Today’s roof leak investigation took us into Vancouver for a look on a torch on roof. As soon as I saw the perimeter edge detail I felt it was going to be the issue. They commonly are. In fact, this detail known as a gravel stop detail, has been removed from the “accepted practices list” at the RCABC. I guess the metal detail has failed so often through the ages that it had to be eliminated…. and I agree. In this case I was able to insert my entire roofer’s knife into the breach. We now use a drip edge detail for membrane termination into a gutter and the metal flashing has to be waterproofed itself, prior to the torch application of the granular cap sheet. They didn’t use that specification 10 years ago and now I’m kept busy because of it. As in all roof leak finds; the fix is always easier then the find. This one was pretty obvious though.