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Foam vs plywood
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Erik, I am just starting a around the walls two level layout in my basement. I am trying to build the layout as state of the art as current layouts go. My basic construction method is going to be on 1x4 pine open grid work with all the continous falt areas (ie yards, towns etc) on top of 1 1/2 inch foam insulation board. I currently have two by sixteen feet built and up on the legs. As of now my only recomendation is that is you go with 1 1/2 inch thick as I did that you hold your cross bracing to 12 inches on center. If you decide to go with 2 inch thick material then you could go up to sixteen inches on center spacing. The reason I chose 1 1/2 inch is because this will be a double decked layout with staging under the main area of the layout. And wanted to save the half inch trying to keep the distance I have ti climb up grade down some. That would be one of the cons versus plywodd if you double deck a layout. Anyway, my construction has more than enough strength unless someone decides they need to dance on the layout. Well, if anyone has any questions or would like to see photos let me know and I will post some.
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