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How to Fix Water-Damaged Laminate Floor Bubbles?

Last updated October 31, 2026

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The short answer

Why Laminate Bubbles

Laminate flooring is made of layers of fiberboard and resin. When water soaks into the seams or edges, the fiberboard core swells. That swelling pushes the top decorative layer upward, creating a bubble or blister. The damage is permanent because the core does not shrink back to its original size once it has expanded.

The bubble might look minor, but the structural integrity of the plank is compromised. Even if you dry the surface, the swollen core remains. You can sometimes reduce the appearance by pressing it flat, but the bond between the layers is often broken. This means the bubble can reappear or worsen over time.

Drying the Area First

Before you attempt any repair, make sure the area is completely dry. Use towels to blot up standing water. Then set up fans or a dehumidifier to pull moisture from the floor and the subfloor beneath. Drying can take several days, especially in a humid climate like Quincy, where coastal nor'easters bring damp air.

If the moisture has soaked into the subfloor, you might need to check for mold. Mold can develop within 24 to 48 hours in damp conditions. If you see any dark spots or smell a musty odor, stop and call a mold professional. Do not try to seal the bubble until you are certain the area is dry.

  • Blot up all standing water with towels or a wet vacuum.
  • Run fans and a dehumidifier for at least 48 hours.
  • Check for discoloration or a musty odor that signals mold.
  • Do not walk on the area until it is fully dry.
  • If the bubble is small, try the iron method once.
  • If the bubble persists, move on to replacement.

When Replacement Is the Right Choice

If the bubble is larger than a few inches across, or if the plank has visible cracks, replacement is the smarter choice. A patched bubble will never look seamless, and it can weaken the surrounding planks. You also risk trapping moisture, which can lead to mold and further damage.

Replacing a laminate plank is a project you can do yourself if you have spare flooring from the original installation. You will need a circular saw, a utility knife, and a pry bar. But if you do not have spare planks, you may need to buy a new box, which may not match the existing color and finish.

If the damaged area is large or if the water has spread under many planks, the pros are better equipped. They can remove the affected sections, dry the subfloor, and install new laminate that matches. They also have the tools to check for hidden moisture and mold, which you might miss.

DIY Replacement Steps

To replace a single plank, start by removing the baseboard or quarter-round near the damaged area. Then use a circular saw to cut a line across the middle of the damaged plank, but stop short of the edges. Insert a pry bar into the cut and gently lift the plank pieces out. Be careful not to damage the adjacent planks.

Once the damaged plank is out, clean the subfloor and let it dry completely. Then slide the new plank into place, locking it with the tongue and groove. If the new plank does not fit due to the surrounding rows, you may need to disassemble the floor from the nearest wall. This is more involved but doable.

Preventing Future Bubbles

Laminate flooring is not waterproof, so prevention is key. Wipe up spills immediately, especially in kitchens and entryways. Use mats at doors to catch rain and snow. Avoid using a wet mop; instead, use a damp cloth or a laminate-safe cleaner. Excess water is the main cause of bubbles.

If you live in Quincy, keep an eye on areas near windows, sliding doors, and appliances like dishwashers or refrigerators. A slow leak from a supply line can go unnoticed for weeks. Check under sinks and around appliances regularly for signs of moisture. Fix any leaks right away.

  • Wipe up spills as soon as they happen.
  • Use doormats at exterior doors.
  • Clean with a damp cloth, not a wet mop.
  • Inspect under sinks and around appliances for leaks.
  • Use a moisture barrier under new laminate.
  • Leave an expansion gap at the walls.

Water damage does not wait

Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.

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Frequently asked questions

Can I pop the bubble like a blister?

Do not pop the bubble. Puncturing the surface will make the damage worse and allow more moisture into the core. It also creates a hole that is hard to repair. Instead, try the iron method or plan to replace the plank.

Will the bubble go away on its own?

No, the bubble will not disappear. Once the fiberboard core has swollen, it stays swollen. Drying the surface might reduce the appearance slightly, but the bubble will remain. Replacement is the only way to fully fix the floor.

Should I call a professional for a small bubble?

For a very small bubble, you can try DIY methods. But if the bubble is large, if you lack spare planks, or if you are unsure about the extent of water damage, call local water damage pros. They can assess the subfloor and decide if replacement is needed.

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