Guess what happened to my roof after rains?. It floods. I really don't know what to do. I have a flat roof and it is causing water stagnation. It has started to leak also. I found this blog while searching for a fix http://www.empireroofingcorporation.com/what-happens-if-rain-season-causes-your-roof-to-flood/ . I need to do something urgently to fix the problem. Any tips?. Should I replace the roof entirely?