On average it takes 1 year per inch of thickness to air dry. Our kiln can shorten this time after the wood cures to about 20%. Then it’s ready for the kiln to be dried to 8-12%. Hardwoods such as oak, walnut and maple take 3-4 months to air dry whereas softwoods such as redwood and fir take 3-4 weeks. Then, about 30 days in the kiln will do the rest. Related Product: Flooring Related Service: Air & Kiln Drying Related Wood: Other Local California Woods