I have a few planks of old oak that has warped over the years...very weathered. I'm sure I could plane them, but lose half their size in the process. Is there a way to take the warp out of the wood before planing? Regards, Dan
Sometimes a cup warp can be corrected if the warp was caused by short term improper storage where moisture has gotten to one side and not the other by wetting the cup side. If you have some that has sit for years and warped I think the only solution is flattening on a jointer and surfacing.
Let it sit for a while in a protected area off the ground so air can circulate around all sides. This is so moisture content can stabilize throughout the piece. This may take a few weeks for 1x stock, longer if thicker.
If after this the piece is still warped, I agree, that's the way it wants to be and there isn't much you can do about it.
If you do decide to plane it, wait until it is stabilized.
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