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Old 06-14-2013, 05:09 PM   #3
Blake Barnes
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Stacking several pieces of plywood on top of each other and screwing them together help prevent the possibility of the wood warping or creating any type of "bubbles".

As far as dropping one piece of ply in your matted floor, you definitely need to make sure the concrete below it is good quality. I also believe that way will have a greater chance of the wood warping, especially if your area's weather fluctuates a lot along with the humidity.

The best way to go is just to lay out a couple stacks of plywood to keep the platform flat and solid.
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