How do you tighten loose hardwood floors?

Author: Prof. Alden Bayer  |  Last update: Monday, December 1, 2025

To fix bulging or loose boards, tighten the boards with screws inserted from below. Use wood screws whose length will penetrate the subfloor but stop 1/4-inch below the surface of the finished floor. For large areas that squeak on the first floor, use steel bridging to keep the joists and the subfloor from shifting.

How to fix wood flooring that is lifting?

How to Repair Buckled Hardwood Floor
  1. Step One: Disassemble the Buckled Floorboards. ...
  2. Step Two: Clean the Subfloor and Back of the Floorboard. ...
  3. Step Three: Apply Professional Wood Floor Adhesive. ...
  4. Step Four: Replace and Apply Pressure. ...
  5. Step Five: Allow for Drying Time. ...
  6. Step Six: Recheck Humidity Levels.

How to fix loose tongue and groove flooring?

Apply construction adhesive to the subfloor, keeping an even distribution. Place the new board, fitting its end tongue into the groove of the adjacent board. Press down on the new board and use a hammer with a scrap wood block to tap it into place, securing a tight fit.

How do you flatten a swollen hardwood floor?

Here are the steps you can follow to fix a water-damaged, swollen wood floor:
  1. Step 1: Identify the source of water. ...
  2. Step 2: Remove standing water. ...
  3. Step 3: Dry the area and Assess. ...
  4. Step 4: Sand the swollen areas. ...
  5. Step 5: Apply wood conditioner. ...
  6. Step 6: Apply wood glue or epoxy. ...
  7. Step 7: Sand and refinish.

How to secure a loose floorboard?

Punch down nails to secure any loose floorboards to the joists. Loose boards are usually slightly raised compared to others in the surrounding area. Apply your body weight to the floorboard to flex it back down and into position. If the floorboards are nailed down, place a nail punch on top of the nail head.

How to Repair Squeaky Wood Floors | This Old House

Why are my wood floor boards separating?

Gaps in wooden floors are normal and occur when wood loses its moisture content. Some floors have deliberate gaps for preferred aged aesthetics such as a rustic look chevron floor. Wood expands and contracts when it absorbs or releases moisture. This natural movement exists in all wooden floors.

Are loose floorboards a problem?

However, if your floorboards are excessively loose and unstable, the gap filling may not hold up. Be aware. The bad news is, though, if your boards are particularly loose and tend to move, in cases where they don't have enough support from below, then expect a large chunk of your gap filling to fall off.

How do you tighten hardwood floors?

To fix bulging or loose boards, tighten the boards with screws inserted from below. Use wood screws whose length will penetrate the subfloor but stop 1/4-inch below the surface of the finished floor. For large areas that squeak on the first floor, use steel bridging to keep the joists and the subfloor from shifting.

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 loose plank floor?

To reinstall salvaged and new planks, use a brush, roller or trowel to apply a thin, even layer of adhesive on the underside of each affected floor panel. When your adhesive is ready, lay down the floorboards. Secure the planks by pressing down firmly on the center, edges and corners with a clean, dry roller.

Should tongue and groove be tight?

Correctly made the joint, the tongue and groove, will handle this movement as long as the groove is not too tight or loose, there is a gap between the end of the tongue and the back of the groove.

How to restore hardwood floors without sanding?

To refinish old wood floors without sanding, use a no-sand refinishing product, such as a liquid sander or refinisher, which helps to clean and etch the surface. First, clean the floor thoroughly to remove dust and dirt. Apply the refinishing product with a mop or cloth, working in small sections, and allow it to dry.

How to flatten a buckled hardwood floor?

Now for the answer to how to fix buckled hardwood 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.

Can I fix sagging floors myself?

Sagging floors are almost always a sign of a deeper structural problem that needs to be fixed. While it's possible to perform an inspection yourself, the job is better left to a trained professional.

Why has my wooden floor lifted?

If your hardwood flooring has started to raise or lift up, then it likely that it has not been fitted with the correct expansion gap around the perimeter of the room. As wood is a natural product it will naturally expand and contract with changes in temperature and humidity.

Why do my hardwood floors look wavy?

Wood is hygroscopic, meaning that it absorbs and releases moisture. When one side of the floor is exposed to excessive moisture, that side will expand, causing the whole board to warp away from that side. The sides of the boards curl up, resulting in the characteristic “U” shape of a cupped floor.

Will warped wood floor go back to normal?

Will Warped Wood Floor Go Back to Normal? In some cases, warped wood floors can return to their original state once the underlying moisture issue is resolved. Drying out the area is crucial.

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.

Can you fix swollen hardwood floors?

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 to fix a wobbly 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.

Why does my floor feel spongy when I walk on it?

Squishy or spongy flooring can sometimes be a sign of water damage, either to the boards themselves or the subfloor. This is often caused by using too much water on the laminate to clean it, such as using a sopping wet mop or steam mop, which damages the wooden core of the laminate boards.

How do you fix loose hardwood floor boards?

If the planks are too loose, use wood glue or finishing nails to secure them back in place. In extreme cases, a professional re-sanding and refinishing might be needed. For minor creaks, a quick DIY fix is placing shims or screws from underneath to tighten the boards.

When should I be concerned about sagging floors?

Generally, if your floor rises or falls more than half an inch over a horizontal run of 10 feet or less, you should call someone about your sloping floor. This degree of slope indicates that there is likely a problem with your floor or your foundation. With that said, it's also important to consider comfort and safety.

How many years do floorboards last?

Engineered floors are generally very durable and if properly maintained will last for decades. Engineered wood flooring consists of plywood, HDF, or softwood, combined with a layer of hardwood. The durable nature of engineered wood means that it should last for at least 25 to 30 years before needing replaced.

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