I’m working on a house with 9-in-12 roof. Two planes of this roof intersect in a valley that’s about 35 feet long. In heavy rains, that valley runs VERY heavily, and the water doesn’t even touch the gutter as it shoots off the roof. And even if it hit the gutter, there’s no way that the gutter could handle the volume.
Is there a common solution to this problem? the H.O. would like it fixed.
The solutions that I’ve thought of are:
1. Some sort of catch basin at roof level to catch this storm surge, and then dump it more slowly into a 3″ x 4″ downspout. I fear that the catch basin will fill with leaves and stuff within a few weeks, and become useless.
2. A catch basin on the ground where this waterfall hits the ground. Say a stock tank with a metal grating cover. There’s a place where the tank could drain to.
3 Other ideas???
Thanks
Bob
Replies
Rivet a higher lip on the inside corner or make a custom section of gutter at a 45 to the other two to form an interior triangle.
If the whole gutter run is undersized or the drops too small, thats another kettle of fish.
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I use a 6 inch gutter to handle the volume. Plus in my valley I have a defector that stops those torential rainfalls from overflowing the gutter..
It is a nice looking cast brass one but since the gutters are copper it really looks handsome. They do make and sell plastic and aluminum ones though so you shouldn't be left out..
If a barrel is your solution for the over run, dig down either to the watertable or as deep as possible. Fill the hole with large chunk gravel and set a bottomless barrel on top of that. The water will soak into the ground and since it's rain water be harmless to the water table..
Thanks, guys, for your insight.
Bob
What Sphere said, but be advised that if you live in an area with lots of snow & ice, the lip will likely get torn off in the Winter. I've got the same problem you describe, and I've had to live with it as is.
Fortunately the problem is limited to very heavy rain, which only happens a few times of the year. The rest of the time the gutter makes the catch.
Scott.