01:38PM | 04/09/03
Member Since: 10/15/02
359 lifetime posts
What is the drop per foot on a gutter for proper drainage?

Also what can I do to prevent or at least slow down the deluge of water that comes off the valleys from my roof? When it pours out, the water meeting at the valley flows so fast it goes right over the gutters. The gutter have the leaf shields on them in case that makes any difference.


01:10PM | 04/11/03
Member Since: 10/15/02
359 lifetime posts


11:15PM | 04/13/03
Member Since: 01/03/03
97 lifetime posts
there is usually a deflector plate at the end of a valley to prevent that, go to a home depot or any retail builder store and they should have them


05:53AM | 04/15/03
Member Since: 01/14/03
264 lifetime posts
I'm not sure there is a rule of thumb as to proper slope per foot of gutter. As long as the gutter slopes downhill, the water will find it's way. The steeper the gutter slopes, the more velocity the water will have, and the more likely it is to wash the debris in the gutter down to the downspout end. That can be good, it can be bad. if the downspout outlet is large enough to handle the debris (leaves, etc) and has no screen over it, most things will wash out. If the downspout outlet has a screen over it, the debris will all build up at one end of the gutter, and, of course, the water will end up just spilling out.

Depending on where the gutter is, a good thing to remember is how it will look once installed. Many times people will install gutters that slope more steeply than they need to, and the appearance of the gutter, as seen from the ground, as it slopes along the soffit fascia board can be less than desireable. It will really catch the eye.


07:36AM | 04/29/03
Member Since: 10/15/02
359 lifetime posts
Thanks, when they installed the seamless gutters on my house I dont think they pitched them properly, 3 of the 6 overflow when they get close to the downspout and wind up washing away the grade by the foundation and I get water in the basement at one point and water in my garage at the other sites. We had them out and their idea of a cure was to extended the downspouts away from the house. Like that would help! I looked at one of them and it looks like it pitches up towards the downspout side, so I am looking to rehang them myself, and try to put some diffusers in the valleys as well.
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