How do you fix a bulging floor?

Author: Prof. Maxie Toy DDS  |  Last update: Tuesday, November 18, 2025

How to Fix Floor Bulging Upwards?
  1. Step 1: Identify the cause. ...
  2. Step 2: Remove any obstacles and Assess. ...
  3. Step 3: Address moisture issues. ...
  4. Step 4: Relieve pressure on the bulge. ...
  5. Step 5: Investigate the subfloor and joists. ...
  6. Step 6: Flatten the bulging area. ...
  7. Step 7: Secure the floorboards. ...
  8. Step 8: Replace damaged flooring.

Will buckled floors go back down?

depends on how much the buckling is but outside of resanding the entire floor, there is no easy solution. Wood buckles and will not return to its previous state. Its wood.

Why is my floor puffing up?

Moisture damage is one of the primary causes of a floor bulging upwards, often resulting from high humidity levels, leaks, or inadequate moisture control. When moisture seeps into the wood, it can cause swelling, warping, or cupping, leading to an unattractive and potentially hazardous situation.

How do you flatten a swollen hardwood floor?

Flattening a swollen hardwood floor involves reducing the moisture content. Here's a step-by-step guide: Identify the Moisture Source: Check for any leaks or high humidity areas. Use Dehumidifiers: Dehumidifiers can help reduce indoor humidity levels.

Will warped floors go back to normal?

They may return to the original size (or smaller) over time if you manage to bring the humidity down, but you'll probably need to take the boards out and reinstall them correctly. It's a hassle, but not unrealistic - they're made to snap in and out.

Buckling Floor Solutions

Why is my floor bulging upwards?

Leaking appliances or moisture from a concrete subfloor can buckle your wood floors. When it gets wet and moisturized, the wood must accommodate the humidity. Thus causing the hardwood planks to swell. It would need to move upward and expand, which leads to buckling of the wood floor.

Can you flatten swollen laminate flooring?

Apply weight to the floor: Once the area has started to dry, place heavy items, such as books, on top of the affiliated planks. This will help flatten them back into place while they dry.

Can warped wood floor be straightened?

Yes, warped wood floors can often be straightened. The method depends on the severity of the warp. For minor warping, sanding the affected area can be effective. Sanding removes the top layer of the wood, making it flat again.

Will swollen wood floor shrink?

So if the air is humid, the wood will absorb more moisture from the air, and it will swell. If the air is dry, wood fibers will release some of its moisture back into the air and it can shrink back down.

Will swollen wood go back to normal?

Yes, a swollen door will go back to normal. The swelling is caused by humidity and temperature changes, which cause the wood to expand and contract.

How do you fix a bloated floor?

One common DIY solution for repairing swollen laminate flooring is to carefully remove the affected planks, dry them thoroughly, and then reinstall them once they have returned to their original size. It is essential to identify the root cause of the swelling, which is often moisture-related.

How to fix a bouncy floor?

Often, floor bounce can be reduced by simply tightening loose connections: Locate areas where the subfloor may have separated from the joists. Drive screws through the subfloor into the joists to secure any loose sections.

How do you fix a warped floor?

Sanding can often restore the shape and appearance of warped hardwood, especially in cases of cupping. However, it may not work for buckled planks. Refinish with a polyurethane coating to protect your planks from humidity and water.

What happens if you don't fix sagging floors?

Structural Weakness: When floors sag, it often means that the beams and joists supporting them are weakened or damaged. This can lead to further deterioration and issues such as cold air leaks, pests, wall separation, and collapsing floors.

What time of year do floors expand?

Your wooden floor is likely to start expanding again in the springtime. When the air naturally warms up and the environment becomes more humid again, your planks of wood will start to absorb some moisture and begin to expand again.

How to fix a bulging floor?

If you've eliminated the moisture issue, minorly buckled planks may simply return to normal given time. For boards that are cupping, add weight to the floor by setting a few heavy boxes on top. It's simple but it really does work. For serious buckling, you may need to consider replacing an area of your floor.

Can you flatten swollen wood?

Cover the swollen furniture with a wet rag and set your iron to a low-temperature setting. Hold the iron down on the rag for a few seconds. Be careful not to hold the iron in the same place for too long as this could further damage the wood.

How much does it cost to fix a water damaged floor?

Repairing water damage can cost anywhere from $8 to $100 per square foot, depending on the severity. Water damage can cause problems like warping, staining, and mold. The repair needed depends on the cause, but it may involve sanding down warped areas, applying wood filler, or refinishing the entire surface.

How do you flatten a buckled hardwood floor?

One of the first things to do, when you notice signs of buckling and warping in your hardwood floor is to determine the extent of the damage. Minimal buckling can even be repaired by just placing a heavy weight on the buckled area and forcing it to settle back into its space.

Can warped wood be straightened?

To flatten a warped piece of wood, you'll need to change the moisture content on one side of the board. Look at your warped board and identify the inside face of the “C” or cup. The wood fibers on this side of your board are dryer and have shrunk. You can use water to relieve the tension and allow the board to flatten.

How to fix wood floor swelling?

How to Fix Water Damaged Swollen Wood Floor. If the floor is swollen because of humidity, then you need to install ventilation fans to dry out your room. You can set up a dehumidifier in the room to help dry out the flooring, capture the moisture, and speed up the process.

How do you remove a bulge from laminate flooring?

Minor bubbles can be fixed by “bursting” them. Place a damp cloth on the bubble and cut a slit on the bubbled area using a sharp knife. Squeeze wood glue into the slit you have opened and press the veneer down. Place a weight overnight so that it is entirely flattened.

How do you dry out a swollen laminate floor?

Open windows and doors to improve air circulation in the room. Use fans to help dry out the flooring more quickly. A dehumidifier can also be effective in reducing moisture in the air, which aids in drying.

Will my cupped wood floors flatten?

In many cases, floors with minor cupping will flatten out once the underlying moisture issues have been addressed.

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