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Kiln dried lumber is lumber that has been heated in a kiln so that it has a low moisture content. View slideshow of images above.or some applications, lumber that has been kiln dried can be used just as it is. In other instances, it may be necessary for the lumber to acclimate for one to two weeks, and the wood may pick up some additional moisture during this time.
The dimensions given are only a suggestion; build a kiln to suit your drying needs. A kiln constructed to these specifications (Figure 1) will dry 450 board feet of one-inch-thick hardwood lumber in 6 weeks or less of good weather, or 600 board feet of two-inch hardwood lumber in 15 weeks. Softwoods will typically take half the time of hardwoods.