The primary difference lies in the core rigidity. Rigid-core products are designed to 'bridge' minor subfloor imperfections, reducing the risk of 'telegraphing,' where the subfloor texture shows through the surface of the plank. They often include a pre-attached underlayment for sound and comfort. Flexible LVP consists of a homogeneous or multi-layered solid vinyl construction. It is highly durable and thinner than rigid-core options, but because it is pliable, it requires a perfectly smooth subfloor, as any bumps or indentations will be visible on the surface. Flexible LVP is often glued down, whereas rigid-core is typically installed as a floating floor.
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What are the structural differences between rigid-core and flexible luxury vinyl planks?
Rigid-core LVP (SPC/WPC) is manufactured with a stable, stiff base that provides structural integrity and minimizes subfloor telegraphing. Flexible LVP is made from a pliable, high-density vinyl, allowing it to conform more readily to slight subfloor irregularities but requiring a perfectly flat base.