Acclimation issues show up in some inspections that I perform. The typical response from the builder or installer is that the flooring was acclimated in the building for two weeks, "just like the book says." In some inspection reports, the inspector states that the flooring was acclimated for two weeks, and then rules out any potential acclimation issues.
Acclimation is not a time thing. Acclimation is about getting the moisture content (MC) of the flooring right; that is, to something near the long-term expected levels for that building. If the indoor environment isn't right or the length of time is wrong, acclimation will still happen, but to the wrong moisture level. For example, the target (long-term expected) MC for my house is 8%. If I brought wood with a MC of 6% into my house in the winter when the indoor EMC was 6%, the wood acclimates to 6%, not the 8% I want. If I bring 9% MC wood into my house in the winter, it could acclimate to 6% rather than the desired 8%.
Once you’ve decided to install or refinish a wood floor, you may wonder what will happen next. Knowing what to expect before, during, and after the work takes place will help ensure a high-quality job.
Before work begins, remove all furnishings, draperies, paintings, and other items from the room. For new installations, the wood will need to acclimate, which will vary from two days to two weeks or even longer depending on the species.