A.Tandy Reeves, a certified flooring inspector and CEO of Flooring Inspection Training Services in Tulsa, Okla., responds: Even though engineered hardwood flooring is more dimensionally stable than solid wood flooring, the wood-veneer layers that make up the face are susceptible to shrinking and swelling with changes in temperature and humidity. It's common for the top layer to face-check when the humidity varies as much as you describe, but most of that may disappear as the relative humidity elevates again over the summer.

As with all wood floors, one key to a successful installation — and to the long-term life of the wood floor — is to install and maintain the floor at a temperature between 60°F and 80°F, with the relative humidity measuring from 30 percent to 50 percent.

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