Flattening 1/4" Plywood

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Forum topic by interpim posted 03-22-2009 06:32 AM 1414 views 0 times favorited 3 replies Add to Favorites Watch
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1158 posts in 2877 days

03-22-2009 06:32 AM

Topic tags/keywords: question plywood

I have some 1/4” Oak Plywood, which has a slight bow to it. The panels I cut from it are fairly small (13” x 18”) and still retain this bow.

I have the panels raised from each end by a couple of 2” boards, and put another board in the center and added weight. Will this flatten the plywood back out? or should I try something else to get it flat?

-- San Diego, CA

3 replies so far

View Karson's profile


35032 posts in 3819 days

#1 posted 03-22-2009 06:38 AM

What is the ply going to be used as. Is there any other wood that can hold it flat?

-- I've been blessed with a father who liked to tinker in wood, and a wife who lets me tinker in wood. Southern Delaware soon moving to Virginia †

View PurpLev's profile


8523 posts in 3067 days

#2 posted 03-22-2009 06:44 AM

usually 1/4” ply is used as a backer board, or a drawer bottom where it is held/fastened to a square frame which keeps it flat. 1/4” ply on it’s own will hardly stay flat.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

View DaleM's profile


952 posts in 2803 days

#3 posted 03-22-2009 12:52 PM

I just had the same problem and it seemed that bending alone wasn’t taking the warp out. I sprayed it down with water on both sides, enough to penetrate a little, then weighted it down for awhile until it dried. It worked, sort of. It retained a slight bow in the other direction when it dried. I guess I had curved it too much, or wet it too much but it looks like it will work with some trial and error while I figure it out.

-- Dale Manning, Carthage, NY

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