Brian Gray
Posts: 339
Joined: 2004-01-21
Location: Sandusky, OH
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The first question would be did you use a backer veneer?
If not, that's the first thing to try. You want all conditions to be as identical as possible from one side to the other side...thickness of veneers, amount of glue, etc...
The next thing that I would do is to check out your shop humidity. Measure what the relative humidity is in your house, and then mimic that in your shop. Then let your materials settle in these conditions for a while before building. Did the panel warp right out of the press, or did it change after going to a new environment?
These are a couple of strategies, but the bottom line is that 1/8" MDF might be too thin when you are talking about panels that are that big. Even if you do everything that I mentioned above, humidity levels change seasonally, and might mess things up with a panel that thin and big.
It might just be a process where you have to build 4-5 of them to come up with 2 that don't warp.
If that fails, you might need to go with a thicker substrate.
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