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Lets see if I can describe my situation. I have reframed the roof of a doghouse dormer. A large rectangular chimney (with the long axis running parallel to the ridge of the main roof) bumps into one sidewall of the dormer about where the dormer valley lands on the dormer wall plate. I want to add a framed cricket behind the chimney in an effort to eliminate water being directed directly down the valley on to the corner of the chimney. Unfortunately, a traditional cricket will only send more water on to that vulnerable corner of the chimney. I would consider adding a (lower)pitch of roof from the dormer ridge back behind the chimney but don’t want to add that small section of sidewall, thus affecting the streetside view in a bad way. Any solution that shows up from the street as roof surface is acceptable. If this makes any sense, are there any suggestions?
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Replies
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Dylan, I think the easiest way to do what you want is to just move the chimney away from the valley.
Just kidding.
I think you have two options. 1. Build a shed roof off the ridge of your dormer, behind the chimney. You've probably already thought of that and disregarded it because it shows siding, not roofing, to the street. But it would work the best.
2. If you're good with copper you could try to solder up a scupper. Build a conventional cricket and use the scupper to direct water through the dormer roof overhang (eave).
I'd deal with looking at sidewall.
Mike
*How about making your doghouse wider so that the chimney is enclosed. This will put that valley to the upper outside corner of the chimney. The ridge will also move over to remain centered and the point where the dormer roof dies into the main roof will be higher. Then you cricket the dormer roof against the side of the chimney.(Works in my mind) Might look a little funny with the large chimney sticking out of the little house on the roof.
*Yeah, and if the sidewall isn't too big, you could cover it with roofing material? Less noticeable from the street.
*Are there any web sites with pictures of "difficult" flashing installations?
*Final solution: Our venerable old roofer (wears cowboy boots while roofing, makes ALL his own flashing) assures me that he can adequately flash whatever I give him. So I have simply cut long wedges of plywood running from the dormer valley down either side of the chimney. This creates a measure of drainage (1:12) while somewhat (hopefully) cutting down on the leaf collection potential. Now I just hope Mr. Roofer is right. Dylan