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Rain bypassing gutter dmhamilt 11-02-2007
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Posted by on November 2, 2007, 1:59 am
I have fairly new gutters and they are not working. The rain runs
between the house and the gutter. I have verified that the shingles
overlap into the guttter, but the water sticks to the bottom side of
the shingle instead of dripping into the gutter. The water runs
underneath the shingle back towards the house and runs between the
house and the gutter. In some instances the water accumulates above
the soffit at eave vinyl. I am concerned this will rot the roof.

I already have drip gaurds.

Any ideas on what to look for? or how to fix it?


Posted by franz frippl on November 2, 2007, 8:33 am
On Thu, 01 Nov 2007 22:59:35 -0700, dmhamilt wrote:

> I have fairly new gutters and they are not working. The rain runs
> between the house and the gutter. I have verified that the shingles
> overlap into the guttter, but the water sticks to the bottom side of the
> shingle instead of dripping into the gutter. The water runs underneath
> the shingle back towards the house and runs between the house and the
> gutter. In some instances the water accumulates above the soffit at eave
> vinyl. I am concerned this will rot the roof.
>
> I already have drip gaurds.
>
> Any ideas on what to look for? or how to fix it?

By "drip guards" do you mean those things which keep debris out of the
gutters?

If so, my experience is that during heavy rainfall water flows too fast
and the caps prevent all the water from getting into the eaves. Light
rains aren't a problem since the flow of water off the roof is less.


Posted by JB on November 2, 2007, 8:41 am
On Nov 2, 1:59 am, dmham...@gmail.com wrote:
> I have fairly new gutters and they are not working. The rain runs
> between the house and the gutter. I have verified that the shingles
> overlap into the guttter, but the water sticks to the bottom side of
> the shingle instead of dripping into the gutter. The water runs
> underneath the shingle back towards the house and runs between the
> house and the gutter. In some instances the water accumulates above
> the soffit at eave vinyl. I am concerned this will rot the roof.
>
> I already have drip gaurds.
>
> Any ideas on what to look for? or how to fix it?

Sorry...I don't have a solution but if you live somewhere where winter
is really winter, I'd also be very concerned about ice forming under
the shingles and allowing water to get into the roof, walls, etc.

--Jeff


Posted by DerbyDad03 on November 2, 2007, 9:09 am
On Nov 2, 1:59 am, dmham...@gmail.com wrote:
> I have fairly new gutters and they are not working. The rain runs
> between the house and the gutter. I have verified that the shingles
> overlap into the guttter, but the water sticks to the bottom side of
> the shingle instead of dripping into the gutter. The water runs
> underneath the shingle back towards the house and runs between the
> house and the gutter. In some instances the water accumulates above
> the soffit at eave vinyl. I am concerned this will rot the roof.
>
> I already have drip gaurds.
>
> Any ideas on what to look for? or how to fix it?

The drip edge need to extend into the gutter. The surface tension of
the water is causing it to hang onto the shingles and curl back
underneath.

It's not perfectly clear from the picture at this site, but if you use
your imagination, you can see that the "vertical" part of the drip
edge will hang down into the gutter once the drip edge is slid under
the shingles.

http://www.thisoldhouse.com/toh/skill-builder/0,,193154,00.html

The other option is to increase the pitch of your roof to overcome the
surface tension. I'm guessing new drip edge is cheaper.


Posted by HeyBub on November 2, 2007, 11:25 am
dmhamilt@gmail.com wrote:
> I have fairly new gutters and they are not working. The rain runs
> between the house and the gutter. I have verified that the shingles
> overlap into the guttter, but the water sticks to the bottom side of
> the shingle instead of dripping into the gutter. The water runs
> underneath the shingle back towards the house and runs between the
> house and the gutter. In some instances the water accumulates above
> the soffit at eave vinyl. I am concerned this will rot the roof.
>
> I already have drip gaurds.
>
> Any ideas on what to look for? or how to fix it?

L-shaped flashing under the shingles extending down into the gutters.

Easy to install - if you don't mind up-and-down on the ladder.



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