Personally, I think the EPDM roofs last quite a while. Unless they are torn or never cleaned properly, they will last 10 years at least. Where you WILL get leaks is around the skylights, vents, vent stacks etc. The caulking/ sealing around these areas WILL crack and leak and need to be recaulked every year or at least carefully inspected. I will normally find one or two areas that need to be cleaned and recaulked upon each inspection. Make sure you use the correct type of sealant.
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