Roofing on opposite sides of overframing..

All,
Thanks for response to my earlier post about capping “W flashing” at the ridge. This is going to be diffficult to explain. I wonder what you guys do to tie in the two sides of a flat roof where the center is interupted by overframing such as my picture in the previous post. Do you just roof the two sides independantly and tie the two sides together in the last couple of courses? Do you estimate the remainder at the far right side, start there and hope they line up at the top where the two sides meet?
Thanks,
Cam
Replies
Do you just roof the two sides independantly and tie the two sides together in the last couple of courses?
Yep.
Roof
You will need to peel the existing roofing back about four or five feet so you can weave your vapor barrier and tie in the shingles. Depending on your location Ice & Water shield run up the valley is always a good idea. You can either run valley flashing or weave the shingles depending ond which grade of shingle you are using. The higher end shingles are much thicker and therefore harder to weave because they dont want to lat down in the valley. Just make sure you install your ridge on the lower roof as it ties into your rows of shingles for the upper runs.
You should snap lines off of the center of the peak to lay your shingles to. When you place your first course, measure from the peak to the top of the course. Say its 100", and your shingles have a 5" expsure. You could then snap more lines moving up the roofline in the same 5" increments, so you could have a line at 50", 40", 25", etc. If you place the shingles on the lines, then you know you are coming in at the same height.
Side by side alignment is done in a similar fashion. Lay the bottom course on one side, then measure the offset of the shingle tabs and snap a line on the other side of the intersecting roof that is divisible by the offset.
An easier way to do it is to use architectural shingles. Then the only real important thing is getting the height the same at the top of the roof intersection.
"diffficult to
"diffficult to explain"
Yup - I don't see a flat roof there and would not useshngles for a flat roof