Water can harm wood floors. It causes swelling, stains, and mold. You can fix many cases if you act fast. This guide shows how to check damage, dry the floor, and repair it. Follow these steps to save your floors.
Signs of Water Damage on Wood Floors
Look for these problems right away.
Common Signs to Spot
- Boards curve up at edges. This is cupping.
- Center of boards rises. This is crowning.
- Floors lift from the base. This is buckling.
- Dark spots or stains appear.
- Musty smell comes from the floor.
- Mold grows in damp spots.
Use a moisture meter to check wetness. Normal levels are 6% to 12%. Higher means trouble.
When Damage Is Severe
If boards are soft or rot, replace them. Mold spreads fast. It can harm health. Call a pro if you see black mold or big areas affected.
Stop the Water Source First
Find where water comes from. Check pipes, roofs, or appliances. Turn off water if needed. Fix leaks before you start repairs. This stops more harm.
Remove Water and Dry the Floor
Act within 24 hours. Water soaks in quick.
Tools You Need
- Wet vacuum.
- Fans.
- Dehumidifier.
- Towels or mops.
Step-by-Step Drying
- Vacuum up standing water. Use wet mode.
- Wipe with towels. Get all drops.
- Set fans to blow air over the floor.
- Run a dehumidifier. Keep humidity below 50%.
- Open windows if outside air is dry.
- Check subfloor. Dry under boards if you can.
Drying takes 1 to 2 weeks. Test moisture often. Wood dries slow. Rush it and boards may crack.
For hidden water, pros use air movers. They dry from below.
Clean and Remove Mold
Clean after drying starts. This kills germs.
How to Clean
Mix soap with water. Add a bit of bleach for mold. Scrub with a soft brush. Rinse well. Dry again.
Avoid harsh tools. They scratch wood.
For mold, see our guide on safe mold removal. It shows natural ways to kill it.
Learn more about mold safety from the EPA.
Check for Hidden Mold
Look under boards. Mold hides there. If you find a lot, get help. It can grow back.
Repair the Damaged Wood
Fix based on damage level.
For Minor Damage
Sand high spots. Use a sander with fine grit. Refinish with sealant. Match the old finish.
Choose paint or stain. See our paint finish guide for tips.
For Major Damage
Replace boards. Cut out bad ones. Fit new wood. Nail or glue them.
Engineered wood handles water better than solid wood. It swells less.
Sand the whole area after. Seal to protect.
If subfloor is wet, dry it first. Replace rotted parts.
How Long Does Repair Take?
Minor fixes: 1 to 3 days. Full repair: 1 to 2 weeks. Add time for drying.
Costs vary. DIY saves money. Pros charge $5 to $10 per square foot.
Prevent Water Damage in the Future
Keep floors safe.
- Seal floors every 2 to 3 years.
- Use mats near sinks and doors.
- Fix leaks fast.
- Keep home humidity at 40% to 50%.
- Add barriers under wood.
For pet messes, check our pet odor removal guide.
Frequently Asked Questions
How Long Before Water Damages Wood Floors?
Damage starts in hours. Big leaks harm in a day.
Can You Fix Water Damage Without Replacing Floors?
Yes, for small areas. Dry and sand them.
Does Insurance Cover Water-Damaged Floors?
Often yes, if from sudden leaks. Check your policy.
Is Engineered Wood Better for Wet Areas?
Yes. It resists swelling more than solid wood.
When Should You Replace the Whole Floor?
If over half is damaged or mold is widespread.
Follow these steps. Your floors can last years. If damage is bad, call a pro. They have tools to check deep.