Best way to flash an EPDM rubber roof on a concrete roof deck?
Is the 2" diameter pipe (connected to the downspout) the only means for water to flow off the roof?

If yes, does this current system allow the roof to drain correctly? ie Does water flow off the roof in a reasonable manner or does it build up (puddling) or does it overflow else where off the roof?


  I'll then fasten the overhang to the vertical edge using a termination bar (basically a strip of aluminum with screw holes every 6" or so) along with some EPDM caulk.
  
  This use of termination bars seems like it should be really reliable, but possibly overkill -- they're designed to help seal the EPDM on its way up a wall, and this is down.


Also the above has me a little confused, is the EPDM being terminated via being dressed vertically up a wall or is it being bent down a wall (a photo of the existing would greatly help)?