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Hello everyone, new to the site and I’m a relatively newbie to metal roofing. I’ve installed a couple of roofs on a couple free standing projects but the wife and I recently took on a sunroom project that entails joining two roofs, the existing is a shed roof with a 8:12 pitch that is about 5x20ft and the new roof is a 20x14 gable with a 4:12 that runs perpendicular to the existing and has two valleys that meet at the top of the ridge of the new roof. We’ve finally have it framed and sheathed but I’m having trouble determining how to roof this thing. As stated before the two valleys meet at the ridge and there’s literally like 4 inches of roof behind the ridge before you hit the wall of my second story house. There’s metal flashing or end wall flashing from the existing asphalt roof which i planned to remove (along with the rest of asphalt shingles). Being honest I usually YouTube something that gets me started and kinda figure out the rest, but I’ve been unable to find anything similar to my situation. I’ve seen people with more roof space behind the ridge run panels parallel to the ridge install the valleys and the run panels perpendicular to the ridge (more gable traditional). So my question is with that short of a run behind the new ridge would should I do to get this started? Should I really run 4 inches of panel to reach the ridge and valleys ( realizing I’ll have to flash the existing wall behind it). I hope this makes sense to someone, I’d be happy to send pictures for greater context. I’m super concerned about being watertight between the two roofs so I ask you for your help on this.
Thanks Rich. First of all, I'd highly encourage you to get your metal roofing supplier / manufacturer involved and solicit their input on this. Feel free though to post photos. A picture is always worth a lot of words. Or email photos to me at [email protected]
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