Messages

Subject:
you should have bought a fan

Bill Tindall, E.Tn.
Wood contains water in three "places". There is liquid water in the vessels. You don't need environmental modification to get this water out. In fact you don't want to remove this water faster than it can diffuse and wick to the surface. Good air circulation is helpful to prevent staining. Large operations either stack lumber outside for this step or inside "leaky structures with fans.

There is water in the cells. A lot of this water will come out just by bathing the wood in ambient air. When this water comes out the cells shrink and the lumber shrinks. It is at this step where warp, check and all the bad things happen. Kiln operations highly control moisture loss at this stage. Hasten this step and bad things are worsened.

Finally there is water bound to the lignin and cellulose. You need to have low humidity to remove this water, achieved either by heating the air or dehumidifying. It will be a while before you get to this step.

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