MAPIWhy Is My Laminate Floor Buckling?
Laminate is installed as a floating floor, so it needs room to respond to normal environmental changes. A raised or springy area often points to expansion pressure rather than a surface-only defect.
Pergo says changing humidity can make laminate boards swell or shrink. If the floor was installed without enough expansion space at the wall, the boards can come under pressure and rise.
Key takeaways
- Humidity changes can make laminate boards swell or shrink.
- Insufficient expansion space at the wall can put the floor under pressure and make it rise.
- A raised area that flexes when walked on is consistent with Pergo's description of a rising floor.
- The cause should be identified before boards are cut or replaced.
What it actually means
Laminate buckling is a raised, bowed, or lifted section of a floating laminate floor.
The main explanation
Pergo explains that fluctuating humidity can change board dimensions. When boards expand but do not have enough space at the perimeter, the floor can come under compression and rise.
Main causes and reasons
1. Humidity-driven expansion
Humidity changes can make laminate boards swell or shrink.
How to recognize it
- Problem changes seasonally
- Boards feel tight at room edges
- Raised area appears after humidity change
Why it matters: This is the environmental movement Pergo identifies behind some rising floors.
2. Insufficient expansion space
If laminate reaches the wall without enough clearance, expanding boards can push against the perimeter.
How to recognize it
- Board or row is tight against wall
- Floor bends or feels springy
- Buckling follows a row toward a wall
Why it matters: Pergo identifies inadequate space between floor and wall as a direct reason a floor may rise.
How to identify your situation
Expansion pressure is likely.
Next: Check perimeter clearance and follow the floor manufacturer's repair guidance.
Humidity-related board movement may be affecting multiple joints.
Next: Stabilize indoor conditions and inspect both gaps and perimeter clearance.
Direct moisture damage may be involved in addition to expansion pressure.
Next: Stop the water source and assess damaged planks separately.
What you can do
- Check whether the raised section is under tension near a wall.
- Review the product's required expansion gap.
- Stabilize indoor humidity before judging whether movement is ongoing.
- Do not force the floor flat while it is still constrained.
- Use model/product-specific repair guidance before trimming or replacing planks.
Common misconceptions
Pergo describes rising floors caused by expansion pressure that may be corrected when the constrained row is identified.
Floating laminate needs perimeter space so normal expansion can occur.
When it may be a bigger problem
Get a flooring professional if the floor is extensively swollen, affected by a leak, locked under fixed cabinetry, or remains distorted after expansion-space and moisture conditions are corrected.
Frequently asked questions
Can humidity make laminate flooring buckle?
Yes. Pergo says humidity fluctuations can make boards swell or shrink, and expansion can make the floor rise when perimeter space is insufficient.
Can a missing expansion gap cause laminate to lift?
Yes. Pergo specifically identifies inadequate space between the floor and wall as a cause of a rising floor.
Why does my laminate floor feel springy in one spot?
Pergo describes a rising floor as feeling like a bubble under the boards when a row is under tension.
Should I cut laminate before finding the cause?
No. First identify whether perimeter pressure, moisture, or another installation issue is responsible.
Sources
- How to fix a rising floor — PergoOfficial
Written by Mapiance Editorial Team
The Mapiance Editorial Team researches, writes, reviews, and maintains practical guides and explainers for MAPIANCE.
Reviewed by Mapiance Editorial Team
Published Sep 20, 2026 · Updated Sep 27, 2026 · Verified Sep 17, 2026