Reply to "1/2” or 3/4” plywood"

Richie C.OGR Forum Member SUPPORTING MEMBER

Not sure where all this concern over bending, warping and painting of plywood sheathing is coming from.

I laid 15/32" medium grade unpainted plywood over a frame of 2X4 outside framing and 1X4 interior bracing 16" on center. The plywood was attached hump side facing the ceiling, first with construction adhesive on the framing and then with drywall screws every 8" starting in the center and working out towards the ends (about 50 screws). That plywood is not moving a nanometer.

1" rigid foam was then glued over the plywood with more construction adhesive and weights (books, tools, lumber, etc.) added on top until dry.

All this in a northeast basement.

12/7/225:36 PM

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