---
title: "How to Fix Laminate Flooring That Is Lifting"
url: https://shortridgearchitects.com/how-to-fix-laminate-flooring-that-is-lifting/
description: "Learn why laminate flooring lifts and how to fix it. Step-by-step DIY repairs for expansion gaps, moisture damage, and subfloor issues."
published: 2026-09-16
updated: 2026-09-16
---

# How to Fix Laminate Flooring That Is Lifting

Published 2026-09-16

Laminate flooring that is lifting can usually be fixed by addressing the underlying cause, such as insufficient expansion gaps, moisture damage, or an uneven subfloor. The repair may involve trimming the boards, drying out moisture, or releveling the subfloor, and in some cases, replacing damaged planks. Start by identifying why the floor is lifting, then apply the appropriate fix.

## Why Laminate Flooring Lifts

Laminate flooring is a floating floor system, meaning the planks are not glued or nailed to the subfloor but interlock with each other. This design allows the floor to expand and contract with changes in temperature and humidity. However, if the floor is installed without adequate expansion space around the perimeter, the planks can press against walls or other fixed objects, causing them to lift or buckle in the middle. Moisture is another common culprit: excessive water from spills, leaks, or high humidity can cause the fiberboard core of the laminate to swell, leading to lifting at the seams or edges. An uneven subfloor can also prevent the locking system from engaging properly, resulting in peaks and gaps. According to Tapi, common causes include insufficient expansion gaps, poor underlay installation, moisture damage, and failure to acclimate the flooring before installation (Tapi).

## Assessing the Cause of the Lift

Before attempting any repair, determine why the floor is lifting. Check the perimeter of the room: if the flooring is tight against the walls, the expansion gap is likely too small. Look for signs of moisture, such as water stains, warping, or a musty smell. If the floor feels bouncy or spongy, the subfloor may be uneven. In some cases, the lift may be localized to a few planks, indicating a problem with the locking mechanism or a specific area of moisture. A DIY Stack Exchange user described a floor that rose in the middle during cold, damp weather, suggesting moisture-related expansion (DIY Stack Exchange).

## Fixing Lifting Due to Insufficient Expansion Gaps

If the floor is lifting because it lacks room to expand, you need to create or enlarge the expansion gap. This typically involves removing the baseboards or quarter-round molding and trimming the edges of the laminate planks. The exact gap size varies by manufacturer, so check the installation instructions for your specific flooring. After trimming, reinstall the molding to cover the gap. This fix is often effective for floors that lift in the middle or at the edges due to expansion pressure. Tapi recommends trimming the expansion gap as a solution (Tapi).

## Repairing Lifting Caused by Moisture

Moisture damage requires addressing the source of water and drying the floor. If the lift is minor and the planks are not permanently warped, you may be able to dry the area with fans or a dehumidifier. However, if the laminate has swollen significantly, the affected planks will likely need to be replaced. To replace a plank, you can either disassemble the floor from the nearest wall to the damaged area or cut out the damaged plank and glue in a new one. When gluing, use a moisture-resistant adhesive and ensure the new plank is properly acclimated. The Fine Homebuilding forum suggests squeezing glue into the seam, pressing the plank into place, wiping off excess with acetone, and covering with wax paper until dry (Fine Homebuilding).

## Correcting an Uneven Subfloor

If the subfloor is uneven, the laminate may not lie flat, causing lifting or bouncing. To fix this, you may need to level the subfloor using a self-leveling compound or by sanding down high spots. This is a more involved repair that may require removing the laminate flooring. Tapi advises calling a professional for uneven subfloors, as precision is crucial (Tapi).

## Preventing Future Lifting

To prevent laminate flooring from lifting, ensure proper installation with adequate expansion gaps, acclimate the planks to the room's temperature and humidity for at least 48 hours before installation, use a suitable underlayment, and avoid excessive moisture. Clean the floor with a slightly damp mop rather than a wet one, and promptly wipe up spills. Regularly inspect for signs of moisture or movement. The Instructables guide suggests using silicone or hot glue to secure boards to the wall in problematic areas, though this is a less conventional method (Instructables).