Rigid-core vinyl flooring, such as Stone Plastic Composite (SPC), is engineered to be structurally stiff, which helps bridge minor subfloor dips and prevents the telegraphing of subfloor texture. Flexible vinyl planks are thinner and conform closely to the shape of the floor below, which often reveals imperfections or debris. However, even with rigid-core products, excessive subfloor variance can compromise the locking mechanisms, leading to joint separation or floor failure. It is essential to measure subfloor flatness using a straightedge; if the subfloor exceeds the manufacturer’s specified tolerance (typically expressed as a deviation over a 10-foot span), professional leveling or patching compound is required before installation.
Ask an ExpertChoosing the Right Flooring
Should I choose rigid-core or flexible vinyl for uneven subfloors?
Rigid-core vinyl (SPC/WPC) is generally superior for uneven subfloors because its stiff construction resists telegraphing, where minor imperfections show through the top surface. Flexible vinyl (LVT) is thinner and more pliable, making it highly susceptible to showing bumps or indentations from the subfloor. While rigid-core is more forgiving, most manufacturers still define strict flatness tolerances. Always check the installation manual to ensure your subfloor meets the required levelness.