Hi, everybody! Long time lurker, first time poster! [:-paperba I'm trying to identify the material on a flat roof over an 11-story apartment building in Iowa City, IA. The building was constructed in 1980 with $35K worth of roof repairs in 1991. I write capital needs assessments for an architectural firm in SW Missouri but have a background in English so . . . I'm kind of lost as to what this is. I'm used to seeing built-up, EPDM, stuff like that on flat roofs. I've never seen a tile like this before on a roof. Unfortunately, the "inspector" (I use the term loosely) has no clue about different building systems so his data is completely useless especially since he calls this a membrane roof. Please take a look at the attached photos. If you have some information on this material, I'd appreciate any help you can give! For example, what is it called (generic name rather than a brand name), benefits of using this in Iowa, expected useful life of this stuff, any sort of known problems, and anything else that might be useful. Thanks! Download Attachment: roof 1.jpg 70.95 KB Download Attachment: roof 2.jpg 89.62 KB