Why LVT Flooring Deforms After Installation

Why LVT Flooring Deforms After Installation Peaking Buckling and Seam Issues

Some homeowners find their LVT floor looks perfect at installation but within months develops problems. Planks lift at the seams. Edges curl upward. The floor surface becomes uneven. This article explains why these issues happen from a factory perspective.

Peaking at the Seams

Peaking happens when the edges of two adjacent planks push against each other and rise upward. The seam forms a visible ridge.

The main cause is expansion from temperature changes. LVT has a PVC core. PVC expands when temperatures rise. If the floor was installed in cool weather and the room heats up in summer, the planks expand. With no room to expand they push against each other and lift at the seams.

Insufficient expansion gap is the most common cause. LVT floating floors need a gap around the perimeter typically 6mm to 10mm. If the gap is too small or blocked by baseboards, the floor has nowhere to expand.

Sunlight exposure makes it worse. Rooms with large windows heat up significantly on sunny days. The floor absorbs heat and expands. The areas near windows show peaking first.

Buckling or Rippling

Buckling appears as a wave across the floor surface. The planks lift from the subfloor in a continuous line. This is more severe than peaking and affects larger areas.

Buckling is caused by excessive heat or moisture. In extreme cases the LVT expands so much that the entire floor lifts. This can happen when direct sunlight heats the floor through a window. The dark colored planks absorb more heat than light colored ones.

Improper subfloor preparation also causes buckling. If the subfloor is not flat, the planks bridge over low spots. The pressure at the high spots creates buckling points.

Adhesive Failure in Glue Down LVT

Glue down LVT does not have expansion gaps. The adhesive holds the planks in place. But adhesive can fail over time.

The main cause of adhesive failure is moisture from the subfloor. Concrete slabs release moisture vapor continuously. Over months this moisture breaks down the adhesive bond. The planks loosen and lift at the edges.

Poor adhesive selection is another cause. Not all adhesives are rated for LVT. Some adhesives are designed for sheet vinyl and do not bond well with thicker LVT planks. Using the wrong adhesive leads to failure within months.

Temperature also affects adhesive performance. Adhesive has a working temperature range typically 18 to 29 degrees Celsius. Installation outside this range means the adhesive does not cure properly. The bond fails later.

Seam Issues Without Visible Expansion

Some LVT floors show seam issues even when the planks are not visibly buckled. The edge of one plank is slightly higher than the adjacent plank. This creates a lip that catches feet and collects dirt.

This is caused by inconsistent core density. Budget LVT has varying density across the plank. The edges may be slightly thicker or thinner. When installed the height difference creates a lip.

Low quality locking systems also contribute. The locking mechanism does not hold the planks at the same height. One plank sits slightly above the other.

How to Prevent These Problems

Allow the LVT to acclimate in the room for 48 hours before installation. Install at room temperature between 18 and 29 degrees Celsius with humidity between 35 and 65 percent. Leave the correct expansion gap around the entire perimeter. For glue down installations check concrete moisture before applying adhesive. Use the manufacturer recommended adhesive. Choose LVT from a reputable manufacturer with consistent core quality.

About PROLEADER

PROLEADER LVT products use consistent density cores and quality locking systems. Contact us for installation guidelines and product specifications.