recessed plywood panel, cabinet construction
I'm building a kitchen banquette which has two recessed panels on the back rest (shaker styling, like this one: http://i201.photobucket.com/albums/aa77/kitchenkelly/DSC00260.jpg ), each panel is about 24" X 33" I have the option of using 1/2" or 3/4" plywood and am leaning towards 3/4" since I think it has more structural stability for this fairly large panel.
I am wondering, with either of these materials, if I can screw them into the frame from the back or is it absolutely necessary to have them floating for expansion? That is, it there really lots of expansion with a 3/4" plywood piece or can it be fastened in place? Otherwise I can fasten it with strips from the back without actually screwing into it. I know this isn't the most professional way to do it, but it's what I can do with my current equipment.
Any feedback/advice much appreciated.