Where to place rain gutter?

amg1978November 2, 2010

Anyone with experience installing rain gutters please help!

I have an area of my roof which needs a rain gutter. The rest of my house has gutters everywhere. I am debating on how to install this and wanted your advice.

I can simple take a full 10' piece, put both ends on, then have a short 12" down pipe that will flow directly on to the roof. That will cascade down on to the next roof, which goes down to the gutter.

I can also take the same full 10' piece, then 1/2 way down, I can put a short elbow, then come back, attach to the stucco, then come down the wall with brackets, then have the spout pour directly in to the next rain gutter. This option will cost about another $10-12$ in parts I would guess, and also more work. But it may be the right way? Not sure...

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macv

The first option seems fine but be aware that you will increase the water flow to the lower roof gutter a bit and the run in that gutter to the downspout looks long so just be sure it's properly designed. It doesn't look as if the original designer thought much about the gutter system so check it out.

If it snows much were you live the gutters should be set low enough that a sheet of ice sliding down the roof would not contact the outer lip of the gutter.

    Bookmark   November 3, 2010 at 9:27AM
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izzie

I just put on some gutters and have a somewhat similar situation with one roof draining on to another. I was looking at how other homes configured theirs. It was about 1/2 and 1/2. The only issue is that on homes that had the 1st config. that were older (most homes have asphalt roofing here in Mn) there appeared to be more wear and tear on the shingles due to the rain running down the lower roof to reach the lower gutter. I went with option #2. But if you don't get much rain it may not be an issue.

    Bookmark   November 3, 2010 at 5:52PM
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brickeyee

I would drip it straight down from one gutter into the other.

Be sure to use some flashing to prevent splashing were the downspout empties into the gutter.

    Bookmark   November 3, 2010 at 6:08PM
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alan_s_thefirst

The first option is sometimes preferable, I have seen a tee added with a horizontal piece with several holes in it to spread out the flow of water.

Draining into the second gutter will probably look better and avoid the wear to that spot of the roof, but there is the risk of overflow.

Keep in mind, if you do the second option and find it overflows, it's not too hard or expensive to change.

    Bookmark   November 5, 2010 at 12:33AM
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brickeyee

"The first option is sometimes preferable,..."

Dropping a downspout onto a shingle roof is rarely preferred.

"I have seen a tee added with a horizontal piece with several holes in it to spread out the flow of water."

This will quickly clog with ANY debris that makes it into the gutters.
Unless you want to climb up to clean out the filter you have created, stay away from this.

Once you have collected water from a gutter into a downspout, try to keep it confined.

    Bookmark   November 6, 2010 at 10:28AM
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alan_s_thefirst

Didn't see they were shingles. I've never seen the arrangement I've described clogged, you leave both ends open.

    Bookmark   November 6, 2010 at 4:12PM
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brickeyee

"...you leave both ends open."

Then with a large rainfall the water ss going to come out there (even more so after the smaller holes clog up with debris).

Not a very effective way to control the runoff.

Water running sideways on shingled roofs is a common cause of leaking (look at how high valleys are woven or why flashed valleys are formed to try and limit any sideways runoff).

    Bookmark   November 7, 2010 at 12:52PM
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hendricus

Our previous house had this setup. Go option one and when the downspout hits the lower roof continue the downspout till you get to the next gutter. It will lay on the roof. Ours ended with an elbow in the direction of flow just above the second gutter. Water never ran on the roof from the downspout.

    Bookmark   November 8, 2010 at 11:35AM
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countryboymo

I would do like what you have in the second picture. I would send the water into the gutter flowing in the direction the gutter would flow whenever possible.

    Bookmark   November 26, 2010 at 3:45PM
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raee_gw

Had water from upper gutter dropping directly onto the roof of addition( option 1) Had water leak into the addition due to this. I'd recommend keeping the water in a downspout that routes to the lower gutter.

    Bookmark   December 5, 2010 at 9:20PM
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