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Would you like to add information to this article? Interested in writing or submitting an article? Have a question about this article? Causes for warpage after planing Question
Forum Responses
Maybe the wood wasn’t dried thoroughly. Cut a wood block 1.5" x 1.5" and weight it on a scale. Dry it for 24 hours. Weigh it again. Then use the equation MC= (MassWet-MassDry)/MassDry * 100. This will give you the moisture content. The cause is drying stress (casehardening), which should be relieved in the kiln by a process called conditioning. Sometimes the process is not done correctly or at all. You can check for stress by cutting a clothespin-shaped sample from the lumber--many texts illustrate how to do this. Wood with drying stress should be returned to the seller. If it were a moisture problem, then you would see warp developing after jointing and before planing. Gene Wengert, forum technical advisor Have you reviewed the related Knowledge Base areas below? 
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