Darryl Keil Last Activity 2025-09-09 11:09 AM
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Rick Warner

Posts: 6

Joined: 2008-02-07
Location: Florida

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Subject : Veneering prefinished ply
Posted : 2008-03-30 10:38 PM
Post #34460

Taking balance into consideration, is veneering the unfinished side of prefinished ply unacceptable? I have some nice prefinished maple ply and would like to use it to make some boxes for an entertainment unit. It isn't an issue except for the two end panels. I would have to veneer them to match the cherry faces. Any concerns? TIA


 
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Rick Warner

Posts: 6

Joined: 2008-02-07
Location: Florida

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Subject : RE: Veneering prefinished ply
Posted : 2008-03-31 9:46 PM
Post #34462 - In reply to #34460

Has anyone ever done this? This isn't a heirloom piece. Just an entertainment unit. Can I get 20 years out of it? The panels will be 23 x 30 1/4". I know this probably isn't "best practices", but is a panel this size going to warp and bust a simple box apart in 6 months?

Any input?


 
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Paul Kierstead

Posts: 39

Joined: 2008-01-24
Location: Ottawa, ON

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Subject : RE: Veneering prefinished ply
Posted : 2008-04-01 8:51 AM
Post #34463 - In reply to #34462

It is unusual to not get replies, I expect some people are away or the like.

In the void, I shall give *thoughts*; these are not experienced enough to be considered advice When you use an unbalanced veneer, you can get (and I have observed it when I was doing a side at a time) significant warping of the panel. I can't tell you that this definitely will happen in your case, but it would certainly seem to be a good possibility. I do know it isn't really a "down the road issue"; the warping happens pretty quickly (same day in my case). One way to get around it would be use a two ply veneer, where the backing veneer is directly attached to the face veneer.

I am curious as to the reply though; I am looking a re-doing my kitchen this summer, and prefinished plywood for one face or -- if I get desperate -- melmine (both for the interior) and custom veneer for the exterior is what I want to do, so same predicament.


 
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Darryl Keil

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Joined: 2003-05-22
Location: Maine

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Subject : RE: Veneering prefinished ply
Posted : 2008-04-01 7:48 PM
Post #34465 - In reply to #34462

Rick,

Paul's assessment is pretty much what I would say. Every time you add a glue line to one side and not the other you almost always get some level of warpage. Bigger the panel more the warpage. Just because the panel is finished on one side doesn't overcome this issue. Like Paul said, the level of warpage will show up pretty much right away. It wont bust apart your box but the panels you only veneer one side wont be flat.

Darryl


 
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Don Stephan

Posts: 825

Joined: 2003-07-18
Location: Cincinnati, Ohio

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Subject : RE: Veneering prefinished ply
Posted : 2008-04-01 8:06 PM
Post #34466 - In reply to #34465

One solution might be to make a second panel for the exposed sides. This is the approach I've seen used for kitchen cabinets - the front rail is designed to extend 3/4" beyond the cabinet side so that it also covers the end panel. Don't know if that is an option for your intended design.

Another solution would be to design a sufficiently stout carcase so that the expected-to-be-warped side panels can be pulled straight and kept so. If this approach is selected, try to make all the pieces and dry fit before veneering the side panels, so that they can be sanded, trimmed, and fitted into place as soon as they have cured overnight.


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