I'm building drawers for my kitchen cabinets and I have a quick question about sizing the bottoms. I know when constructing raised panels it is advisable to allow for movement and undersize the width and height of the panel a bit and let if float in the rails and stiles. But what about the drawer bottom? Sides and bottom are plywood so I don't expect any significant movement but do I still need to let the bottom float at all? I've read accounts that some people actually glue their bottoms into the dado of the sides, fronts and rears. What is the best method?

Details: 12mm BB sides, dadoed with slots 1/4" deep and 1/2 tall to accept 12mm BB bottoms. Bottoms recessed 1/2 up to allow use of Blum Tandem with Blumotion slides.

Thanks,

Stuart