We are in need of replacing a flat school roof on a Gymnasium. The roof would have to be stripped, soft panels replaced, etc. Since there is no value to the "look" of the roof since it won't be seen unless your in a plane...why should we leap for EPDM at nearly twice the price of sheet seamed rubber roofing. Both are offering similar warrantees for labor and materials? (Total footage is about 6000 feet) Should we consider cutting into the roof to add two exhaust fans? Or are they a disaster waiting to happen? I haven't found a compelling argument for the jump in installed price?