bathroom sinks.

If your floor has water damage, call us before it gets worse - early action saves a lot of floor.