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Old 07-31-2020, 10:28 PM   #1
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Roof Valleys rotting the trim


Is there anyway to channel water away from the trim when a roof valley terminates up on the roof? I have a box split level in MN with an attached garage. So imagine 2 boxes jammed together with roof peaks perpendicular to each other with overlapping roofs. Where the roof valleys terminate up high on the roof, the trim is rotting from the water dropping on the roof and splashing up onto the wood trim. The roof valley is the typical 24” valleys I see at the home improvement stores. It’s kind of hard to explain without pictures.
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Old 07-31-2020, 10:32 PM   #2
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Re: Roof Valleys rotting the trim


Typically you would have a gutter on each eve, a deflector at the end of the valley and a downspout or two to control where the water flows.
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Old 07-31-2020, 11:04 PM   #3
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Re: Roof Valleys rotting the trim


Here are some pictures. There is no way to get a gutter all the way back, and I can't figure out how to get a rain diverter to capture the water coming down.
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Roof Valleys rotting the trim-roof-picture-1.jpg   Roof Valleys rotting the trim-roof-picture-2.jpg   Roof Valleys rotting the trim-roof-picture-3.jpg  
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Old 07-31-2020, 11:32 PM   #4
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Re: Roof Valleys rotting the trim


Cut the shingles and install step flashing under the shingles, cover them with metal flashing tucked under the upper roofing.
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Old 07-31-2020, 11:42 PM   #5
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Re: Roof Valleys rotting the trim


I'm impressed with your drawing on MY pic. I like that idea a lot. And I have all those parts right now too. I'd be interested if anyone else has any ideas, but Nealtw has a good one.
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Old 08-01-2020, 02:56 AM   #6
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Re: Roof Valleys rotting the trim


Quote:
Originally Posted by DanWDC View Post
I'm impressed with your drawing on MY pic. I like that idea a lot. And I have all those parts right now too. I'd be interested if anyone else has any ideas, but Nealtw has a good one.
Wrap the trim in alum. coil stock and never have to worry about painting it again (after installing the flashing)
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