Hi, I just purchased a house and I am in the process of renovating it. I am starting with the Roof. The home is an old Brownstone (commonly known as a rowhome located in South Philadelphia, PA.)with a old Asphalt roof with a hole in it. I would like to replace it with a Rubber roof. I am having a hard time finding any information relating to do it your self flat roofing. Can you help?