The core is the backbone of a laminate plank. A high-density core minimizes board deflection under weight, which prevents stress on the tongue-and-groove locking systems. Increased density generally results in less swelling when exposed to humidity and provides a more solid, wood-like feel underfoot. When investigating product quality, density is a key indicator of how well the floor will resist indentations and maintain its physical shape over years of seasonal temperature and humidity fluctuations.

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