Most homeowners deal with lifting laminate at least once in their life. The good news is that in most cases you don’t have to pull up the whole floor—usually you can fix it within a couple of days.
Reasons Laminate Lifts
Take a moment to figure out what’s going on underneath before trying to fix the problem. It will definitely save you some time.
Water Damage
The core of laminate planks is high-density fiberboard (HDF)—a material that swells noticeably when it absorbs water. Once that core expands, it pushes upward and the surface layer starts to separate.
The water source isn’t always obvious. It could be a slow leak under a dishwasher, steam from regular mopping, humidity that’s been sitting too high for too long, or moisture rising up from a concrete subfloor that was never properly sealed. Make sure to check the kitchen, bathroom, and basement—these are the highest-risk rooms.
Missing Expansion Gaps
Laminate isn’t attached to the subfloor, so it can expand and contract freely as temperature and humidity change. For this to work, there needs to be a small gap between the planks and every fixed surface around the perimeter of the room.
When installers skip this gap, the floor has nowhere to go during expansion. The pressure builds until something gives, and the planks buckle upward. This type of lifting happens in the center of a room rather than at the edges.
Uneven Subfloor
If the subfloor has dips, humps, or soft spots, the laminate above will flex and move with foot traffic. Over time, this flexing loosens the tongue-and-groove joints and causes sections to lift.
Temperature and Humidity Swings
Seasonal changes affect laminate more than people expect. In humid summer months, planks expand. In dry winter months with the heat running, they contract. When indoor humidity climbs above 55%, moisture starts to work its way into the material. To protect laminate, keep the indoor humidity between 35% and 55%.
Tools and Materials
Tools: Rubber mallet, tapping block, pry bar, putty knife, utility knife, tape measure, straight edge, wall spacers, oscillating multi-tool (for plank trimming).
Materials: Wood glue or contact cement rated for flooring, painter’s tape, heavy objects for weight (books, filled boxes), moisture meter, replacement planks if needed.
How to Fix Lifting Laminate
Minor Lifting at Seams (No Visible Damage)
For click-lock systems, place a tapping block against the raised edge and tap gently with a rubber mallet, working from a secured area toward the lifted section.
For glued systems, or if tapping doesn’t hold, carefully lift the edge with a putty knife, apply a thin bead of wood glue along the joint, press the plank back down firmly, then lay heavy books or weights across the area for 24 hours. Run painter’s tape across the seam while it dries to hold everything in position.
Buckling in the Middle of the Room
This one almost always points to an expansion gap problem. Start by removing the baseboards along the nearest wall. Check whether there’s actually a gap between the laminate edge and the wall—chances are there isn’t one, or it’s too small.
Use an oscillating multi-tool or toe-kick saw to carefully trim the edge of the planks, creating a proper gap of ¼ to ⅜ inch. Once the pressure is relieved, the buckling in the center often settles on its own within a day or two. Weigh down any remaining raised sections with heavy objects and reinstall the baseboards once everything is flat.
Lifting at the Edges
Edge lifting is usually moisture-related. Before doing anything else, check for leaks near the affected area. Remove the baseboard, dry the area thoroughly with fans and a dehumidifier, and verify there’s an adequate expansion gap.
Once the area is completely dry, press the edges flat using weights. If the edge won’t stay down on its own, apply a small amount of waterproof wood glue underneath the lifted section and weight it down for 24 hours.
Water Damage
The first 24 hours matter most. Soak up standing water immediately — towels, mop, wet-dry vac, whatever’s handy. Then pull the affected planks from the nearest wall outward, row by row. Test the subfloor with a moisture meter before you even think about reinstalling; above 12% and it needs more time. Fans and a dehumidifier will do the work — just give them a few days. Use that time to sort through the planks and check for warping, soft spots, or any discoloration.
Water-damaged laminate doesn’t recover. IIf it’s swollen, it’s gone — replace it.
Replacing Individual Planks
For planks near a wall, take off the baseboard first and then work your way back row by row. Each plank tilts out at about 30 degrees — there’s a bit of resistance from the joint, but it releases cleanly if you don’t force it. Tape and number each piece as you remove it; the order matters when you’re putting everything back.
Mid-room damage is a different job. You’ll need a circular saw set to the exact depth of your flooring — go through a spare plank to dial it in. Score across each end of the damaged board about an inch in, then connect those cuts with one down the middle. Lift the center out, work the edges free with a pry bar, and you’ve got a clean opening for the replacement.
When to Call a Professional
Some situations require a pro’s help:
- Buckling or lifting affects a large part of the floor.
- There’s visible mold on the subfloor.
- The subfloor itself is soft or significantly uneven.
- Previous repairs didn’t hold.
- Your floor is under a manufacturer’s warranty.
Professional repair averages around $1,241. Most projects cost between $385 and $2,098, depending on damage type and local labor rates.
Repair Methods at a Glance
| Problem | Likely Cause | Fix |
| Seam lifting, no damage | Loose joint | Glue + weight for 24 hrs |
| Center of room buckling | No expansion gap | Trim plank edges, relieve pressure |
| Edge lifting | Moisture or gap issue | Dry, check gap, glue if needed |
| Water damage | Flooding or leak | Dry subfloor, replace planks |
| Warped or cracked plank | Impact or severe moisture | Replace individual plank |
Final Thoughts
A lifting floor doesn’t mean a ruined one. Get to it early, fix the real cause, and most of the time you won’t need to replace a single extra plank. Here’s what you can do to keep it from happening again:
- Control the humidity level.
- Clean up spills instantly.
- Avoid wet mopping.
- Put mats at exterior doors.
- Check under appliances periodically.
- Give new laminate time to acclimate.
