» Roof overhang leak problem

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  Post subject: Roof overhang leak problem
PostPosted: Thu Jun 23, 2011 3:22 am 
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Hello,
I'm looking for some advice on a problem with my roof. The main section of the roof intersects with the roof over the front porch/garage with a valley at the intersection. However, the valley does not extend all the way to the eave of the porch roof, so there is an overhang with a vertical gap between the two roofs. I believe that water is travelling down the valley or down the porch roof and then finding its way into this gap. The lower section of roof has some leaks where it meets the siding of the house, which is causing water to drip down the side of the house in multiple places. In addition, in the winter the snow piles up in the gap, turns to ice, and then melts and causes damage to the fascia and the same dripping problem on the siding.

Any suggestions on how to fix this problem? I think that the best way would probably be to extend the valley down to the eave by adding framing and shingles, but I am hoping there is an easier solution.

Thanks

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  Post subject: Re: Roof overhang leak problem
PostPosted: Thu Jun 23, 2011 3:48 am 
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ive seen this a TON.


that gutter is the main problem. the water from the upper roof is crashing into the gutter, running to the left, then when it exits onto the lower roof, it runs right under the shingles, forcing it to go "up".

that gutter should have a cap at the end, and either a downspout connecting it to the lower gutter, or simply a hole in the gutter just above the gutter below it.

have someone cut exactly 3 feet off of that gutter, put a cap on it, and cut a hole in the bottom. see how that works first. if your problem still persists, then start working on the roof.

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  Post subject: Re: Roof overhang leak problem
PostPosted: Thu Jun 23, 2011 5:44 pm 
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You have two issues. One issue is the top gutter drains on to the roof. This is the biggest problem. the top gutter should only drain into the lower gutter. The second issue is the bottem of that valley is done incorrectly. No valley metal to extend past the valley and away from the corner. Cap off that gutter and drain it to the lower gutter . Replace the rotten wood , shingles under the valley and replace the shingles in the valley adding valley metal.


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  Post subject: Re: Roof overhang leak problem
PostPosted: Thu Jun 23, 2011 6:46 pm 
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You're getting good advice.
One other thing though. The fascia there has no step flashings, None. I can see right under there. THat has to be flashed also, starting from just below where the soffit meets the roof line.


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  Post subject: Re: Roof overhang leak problem
PostPosted: Fri Jun 24, 2011 1:03 am 
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Thanks everyone for the replies.

I should mention that the upper roof gutter is actually draining away from the valley (off to the right out of the photo), not towards it, so there shouldn't be any additional water from that gutter.

Extending the valley sounds like a good idea. So the metal valley extension goes on top of the shingles? How can the metal valley be extended if the valley ends and there is no further V-shape?


Last edited by dave64 on Fri Jun 24, 2011 3:31 am, edited 1 time in total.

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  Post subject: Re: Roof overhang leak problem
PostPosted: Fri Jun 24, 2011 1:08 am 
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dave64 wrote:
Thanks everyone for the replies.

I should mention that the upper roof gutter is actually draining away from the valley (off to the right out of the photo), not towards it, so there shouldn't be any additional water from that gutter.

Extending the valley sounds like a good idea. So the metal valley extension goes on top of the shingles?



True that the gutter may be pitched that direction, but if there is no cap on the end of it, and there does not appear to be, a good rain will have water running out the end.

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  Post subject: Re: Roof overhang leak problem
PostPosted: Fri Jun 24, 2011 6:50 am 
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good eye tinner.


and just like shangle said, just because the gutter is pitched the other way, doesnt mean in heavy rain that lots of water isnt going that direction.


so in this order:


cut and cap gutter. either put hole so it drains to the lower section, or let it run to the right.

remove shingles in that area.

replace rotted wood

install waterproof membrane

install valley metal, allowing it to slightly overhang the end of the valley.

install new shingles, making sure to take care to properly step flash where needed (against walls and that fascia where it meets the roof line.

relax and drink beer.




the final step is the most important, and must be followed or none of it matters. (the beer part, not the shingles)

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  Post subject: Re: Roof overhang leak problem
PostPosted: Fri Jun 24, 2011 1:33 pm 
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Because the roof is already in place, the upper fascia should have a job-site made "step" flashing on the outside of it (starting from underneath the valley end) and then under the shingles abutting it on the lower section of the roof to divert water away from the fascia and back out onto the shingles on the lower portion of the roof.

