The great variaty in moisture content in wood means that each species requires either less or more time to dry down to the desired moisture content. When air drying the aim is to dry to a 25-percent moisture content. Then, they're ready for the kiln where they'll be reduced to about ten percent.
Without a kiln (oven), the least achievement would be an air-dry moisture content of 15-20 percent. Further moisture reduction occurs when the wood is moved to either indoors or outdoors with a proper cover where they'll eventually reach their equilibrium moisture content (EMC). (Note: The EMC equals a point where the wood neither takes on nor loses moisture due to the atmosphere.)
According to the U.S. Forest Service's Forest Products Laboratory in Madison, Wisconsin, it takes 1"-thick green boards from 45-60 days to air dry to 15-20 percent moisture content in sunny, temperate, not-too-humid weather. Bali has an optimal environment to air dry wood, however, the drying process can prove slower, taking three or four months before the wood reaches its EMC and can be worked. Achieving workable stock means starting with a proper stack.
|Improper way to air dry||Proper way to air dry|