It’s nearly winter. That means that your hardwood floors are about to show cracks between the boards. If you’ve moved into a new house, these cracks could cause alarm. How could your brand new hardwood floors crack?

Gaps between boards, or cracks, if you will, are not the result of the wood floor failing or falling apart. They are the result of the wood planks shrinking as the relative humidity goes down and the wood floor loses moisture content. The air in the summer has a higher relative humidity than in the summer. This lets the wood flooring absorb moisture and swell. So usually gaps between boards go away in the summer. Then those gaps reappear in the winter as the humidity goes down again. (more…)