It usually happens after water is left standing on the wood or if the floor s exposed to high humidity over a long span.
Crowning floor due humidty.
It most often occurs when a floor has been sanded too soon after cupping.
But dust mites can t exist in humidity below 50.
Like cupping and buckling crowning is a defect a wood floor can develop when exposed to moisture.
Crowning is the opposite of cupping.
The middle of the board is higher than the board s edges.
Cupping occurs when the edges of a wood plank become higher than its center.
This can occur when the surface of the floor encounters moisture.
This creates a concave u shape in the board.
An example of cracking in hardwood floor due to high relative humidity.
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 like buckling and peaking occurs when a floorboard is higher in the center than it is on the edges.
Unfortunately it s also possible to cause crowning in an attempt to fix cupping.
In terms of your flooring excessive relative humidity can cause several issues.