Hi!
Ok I have a couple of laminated maple panels, 12″ wide, they are cupped. Now they were laminated a while ago. recently I worked on them so they changed from standing up to lying flat on my bench for 2 weeks. I have seen a panel before that cupped over time then became flat again. Me thinks there 2 possibilities, obviously natural tendency of the wood, tensions released after planing, it cups. Second one, humidity level changes in the shop, etc. depending on how the wood is stored one side will absorb moisture more than the other. So the question, anyone ever verified moisture content ( with meter) on both sides?? Ever seen a difference????
For example someone mentionned boards lying flat on grass, for a day,they tend to cup, absorb moisture on the bottom, the top dries from the sun. So the moisture content most be different on both sides.
Thanx
Replies
Bbber ,
I really don't think anything is wrong with the wood ,
The panel without it's frame has the structural integrity of a piece of wood .
Imo the panels would not have cupped in the frame , therefore the lesson we all have learned , don't leave panels lay .
Even with the best devices for detecting moisture this same scenario occurs
dusty
"So the question, anyone ever verified moisture content ( with meter) on both sides?? Ever seen a difference????" Is this a purely hypothetical question? When one sees the results of laying a board in the grass on a sunny day, there's really no need for a moisture meter reading to confirm what's happening in the wood.
BTW, the prescrption is to lay the board on the grass (or a damp towel, whatever) until it flattens or goes just barely past flat to very slightly cup in the other direction. If one were to leave it there all day, complications could occur. ;-)
forestgirl -- you can take the girl out of the forest, but you can't take the forest out of the girl ;-)
Edited 11/13/2007 5:48 pm by forestgirl
"So the question, anyone ever verified moisture content ( with meter) on both sides??"
I haven't tried a moisture meter (it would be hard to get a reading that was just of the surface, at any rate), but I've taken a glued-up panel that was lying flat on a table top, and had cupped, and set it so that air could circulate on both sides, and it flattened right out.
-Steve
I once glued-up a table top before the leg assembly was completed. A week or so later I was shocked to see a large cup in the top. I turned it over, placed it on thick stickers and soon it was flat again.
Now I glue-up the top AFTER the support assembly is ready for installation.
Frosty
"I sometimes think we consider the good fortune of the early bird and overlook the bad fortune of the early worm." FDR - 1922
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