I was recently in a retail store here in Chicago and discovered a text book case flooring issue. Wood flooring is directly impacted by the relative humidity and it needs to be maintained at 35-50% regardless of where you live. This is the standard which the NWFA – National Wood Flooring Assocication states. Wood is hygroscopic which means it adapts to the environment it is in, much like your skin for a comparison. In the winter time we turn the heat on and this causes the wood to shrink and potentially create gaps in your floor, it’s not defective, the wood is simply shrinking due to the lack of humidity. In the summertime with a higher relative humidity, the wood swells and depending on species, fills back in.
Consumers and commerical clients alike need to understand that no manufacturer warrants against this issue. The reason? It’s not a defect, it’s simply wood reacting to the environment. It’s essential to maintain the proper humidity with a built in humidifier or a portable humidifier and everyone should have a hygrometer to measure the conditions.


