A table top left on the ground


When it adsorbs moisture from the ground and starts to cup, would the edges cup up or down? Thanks for helping me through this senior's moment. Cheers, JG
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The side toward the ground will be the damp side; wood expands when it absorbs moisture; ergo, the side toward the ground will expand more than the upper side, and the edges will cup upward.
--
Regards,
Doug Miller (alphageek at milmac dot com)
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but if you're doing this where there is insufficient moisture in the ground (like a desert area) to be absorbed by the top and cause expansion, then you need a special switch which you flip to cause the sun to heat the top and dry the top out (more) and contract - ergo, the top would cup upwards....... These switches are available at the borg's for the low cost of $19.95.
;-)
Bob S.


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If it's wet, then it expands. If it's wetted on just the bottom, then it will curve upwards.
If it's generally damp and reaches equilibrium with both sides, then oit depends on how the growth rings run. They straighten when drying and tighten when wetted.
If it's plywood or veneered, then it could do anything.
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