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what is the best way to avoid warping on a sheet of plywood? should it be layed flat or leaned up against a wall?

if i cut part of the plywood now and then come back to the sheet later to continue will i run into warping? i have a feeling that i won't be able to finish my project in a days time let a lone 2 but i wanna make sure that im not going to come back to a ruined peice of wood due to warping.

shawn
 

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Lean against a wall an let no sunshine hit it.
 

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reds_21 said:
what is the best way to avoid warping on a sheet of plywood? should it be layed flat or leaned up against a wall?

if i cut part of the plywood now and then come back to the sheet later to continue will i run into warping? i have a feeling that i won't be able to finish my project in a days time let a lone 2 but i wanna make sure that im not going to come back to a ruined peice of wood due to warping.

shawn
Hello Shawn,

I have a rolling wood rack that I lean and stack my plywood on before and after cutting to size. A majority of the time I will lay out a project on a sheet and cut it to rough size then finish cutting on my table saw. Then I will stand it up in the rack so it will get air and no moisture from the concrete floor.

Before I had my wood rack I would stack the plywood against the wall on 3 or 4 2x4's to keep them off of the floor. Here in Southeast Louisiana we some times get sweating or moisture on the Concrete floors especially in the winter time.

Here's a pic of my wood rack in the back ground.
 

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I think the best way to avoid warpage of the plywood for this project is to cut all your pieces to rough deminisions in one day. That way you will have smaller pieces that are less likely to be susceptible to warpage due to it's own weight, then like Randy said, keep it from direct contact with concrete.
 

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reible said:
Hi,

I can see we differ in our thoughts for storage and to be honest I end up keeping it one edge because I don't have the room to do it other wise but........

Check this out:
http://www.cwc.ca/products/plywood/moisture.php

Ed
Hello Ed,

I do agree but most of us are 1 man hobbyist and only work out of our garage/shops and do not have the space to lay our plywood flat for storage. So the next best thing is on Edge off the floor. I wish I had the room to store wood the way it needs to be stored especially this expensive Red Oak Plywood I have had for a little over a year. So far no warpage. :)
 
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