Would you use pressure treated for framing?
I'm building a fair size cupola to go atop my garage. It will basically be a large dog house shape. I plan to frame it like a little house, sheath it with plywood and cedar shingles and put a three tab shingle roof on it. I'm debating whether to frame the whole thing with treated lumber, or just the parts that rest on the roof. The problem I see with using treated lumber for framing is getting pieces that are straight enough and/or will stay straight. Any advice?