Varation in a sheet of Playwood's thickness - Woodworking Talk - Woodworkers Forum
 
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post #1 of 7 Old 03-06-2017, 09:22 AM Thread Starter
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Varation in a sheet of Playwood's thickness

I purchased some 19/32 plywood over the weekend and after processing the sheets down I found a gradual decrease in thickness slightly over an 1/8 at one end of the boards. The board doesn't show signs of water staining. and the area is not swollen it is smaller than the board's stated thickness in this area. What would cause this to happen? Is it an external influence or a manufacturing defect?
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post #2 of 7 Old 03-06-2017, 11:16 AM
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Originally Posted by Kitch502 View Post
I purchased some 19/32 plywood over the weekend and after processing the sheets down I found a gradual decrease in thickness slightly over an 1/8 at one end of the boards. The board doesn't show signs of water staining. and the area is not swollen it is smaller than the board's stated thickness in this area. What would cause this to happen? Is it an external influence or a manufacturing defect?
It is nothing you have done, just pi$$ poor plywood, and it is everywhere
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post #3 of 7 Old 03-06-2017, 05:27 PM
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Where did you purchase the ply? The dealer I buy from warrants it for thickness. A 1/8" variation would have not been sold. At least as cabinet grade wood. It would have ended up on the seconds pile.

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post #4 of 7 Old 03-06-2017, 09:17 PM
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Gees, in 45 years I've never seen one that bad. When you said a variation in thickness I was expecting 1/32". If the sheet you have is that far off I would expect some other problem too so I wouldn't use it at all.
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post #5 of 7 Old 03-07-2017, 10:27 PM Thread Starter
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One of the big box stores of course. I needed a few sheets late on the weekend. Good to know it's not a common thing. I have never come across something this bad before but sounds like a freak thing.
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post #6 of 7 Old 03-08-2017, 02:50 PM
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After I reread the OP I too haven't seen one that bad, I was thinking 1/32 +/- also
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post #7 of 7 Old 03-08-2017, 03:39 PM
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Look at the end grain where you can see the thickness of each layer of veneer.
1. In the middle? Something went wrong at the lathe log peeler.
2. Surface? Springs in the sheet sander broke somehow.

Inspection should have caught that. There's enough mirrors to see every part of each sheet.
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