Originally Posted by rsimpson
What you are seeing in the second picture is pretty much standard in the industry as to how a front cap is joined and sealed from the factories. For EPDM (rubber) roofs, that caulking needs to be cleaned and inspected at least yearly. You can clean it with mineral spirits (try not to get too much on the roof membrane itself) then overlap any bad spots in the caulking with Dicor where needed (no need to remove the old caulking). A small pin-hole can create HUGE problems! On my fiver, I cleaned this area and applied a 6" piece of EternaBond the entire length of the seam, then sealed the edges of the tape with a small amount of Dicor just for good measure.
As for re-sealing the ENTIRE roof on a regular basis...I've never heard of that and I've had two 5ers with no leaks while performing routine maintenance. Gotta do it though cuz it'll get away from you before you know it.