Laminate floor buckling is usually the result of preventable issues, often linked to moisture, installation mistakes, or subfloor problems. Moisture intrusion from spills, leaks, or wet cleaning methods can cause the planks to swell and lift. A lack of proper expansion gaps leaves no room for natural movement, creating pressure that forces the boards upward. Skipping acclimation before installation can lead to expansion or contraction after the floor is in place.
Uneven subfloors put stress on planks, while inadequate underlayment or moisture barriers allow shifting and water damage. Finally, improper installation techniques, such as over-tightening planks or using glue on floating floors, restrict movement. Addressing these causes early helps maintain a smooth, durable laminate floor. These problems are often the result of rushed or improper laminate flooring installation services.
Top Reasons Your Laminate Floor Keeps Buckling
If your laminate floor keeps buckling, it’s often a sign of underlying installation or moisture-related problems. Below are the main reasons behind this issue and how to address each one.
1: Moisture Intrusion from Spills or Leaks
Moisture is the most common cause of laminate floor buckling. Laminate is made of fiberboard, which absorbs water easily. When water seeps between planks or under the flooring, it causes the boards to swell. This pressure forces the planks to rise, creating visible buckles or soft spots.
Leaks from plumbing fixtures or appliances also contribute to this issue. In kitchens and bathrooms, poor sealing can allow water to seep in over time. Even wet mops or standing puddles can be harmful if not cleaned quickly. Identify and fix any leaks immediately. Avoid wet mopping and use a damp cloth instead. For wet areas, consider installing a moisture barrier or using water-resistant laminate flooring.
2: Lack of Proper Expansion Gaps
Laminate floors need space to expand and contract due to changes in temperature and humidity. During installation, a small gap typically ¼ inch is left around the perimeter. This allows the planks to move naturally without pressing against the walls or each other.
If there is no expansion gap or if the gap is too small, the flooring has nowhere to go. As a result, pressure builds up, leading to buckling near edges or transition points.
Check if the expansion gap was properly installed. If not, remove baseboards and trim a portion of the flooring to create space. Always follow manufacturer guidelines for gap measurements.
3: Improper Acclimation Before Installation
Laminate planks must acclimate to the room’s temperature and humidity before installation. Skipping this step can cause the planks to expand or contract after installation, leading to buckling.
Manufacturers typically recommend letting the flooring rest in the room for at least 48 hours. This allows the material to adjust to its environment and minimize movement post-installation. Always allow sufficient acclimation time before installation. Store the planks flat and unopened in the room where they will be installed.
4: Subfloor Irregularities or Uneven Surface
An uneven subfloor stresses laminate planks. If there are dips or high points, the flooring may flex or lift when walked on. Over time, this movement can cause buckling, especially in floating floor installations.
Subfloors made of concrete or plywood should be checked with a straight edge before laying laminate. Any surface irregularities should be leveled out completely. Use a leveling compound or underlayment to smooth out the subfloor. Ensure it is dry, clean, and stable before beginning the installation.
5: Inadequate Underlayment or Moisture Barrier
Underlayment provides cushioning, noise reduction, and moisture protection. If the wrong underlayment is used or if it’s missing altogether the floor can shift, squeak, or buckle. Concrete subfloors, in particular, require a vapor barrier to block moisture from rising.
Using incompatible underlayments may also void the flooring warranty, depending on the manufacturer. Choose an underlayment recommended for your flooring type and subfloor. For concrete subfloors, always install a moisture barrier.
6: Improper Installation Techniques
Mistakes during installation often lead to structural issues later. For example, forcing planks together too tightly can eliminate necessary expansion room. Using nails or glue on a floating laminate floor can restrict natural movement. These errors interfere with how the floor responds to pressure and humidity.
DIY installations without proper knowledge or training often result in buckling problems within the first few months. Hire a qualified professional for installation or strictly follow the manufacturer’s instructions. Never glue or nail floating floors unless the product specifically calls for it.
Conclusion
Most laminate floor buckling stems from overlooked details during or after installation. Moisture intrusion is the leading cause, whether from plumbing leaks, spills, or missing vapor barriers. Without correct expansion gaps, pressure builds and planks lift. Failing to acclimate flooring before use can also lead to misalignment. Subfloors that are uneven or improperly prepped add stress over time. Incompatible or missing underlayment increases the risk of moisture damage.
Common mistakes such as nailing floating floors or misaligned planks often create long-term structural problems. Heat exposure, heavy objects, and weak plank materials further increase the chance of warping. Preventing buckling requires a careful, step-by-step approach to product handling and setup. These risks are best avoided by choosing reliable, experienced laminate flooring installation services.