What is a flex ratio, and what does it mean in regards to the properties of a board product?
The flex ratio compares the amount that a board will bend both with the grain and against the grain. For example, a 2 to 1 flex ratio means that the board will bend twice as much with the grain compared to against the grain.
The higher the flex ratio, the more likely the board is to warp. A lower flex ratio indicates a more rigid board.