joot city building code says you can have 2 builted up roofs or 3 shingle roofs. this is one layer of a built you have roof here, you could have 2 of these roofs you would have to remove one or both before you put the next flat roof on. if you had a shingle roof you could have 2 and put a third one on. i don't know if it would be a good idea. >> it's legal under the building code. >> if you notice on the bottom of that sample that was installed over a gravel roof. see, how the gravel from the roof under is wearing into that roof. that's why i never recommend going another roof over gravel. i recommend being torn off. fine over smooth but not gravel. what should this lady do about her roof. >> find somebody that knows what they are doing and have them core the roof. find out what is this there. how many roofs are on there. they can repair it on site. it shouldn't leak. once they have done that you can ask them, give me some specifications. tell me what kind of roof you recommend to put on this roof. they should be able to tell you a couple. they may talk to you abo