This issue can either come from a moisture issue that is affecting the center of the planks or from sanding a floor that was cupped and still had moisture issues.
Crowning floor due humidty.
Cupping occurs when the edges of a wood plank become higher than its center.
If the floorboards absorb humidity from the air or moisture from the subfloor they can swell and.
The middle of the board is higher than the board s edges.
It most often occurs when a floor has been sanded too soon after cupping.
Like cupping and buckling crowning is a defect a wood floor can develop when exposed to moisture.
Crowning is the opposite of cupping.
Unfortunately it s also possible to cause crowning in an attempt to fix cupping.
An example of cracking in hardwood floor due to high relative humidity.
This creates a concave u shape in the board.
Crowning is typically a problem that is a direct result of cupping.
It usually happens after water is left standing on the wood or if the floor s exposed to high humidity over a long span.
This can occur when the surface of the floor encounters moisture.
But dust mites can t exist in humidity below 50.