News — why do wooden cutting boards warp

If your wooden cutting board has started to bow by 2 to 5 mm, it’s almost always because one side has absorbed more water or heat than the other. Wood swells as its moisture content rises above about 12 percent, then shrinks again as it dries, which creates tension that pulls the board out of shape. Why do wooden cutting boards warp in the first place? Wood is a natural material that is constantly reacting to its environment. When one face of a board gets wetter, hotter or dries more quickly than the other, it expands or contracts at a...