The short answer
Common Causes of Lifting Boards
Moisture is the main reason floor boards rise. Water can come from a leaking pipe, an overflowing appliance, or a slow drip from an air conditioner line. When wood absorbs water, it expands and pushes upward. Even laminate flooring can lift if moisture gets trapped under the click-lock edges.
High humidity in a room can also cause boards to swell. In a dry climate, floors usually stay stable, but a sudden leak or a flood can change that quickly. If you notice lifting after a heavy rain or a plumbing issue, water is likely the culprit.
- Leaking water heater or washing machine hose
- Overflowing sink, bathtub, or toilet
- AC drain line backup or overflow
- Cracked grout or tile letting water through
- High indoor humidity from poor ventilation
How to Tell If Moisture Is the Problem
Look for other signs of water damage. Check for dark spots, a musty smell, or soft spots when you walk. If the boards are only lifting in one area, trace it back to a nearby water source. You can also use a moisture meter to confirm dampness, though a simple touch test often works.
If the lifting is widespread and you haven't had a leak, the issue might be humidity. Use a dehumidifier and see if the boards settle. But if the problem persists, you likely have hidden moisture that needs professional attention.
Steps to Take Right Away
First, stop the water source if you can. Shut off the valve to a leaking pipe or turn off the appliance. Then dry the area thoroughly. Open windows, use fans, and place towels to soak up standing water. Remove any wet rugs or furniture that could trap moisture.
If the water came from a burst pipe or a flood, you may need to remove the affected flooring to let the subfloor dry. Acting quickly reduces the chance of mold and further damage. If you're unsure how far the water spread, consider a professional inspection.
- Shut off the water source if possible
- Remove standing water with towels or a wet vacuum
- Set up fans and a dehumidifier
- Lift the edges of boards to let air circulate
- Document damage with photos for your insurance claim
When to Replace Versus Repair
Some boards may settle back down after drying, but often the swelling is permanent. If the boards are cupped or buckled, they usually need replacement. Hardwood can sometimes be sanded and refinished, but laminate rarely recovers once it has swollen.
For a single board, you might be able to pull it and swap in a new one. But if the damage covers a large area, you may need to remove sections or the entire floor. The pros can assess the subfloor and tell you what's salvageable.
Getting Professional Help
If the water damage is extensive, or if you can't find the source, it's time to call in local water damage pros. They have moisture meters and dryers that can handle the job. They can also check for mold behind walls and under floors.
The cost of repair depends on the extent of the damage, the type of flooring, and how much needs to be removed. It could range from a few hundred dollars for a small repair to several thousand for a whole room. Your insurance policy may help, but check your policy for details.
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Call Now (480) 898-4279Frequently asked questions
Can I fix lifting floor boards myself?
Sometimes, if you catch the leak early and dry the boards fast. But if the swelling is severe, you'll likely need to replace boards. DIY repairs work for small areas, but large damage is a sensible job for the pros.
Will my insurance cover floor board damage?
Policies vary, and your insurer decides what is covered. Sudden leaks, like a burst pipe, are often covered, but gradual damage from humidity may not be. Contact your insurance company to find out.
How long does it take for floors to dry after a leak?
Drying time depends on the amount of water, the flooring type, and airflow. It can take a few days to a week with fans and dehumidifiers. The pros use industrial equipment to speed up the process.