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Shoutout to the guy who told me to always seal the underside of a tabletop

I skipped that step on a big walnut slab last year, and the whole thing warped like a potato chip after the first humid week. He said it stops moisture from moving through the wood unevenly. Do you guys seal the hidden parts on every piece, or just when you think it's needed?
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joseph_torres
joseph_torres4d agoTop Commenter
My oak desk warped last summer and taught me that lesson.
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wilson.kelly
Oh man, that's the worst. My buddy had this beautiful old table he refinished himself, left it near a window for one sunny week... totally buckled in the middle. He was crushed. It's crazy how fast it can happen, @joseph_torres. Makes you really respect what humidity and heat can do. He ended up having to take the whole thing apart to try and fix it. Just a total pain.
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