flashing metal roof to brick veneer wall

Alan Batson
registered architect
12/31/2006
Hi. I freaked on my GC and roofing contractors yesterday and wanted your opinions. Just because I'm an architect I do not know how to build everything or know every new technique, so I want to keep an open mind. The condition is: A hipped standing seam metal roof attaching to the taller main body of the house at a brick veneer wall. The attaching roof is at ~ a 3 1/2 over 12 slope. The issue is: In order to install the counter flashing, the roofer cut a diagonal line 3/4" deep to match the roof slope. The line goes through mortar and brick indiscriminately. My reaction was: Outrage ! How could he cut into the (beautiful newly laid) brick ? Isn't flashing supposed to go into the mortar NOT the brick !? My questions are: Isn't step flashing the norm still ? I have driven around looking for similar conditions (and in Arlington VA there are many) and 99% are step flashed. Thing is, there are a variety of step flashing techniques. When step flashing, is it better to a) use multiple pieces and overlap them (~4") horizontally? or b) use one piece and have it follow the brick mortar lines ? or c) use one piece and cut the vertical steps back at inward sloping angles -which gives the flashing a toothed appearance . I'm guessing this is to act as a drip edge at the top and not just decorative ? Another question is - how should the metal flange turned up from the roofing pan which abuts the brick be sealed, prior to the counter flashing (ie the step flashing) being installed ? I appreciate your response(s). Again, Graphic Standards, Ching, and most reference section details show only a two-dimensional slice, and thus don't really address all the issues involved.
Todd Miller
Classic Products, Inc.
12/31/2006
My company teaches exactly what your contractor did. The flashing is then inserted into the sawcut and sealed with a quality butyl sealant. I think that this method is better looking and far, far more durable than any form of step flashing.
Guest User
8/1/2007
If you just saw cut the counter flashing(typical in Texas as well) then how do you deal with water that may get behind brick above it. I've always been a proponent of thru-wall flashing and this method doesn't provide that.
Todd Miller
Classic Products, Inc.
8/2/2007
Through-wall flashing is difficult in many retrofit situations which I what I was talking about. However, when the wall is cut, we do suggest a quality butyl rubber sealant be used where the flashing is inserted into the wall.
Find a Contractor

Get Started Today

Take the first step to increasing the value of your home with a great looking, durable, fire resistant and energy efficient metal roof. Browse our list of qualified MRA Member Roofing Contractors in your area for a free consultation and estimate.