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Reply by jonah

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Posted on Help choosing plywood for table tops - warping?

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jonah

2075 posts in 3780 days


#1 posted 07-16-2018 03:25 AM

If I’m understanding you, the tables will be 22.5” square?

The thing with gluing plywood together for thickness is that once the water in the glue gets into the wood, it swells and warps, and with two pieces trying to move, things get uneven in a hurry.

The solution is a lot of very even clamping pressure and the right amount of glue. Many people use a vacuum press for something like this, just like they would with veneer. There are a few ways to make your own vacuum press, but I’ve never done it so I can’t speak to that.

If a press isn’t an option, make sure you use very beefy, very straight cauls and a lot of clamping pressure spread out over the whole top.

An alternative would be to make the tops out of solid wood. That would be a little more work, but it’d be easier to flatten if it did end up warping since you could just take a hand plane to it.


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