We installed white oak planks 2 years ago and they are still moving. The floor is Amish built-28 yr veteran. Kiln dried and delivered at 6% moisture content. I have a humidistat that I've tracked it upstairs and down. The humidity in the house is 40-50% summer and 35-45% winter. I can't figure out why this is happening when this is industry rated humidity for a house. It's nailed down over rosin paper. Only the unfinished storage is not closed off.