Why is my new floor buckling?

Author: Eden Littel  |  Last update: Thursday, February 12, 2026

Buckling wood floors are a result of individual floorboards expanding and contracting typically due to moisture changes. All hardwood will expand and contract due to seasonal changes in most regions of the US. Usually, the floorboard changes are small and will reset to their original size and position.

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 do new wood floors buckle?

Wood shrinks and swells as the humidity changes with the seasons, and mostly across the width of the boards (very little end to end.) If installed without adequate space to allow for this to occur the floor will buckle when it's reached the walls and swells/expands more.

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.

How long does it take for new hardwood floors to settle?

Wait at least 24 to 48 hours before walking on newly installed hardwood floors. The curing process can take several days or weeks, depending on factors such as humidity levels and the type of finish used.

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Why are my new hardwood floors separating?

More specifically, you could be experiencing hardwood floor splitting because: The wood was installed in an uncontrolled environment—meaning it was outside the 35 – 55 percent relative humidity (RH) range that's used throughout the industry. The wood wasn't acclimated properly before installation.

What happens if you don't let wood flooring acclimate?

Failing to properly acclimate wood flooring may cause excessive expansion, shrinkage, dimensional distortion or structural damage.

How to stop hardwood floors from buckling?

Regular Maintenance Tips
  1. Clean Spills Immediately. Water is the enemy of hardwood floors. ...
  2. Avoid Wet Mops. While it might be tempting to use a wet mop for quick cleaning, it can introduce too much moisture to the wood, causing it to swell and buckle. ...
  3. Use Rugs and Mats. ...
  4. Regular Inspections.

When should I be worried about uneven floors?

Foundation Cracks

Even minor cracks can create uneven areas. Regardless of your flooring type, you will notice these differences. On hardwood or tile floors, pieces may pop up and become displaced. Uneven floors are often the first sign that your home requires professional foundation repair.

How to fix a bulge in a hardwood floor?

As mentioned, weather and moisture are the most common culprits of buckling wood floors. If the buckling is minimal, you can try drying the damaged area and see if it returns to its normal shape. You can also try putting a little pressure or a heavy object on the buckled wood to settle it back into its place.

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.

Why is my new hardwood floor wavy?

It's common for moisture to enter the floorboards from below through the subfloor. This is why the bottom of the board swells and makes the edges curve upward into an almost wave-like pattern. Cupping can happen even to a flawlessly-installed wood floor, depending on the conditions of the building and the environment.

What does a buckled hardwood floor look like?

The most common signs of buckled hardwood flooring are cupping and crowning. Lifting is the hallmark of extreme buckling and typically will only occur after a major water catastrophe like flooding.

What would cause a wood floor to buckle?

But when there's too much moisture and heat and walls prevent it from expanding out to the sides, it will expand upward. As floorboards continue to swell and rise up, separating from the subflooring and neighboring boards, they cause bumps and humps in the flooring surface. This is known as buckling.

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.

How much uneven floor is acceptable?

Subfloor unevenness cannot be greater than 3/16 of an inch over a 10-foot span or 1/8 inch over a 6-foot span. Subfloors must not slope more than ½ inch per 6 feet (25 mm per 1.8 m) Subfloors must be structurally sound.

Do uneven floors always mean foundation problems?

If you're considering purchasing a home with uneven floors, don't wait to investigate the potential issues beneath the home's surface. The slope or slant of the floor may be a minor cosmetic issue, or it could indicate water damage or major problems with the home's structure or foundation.

How much does it cost to fix uneven floors?

Moderate damage: For areas with uneven joists or minor subfloor issues, repairs could cost between $1,000 and $5,000, depending on the extent of the damage and the repair technique used. Major structural repairs: If the problem stems from foundation issues or severely damaged joists, costs can climb significantly.

Does homeowners insurance cover buckling floors?

Many homeowners are facing hurricane-related water-damaged floors this year, so if you're looking at buckling hardwood or bubbling laminate, you're not alone. Most homeowners don't realize that insurance will likely cover their floor's water damage.

Can humidity cause wood floors to buckle?

During the summer, all wood floors tend to expand because wood reacts to moisture. Air with a high moisture content (MC) or high relative humidity (RH) causes wood to gain moisture. Extreme moisture can cause cupping (when the edges raise higher than the middle of the wood planks) or even buckling.

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.

Will flooring acclimate in the box?

Will hardwood flooring acclimate in the box? Not unless they are opened. Boxes must be opened along the seams and the plastic removed for best results. Dry-fit a few boards together to ensure proper fit and finish and verify color and species with the homeowner.

How long does it take for wood floors to settle?

After installing your wood floor, whether it is solid or engineered, we strongly recommend that you allow it to settle for at least 48 hours. This waiting period allows your wood floor to acclimatize to the room's environment.

When should you not install hardwood floors?

Rooms with high humidity are generally not suitable for hardwood flooring. This is almost always solved by installing engineered flooring and/or using a finish and sealer.

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