regular popups will leak, if they are not looked after. Regular caulking maintenance is a requirement for the roofs of these trailers ... and maintenance of the lift systems also. the reason i purchased my Aframe was to get away from inferior lift systems and leaking. there are a number of products out there now .. that fix leaks and seal, without the use of Dicor or caulking.
hey .. im not saying they should leak .. but fixing the problem is relatively very easy, and should last the lifetime of the trailer .
2008 Nissan Frontier 4x4
2011 Rockwood A122