Material for flat roof
I have a 5500 sq. ft. flat roof in Santa Fe, NM. The original roofing material, foam with an elastomeric paint and pea gravel, is about 10 years old and needs replacing. My 6th contractor just left. So far, each contractor has assured me that the material he was recommending was the correct one, then the next contractor would tell me the previous recommended material was not right.
I'm trying not to remove the foam if at all possible. I've looked at TPO, PVC 50 mil single ply, more foam, EZ-Cool roof system, Heat-Weld roof systems and Super Therm. My husband is totally freaked out about all the conflicting advice we are getting from these contractors, all of whom are reputable as far as I have been able to ascertain. HELP