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gtzpower 05-10-2014 09:04 PM

How to shingle a roof with a change in slope?
Hi there. I am sure the answer is out there, and I would search more for it, but I am not sure what terminology will find what I am looking for. :(

Anyway, I am replacing the roof on my shed, and the roof goes from a relatively level slope in the middle to a steep slope on the edges. Before, the roof was 3 tab shingles that happened to bend over the change right in the middle of the shingle. I don't know if they glued it down or what. But I am now putting on architectural shingles, and the area that bends in about 2" long. I have put roofing cement under the lip and nailed it like a mad man. I suspect I will be tearing that out and redoing it. Does anyone have suggestions on how I should handle this?

I have pictures but this site won't let me include them because I don't have 5 posts yet. Even the IMG tags say i cannot post links until I have 5 posts :huh:

gtzpower 05-10-2014 09:07 PM

Sorry I cannot link or embed these, so you will have to copy/paste to see them.

AndyWRS 05-10-2014 09:45 PM

You need a metal transition flashing between the two roof sections on a gambrel roof. That link shows a few different options. They are typically bent to match the roof pitch.

gtzpower 05-10-2014 09:54 PM

Hey Thanks! "Gambrel flashing" gave me something to search for and now I see exactly what I should be doing here. Thank you so much! :)

AndyWRS 05-10-2014 09:56 PM


joecaption 05-11-2014 08:03 AM

Make sure you follow the nailing instructions to a tee.
If there nailed to high on that style roof the layers of shingle come unglued and slide down the roof.
I roof it as if it was two roofs not one, if you lay it out right you can run the shingles up that steep side and have the nail line come out at the change in pitch. Put a dab of roofing tar on the exposed nail heads.
Then install aluminum drip edging, tar paper, starter strip then run the shingles.

tinner666 05-12-2014 05:43 AM

Joe is right. Treat is as two different roofs. No need to glue anything down. Use starter strips on the upper roof too! Let it overhang the lower roof by 1-2" the same way you did at the bottom and you'll be fine.

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