I was thinking of using pre-finished engineered hardwood flooring on the interior side of a sandwich side wall instead of 1/4" hardwood plywood. Specifically, I was looking at flooring that is 5/16" or 3/8" thick, that has a thin pre-finished hardwood layer with the rest being "plywood." The flooring would be direct glued perpindicular to the vertical wall framing.
I do see that manufacturers of this material warn against using engineered flooring in areas of a home where there are large swings in air humidity / moisture content. This would be the case in a tear, but since an engineered flooring product is really plywood, I don't see how this would be different in using the traditional plywood as an interior skin.
Your thoughts? Thanks, Tom