Wood fences can warp because of changes in moisture content that cause them to distort and not be as sturdy as they once were. When parts of a wooden fence dry faster than the others, they can shrink more quickly. The relationship between the humidity in the air and the fence’s moisture content affects a fence board warping.
Equilibrium moisture content (EMC) is when fence boards have high moisture and constantly shrink until there’s a balance with the air’s humidity. EMC can take days, weeks, and months, depending on the wood’s size, grain, coating, and air temperature. On the other hand, when the wood has a low moisture content, it absorbs moisture from its surroundings, causing it to swell until equilibrium. Here is how you can keep fence boards from warping. (more…)