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mtaylor

Lite Ply Warping

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I have some "Lite Ply" that's been sitting in the workshop for about a year.  The A/C or heat has been on and windows closed (allergies).  Yet it's warped a bit.  Is there anyway to prevent it from warping?  It's 1/8" thick, 3-ply. My concern is that I have more on the way for my new build and if it's going to warp, that's a real problem.

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It always happens to me too.  I keep a heavy flat weight on it.  Several large heavy stones.  This helps but there is still warping at times.

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May be had it wet with water and put under flat press as was suggested above? Let is it slowly dry under the press.

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If you wet it...only wet one side.  I forgot which side you are supposed to add water to.  Then flatten and leave in the sun.

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All I know is, it's easier to prevent warping than to correct warping. Storing it on a flat surface with a flat weight on top has kept it flat for me. Without it, it warps.

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Thanks for insight everyone.   I'm testing on my available stock while waiting for my order from National Balsa.   Seems that the smaller cut pieces don't warp like sheets. By smaller, I'm looking 12" X 12" whereas my 24"X24" did warp.  Both were stored in the same place.  When the fresh comes in, I'll keep it flat for few days on the dining room table and then cut it down to manageable sizes.

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Maybe you could use flat concrete pavers from HD. I would use stickers,small wooden strips , between the concrete and the ply though.

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