Replies

1. 
   MarkCadioli | Mar 01, 2003 02:22am | #1

   In a word, No.

   However, you may try waterproofing the exterior brick in addition to flashing the intersection, but at the end of the day, the way to do the job properly is to install a dampcourse and weephole line above the new roof line.

   regards

   mark

   Quittintime

1. 
   JohnC | Mar 03, 2003 04:29pm | #2

   Thanks, Mark.  as a code enforcer, I fully agree that flashing & weepholes above the intersection is the proper detail.  Unfortunately, its much easier to draw than to do.  I suspect the incidence of this detail being done right is very low.  I wonder if any fine homebuilders out there have a technique that is practical, economical and looks good (not to mention code compliant;-) )

2. 
   MarkH128 | Mar 03, 2003 05:42pm | #3

   Here is a little article on the correct procedure. This would be darn near impossible on an existing wall though. I believe that most builders just use flashing and counterflashing for this intersection. My opinion is the wall is not likely to wick up more water with a new roof installed unless snow is allowed to build up higher than the flashing. Also the area under the roof would not be wicking up moisture since it (should be) dry there. So I think adding a roof should not cause any problems. But I'm not a builder, that's just my opinion.

   http://www.slcc.edu/tech/techsp/arch/courses/ARCH1210/Lecture/Siding/brickveneer/page3.html

   
   

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   Edited 3/3/2003 9:43:32 AM ET by markh128

1. 
   JohnC | Mar 04, 2003 06:17pm | #4

   Thanks, Mark.  The most common mode of moisture penetration through the brick veneer that worries me is wind driven rain.  I agree that 'wicking' would not be of as much concern.  The article you point to certainly reinforces the proper approach, but as you point out, it is in the context of new construction.  I've yet to hear from anyone with a practical technique for addressing this issue in the context of a new roof intersection with an existing masonry veneer wall.    As a construction regulator, I'm uncomfortable asking for the impractical and would like to hear from experts who agree or disagree that the new construction detail should be required in the renovation situation.

1. 
   UncleDunc | Mar 04, 2003 07:51pm | #5

   There was a discussion here back in January about adding openings to brick walls. One poster suggested using needle beams, short beams perpendicular to the wall and passing through it, to support the wall above the new opening while adding the lintel (or arch, or whatever).

   I don't know if this qualifies as practical in your book, but it certainly makes it possible to contemplate adding full dress flashing to an existing wall.

   http://forums.taunton.com/tp-breaktime/messages/?msg=26564.1