A. There are many reasons wide planks will shrink, cup, and twist. A lot depends on how the lumber grew. But the most important factor that we can control is the moisture content of the planks.
The floor boards will shrink if their moisture content was high at installation. After the house has been occupied for a heating season, the boards will dry and contract. In most houses in cold climates, the final moisture content of wood is 9% to 11%. If the moisture content at installation is more than 13%, significant shrinkage is likely. In...
to read the full article.