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I just moved into this house that needs a lot of work. I noticed that the upper gutters drain onto the roof of the lower gutters and I learned that this will ruin my roof. I was originally thinking to just connect the upper and the lower with a downspout (option A in the photo), but after doing some more research, I started to think maybe rerouting the downspout would be a better fix (option B in the photo). Would this look kinda bad right at the entryway, though? What are your thoughts?enter image description here

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    Pour water into gutter and see which direction it flows. From picture A choice might be best. B looks like high point of top gutter. Can you show a picture of back end? – crip659 May 5 at 0:12
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    The gutter should be sloped toward the outlet. If you move it to location B, you'll want to remove the gutter from fascia and re-attach it with the appropriate slope. – DaveM May 5 at 0:17
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    As mentioned, you have to get the correct slope before moving the gutter. However, I don't believe that leaving the gutter draining onto the lower roof will ruin it. This is done all the time. Over time it may discolor some of the roofing tiles with mineral deposits but I don't think it would cause the roof to fail. If your house needs a lot of work I suspect other home projects might be more critical to you than this one. If it's a major concern to you I would suggest you do option A. – HoneyDo May 5 at 0:40
  • How big are the gutters, also need pictures from the back yard. Really no way of answering this correctly without seeing the full layout. – DMoore May 5 at 1:28
  • Also you really need video after a big rain. I see a couple of issues but these could be easily correctable. It is hard to tell if you have some minor adjustments to make or have a huge issue dealing with heavy rains. – DMoore May 5 at 1:29
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My house has a similar situation and when I got new gutters I inquired about option A but the guy said it would actually cause issues:

  1. It's another clog point
  2. It will provide shade for moss to grow and destroy the roof way faster than excess water could ever hope to achieve

If you can re-slope the gutters for option B then go for it, I don't think it would look bad. You can always paint the downspout to camouflage it or buy a pre-colored downspout which closely matches the house.

I am willing to bet you have much more pressing matters to tend to which don't involve messing with gutters that work as designed :-)

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  • I would agree that there's nothing wrong with the downspout at option B. – FreeMan May 5 at 12:53

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