Guest User
4/17/2013
Saw a 23 year old metal shingle roof today, but none of the plumbing vents had jack flashings - just a ton of "goop." Seems wrong, but I don't see a lot of metal roofs in my area.
Todd Miller
Isaiah Industries, Inc.
4/17/2013
Paul, with that particular type of metal roof, it is possible there is a flashing underneath the shingles that brings water back out on top of the next lower course of shingles. In that case, the goop is just a protective measure but not the full defense against water. That said, this still would not be the flashing method prescribed by the product's manufacturer which would have been Alcoa Building Products at the time, now Classic Metal Roofing,
Eric Novotny
An informed customer is the Best Customer!
4/18/2013
+1 There probably is an underpan there but I would prefer to see a proper roof boot in this case.

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