Furthermore, I see no "kick out" flashing behind the siding and acting as the very first step flashing where the lower portion of the roof abuts the siding / fascia intersection just above the right end of the lower roof portion gutter. If there is step flashing there and no kick out then the siding is swallowing water.

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  Post subject: Re: Roof overhang leak problem
PostPosted: Fri Jun 24, 2011 1:37 pm 
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Metal valley is nice, but not necessary. As stated, a couple step flashing up the fascia. And shingle the valley bottom properly and you will eliminate you problem.
-The first row of your upper roof should extend past the valley and under the first course of the lower section that passes through the valley.

And if you have water coming through where that lower section and the wall meet, check to see if there is any step flashing behind your siding.


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  Post subject: Re: Roof overhang leak problem
PostPosted: Fri Jun 24, 2011 5:50 pm 
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You can have a funtional roof even if you keep the gutter the same way it is.

You have main two failures...

1 The bottom of the valley is incorrectly done...and needs repaired
2 if there is no flashing at the wall...then install new flashing

Yeah! you could box the gutter, It would look unnappealing but functional
Keep the gutter the same way...BUT have it snipped at least 2 inches away from the deck (clearance), then you will be ok!

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  Post subject: Re: Roof overhang leak problem
PostPosted: Sat Jun 25, 2011 2:52 am 
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Thanks again everyone for the advice. I will cap the gutter and extend the valley, and add flashing at the wall since it is definitely leaking there. Looks like I have some work ahead of me...


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  Post subject: Re: Roof overhang leak problem
PostPosted: Tue Jun 28, 2011 2:04 pm 
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and don’t forget gutters should be absolutely clear from debris etc..
good luck


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  Post subject: Re: Roof overhang leak problem
PostPosted: Tue Jun 28, 2011 3:54 pm 
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Dave, you mention you are in an area with snow load issues... where exactly? What city / state / province?

All the areas of your roof could benefit greatly from some Ice & Water membrane as well.

Thankfully for a non-roofer, the pitch appears to be "consumer friendly" so it's easier to work. You will spend 3x as much time if you try to only remove the shingles you need to work the area(s) in question, however IMO it's much easier to identify the highest point of the work you need to get into + the furthest to the Left & Right... then add about 12" & remove everything inside of that area.

Do your work down to the bare roof deck & then replace product as needed back up to your removed areas.

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  Post subject: Re: Roof overhang leak problem
PostPosted: Wed Jun 29, 2011 6:04 pm 
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Hey RanchHand,
I am in Southeast Michigan. Since the leak is happening whether there is snow or rain, I am hoping that proper flashing will solve this. I'm also planning on adding the membrane to this section. Thanks for the tips.



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  Post subject: Re: Roof overhang leak problem
PostPosted: Thu Jun 30, 2011 9:44 pm 
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Agape wrote:
good eye tinner.


and just like shangle said, just because the gutter is pitched the other way, doesnt mean in heavy rain that lots of water isnt going that direction.


so in this order:


cut and cap gutter. either put hole so it drains to the lower section, or let it run to the right.

remove shingles in that area.

replace rotted wood

install waterproof membrane

install valley metal, allowing it to slightly overhang the end of the valley.

install new shingles, making sure to take care to properly step flash where needed (against walls and that fascia where it meets the roof line.

relax and drink beer.

hear!hear!


the final step is the most important, and must be followed or none of it matters. (the beer part, not the shingles)


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