Reply by jtrz

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Posted on Fixing Bow in MDF

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166 posts in 1593 days

#1 posted 09-19-2018 04:20 PM

Sorry for the delay in getting back on here.

My mistake was gluing it instead of just screwing it.

No your mistake was not keeping it flat while it was glued. Nothing wrong with gluing it.

If your going to use the top for a bench I would assume that the bench is going to have some kind of frame work that you would be able to attach your top to and be able to take out the bow when you attach it.

I would keep it and use it for your bench top.
(Also depends on how bowed it is, but 1/4” dip should pull out easily enough)

- jbay

Of course, not keeping it flat was the major mistake but I just didn’t have a large enough flat surface to use.
It was supposed to be the top of a roiling workbench or possibly a bench top tool cart that would have a frame.

However, that was a while ago and since then I have stopped using any power tools that are especially loud and ones that create a lot of dust because I don’t want to piss off my buddy who owns and lives in the house I am living in. So, no jointer, no router and no table saw. I really only use a circular saw, miter saw, and jigsaw inside. So I have started learning more traditional techniques to keep the noise down. Now I would like this to be the top of a small woodworking bench that I can put dog holes in and attach a vise too.

I checked the status of the MDF last night and it isn’t as bad as it used to be. Along its 4 ft length it has maybe a 1/4” dip and along the 2 ft width there is a very slight concave bow. So small that I would need to break out my feeler gauge to get a measurement. So a level frame could definitely take it out. I was thinking that a simple torsion type frame with 3 or 4 2×4’s running along the entire length and then a row or two of 2×4’s between them to create a grid. But even that might be over kill.

Could I get away with using 2×4’s that haven’t been jointed and planed for the frame? Without my table saw it will be hard to get nice straight plywood members for the frame and without my jointer getting the 2×4’s squared up will be difficult. My hand planing skills are fairly limited when it comes to truing stock.

Any suggestions on the frame or anything else would be super appreciated. Thanks

-- Jeff | Louisville, Ky

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