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Question:

How can I straighten a warped sheet of plywood?

I can save about $20 if I learn an effective method.

Answer:

How To Straighten Warped Plywood
I'd just get a new one!
the effective way to warp wood is steaming,that you must expose the sheet to hot vapor,from any cooking vessel in an enclosed space,then IMMEDIATELY put load on them on a flat surface,you must prepare every thing before you start .leave it in hot dry place for 48 hr,lift the loads and use sheets,if you are not ready to use them yet,keep them under load until you get ready. try to block the steam from escape or hurt you,by covering the whole lump with a thick heavy tent cloth or similar
You can but is it going to be worth the trouble....you must slightly dampen it evenly (if exterior grade you can let it get more wet) then cover it with a tarp or plastic sheet them on a very flat cement floor pile about 10 sheets of plywood on top..or evenly spaced cinder blocks...etc. You get the picture...Wait till it dries and add a few days..Should come out nice and flat!

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