I have never paid much attention to that. Typically in my shop which is not conditioned if I am not there, moisture levels in lumber can go up to 12%, while in most conditioned houses it can go as low as 6%.
When I build, I allow for that, rule of thumb is 1/4" for 12" width., or 1/8" shrinkage and 1/8" expansion.
Irrespective of the above, if you build a piece and move to the Gulf coast in Florida and then again move to Arizona, the piece has to survive, without cracking.
The finish won't help you, it may slow things down a bit, but not enough.
Pure mathematics is, in it's way, the poetry of logical ideas. - Albert Einstein.
Last edited by WillemJM; 02-12-2013 at 12:16 PM.