The primary difference lies in structural composition. Solid hardwood is a single, homogeneous piece of wood; it can be sanded and refinished multiple times over its life, making it a long-term investment. However, it is susceptible to expansion and contraction with humidity changes. Engineered hardwood is constructed by bonding a high-quality wood veneer to several layers of cross-grained plywood or composite materials. This 'cross-ply' construction provides superior resistance to warping and allows the product to be installed in environments where humidity might fluctuate, such as over concrete slabs or in basements, where solid wood might fail.

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