Yes, prolonged exposure to standing water will ruin traditional laminate flooring. Because the inner substrate is constructed from compressed wood-composite fiberboard, any liquid that seeps through the seams causes the core to absorb moisture, expand, curl at the edges, and lose its structural integrity permanently. While modern water-resistant laminates can tolerate quick cleanups of accidental surface spills, major leaks or standing water will cause irreversible damage.
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