New to this forum. Researching A-Liners and Rockford A-frames. I would prefer an A-frame on the larger size so that I could have a queen size bed permanently made up and a toilet. Dormers seem like they add a lot of interior space. I saw some at a small-RV show last weekend and liked them. The little extra setup of hard-sided dormers seems straightforward and easy. I worry about leaks though, especially at the top because it looks like a flat roof with a dam at the hinge point. It is hard to imagine them not leaking. Am I wrong? Any reason apart from cost/weight to avoid dormers? Thanks.