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cbdiy 09-24-2012 04:19 PM

rain diverter install
I want to use a J channel rain diverter under the shingles on my patio roof. How do I avoid moisture under the shingles when/if we have snow? Have seen this done but they didn't address this issue on the video. Perhaps it is a non issue and I am just over thinking this.

joecaption 09-24-2012 08:57 PM

I hope your not thinking about using a piece of vinyl J moulding for this?
Where the deverter gets nailed to the roof it needs to be at least 3" up under the edge of the shingle.
A simple L shaped piece of coil stock is the simplest way to do it.
I do a 1/2 seam, then make the next bend at 1" and cut it off at 3 or 4".
The seam adds strength to the raised area.

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