Need some thought on roof tie in

[lzicc]

I am putting an addition on and ran into an issue with the front valley. If you look at the picture, the valley from the new roof to the old roof doesn't end at the corner of both roofs. It's hard to explain. What I need to do is extend the overhang for the 2 roofs to meet level, but the overhang would be 34" which is too long for an overhang. The issue is how I am going to run a gutter to the valley the way it sits now. I am going to try to take some better pictures.

 

[lzicc]

This is a picture from the top of the roof. Where you see that strip of shingle on the paper, that is how the valley goes.

[ATTACH=CONFIG]563319[/ATTACH]

 

[747driver]

I will give it a stab ! I am assuming you want to tie into the existing gutter and run a extension to the corner of the new addition ? Go ahead and make that overhang off the existing roof ( 12 inches ? ) the same size as all the overhangs to make it look right from the ground, then run the existing roof over to the new roof to make a new valley. You will have to make the fascia taller so you can run a short piece of gutter on the new addition corner where the new valley would end up. Best I can think of....when I do roofs I always visualize which way the water will run and build accordingly. Good Luck !

 

[EddieWalker]

Why not extend the existing roof out over the new roof and create a new valley?

 

[lzicc]

I thought about just extending the valley somehow, just not sure how. If I extend the overhang, it will be about 34" out. I think 24" is max, after that, it could sag or not hold the snow load I'm guessing.

 

[lzicc]

I thought about putting a conductor head at that valley. Just not sure how bad that would look.

 

[GLyford]

I think I would run the gutter around the corner past the valley. Then on the outside edge, add a piece of flashing that sticks up 6 or 8" so that the bigger flow coming down the valley doesn't overshoot the gutter.

If your are going to put the downspout right there anyway, the conductor head looks like a very good option, and might not need to have a flange of flashing sticking up if it is installed so that the line of water coming off the valley hits the far edge rather than going over it.

The bigger issue I see with extending the roof to 34" isn't support...you could always add a knee brace or something to support it. No, being in PA I think a large roof overhang like that is going to give you a cold section of roof right where all the snowmelt will be coming down. It will hit the colder roof section and freeze and be a constant source of ice dams. Yeah, you could always run heat tape, but I think I'd rather have the shorter roof and then create some form of funky looking gutter. Beats patching roofs and walls from water damage later.

 

[lzicc]

I agree GLyford, plus the extended overhang may not look right either.

 

[M5farms]

Thats tricky but a deflector flashing and conductor head is your only logical choice at this point. I see these kind of things all the time even high dollar architects can not understand the concept of getting water off a roof in a simple design. Use a ice and water peel and stick in the valley also .

 

[lzicc]

I think you are right M5farms. I already have the ice/water shield. I also put flashing down the valley prior to the ice/water shield.

 

[jfh28]

unfortunately there is no easy solution here.....basic architectural design 101 is never create a roof intersection like that........besides the obvious aesthetic nightmare at the front of your house more importantly is the creation of a very vulnerable spot in your roofing.......what is happening is all the water from the sloped gable section as well as the over-framed valley section is now being funneled down into one small point.......no matter how well that is flashed sooner or later it will leak......most likely in the winter with snow/ice build up......and torrential thunderstorm rains will easily overwhelm any scupper you can put there and you will get over shoot of torrents of water going down your walls......I would go back to whoever the architect was that designed this and tell them they created this now they can fix it......Jack

 

[ddbackhoe]

I am putting an addition on and ran into an issue with the front valley. If you look at the picture, the valley from the new roof to the old roof doesn't end at the corner of both roofs. It's hard to explain. What I need to do is extend the overhang for the 2 roofs to meet level, but the overhang would be 34" which is too long for an overhang. The issue is how I am going to run a gutter to the valley the way it sits now. I am going to try to take some better pictures.

View attachment 563317View attachment 563318

Extend the Ridgeline of the original roof out, flashing and Epdm wont stop that from leaking.

 

[ddbackhoe]

unfortunately there is no easy fix....I would go back to whoever the architect was that designed this and tell them they created this now they can fix it......Jack

Well if this was an episode on an HGTV show, we would take the roof off, then extend the wall height, add tray ceilings, some cool led soffit lighting, a retro claw foot soaking tub, glass shower, and an outdoor patio with bbq island and kegerator then put the roof back on.

 

[EddieWalker]

It might be easier to figure this out if you did a scale drawing from above, looking down.

 

[downsizingnow48]

From what I can make out, flashing the intersection and putting up a collector will not be satisfactory.

The normal solution to this kind of situation is to extend the existing roof to meet the new roof, so you get a normal valley at the intersection. I think that is what Eddie has already said.

It would help to take a photo of the top of the roof without all the white covering in the way, then we could see what is really going on there.

 

[Tompet]

unfortunately there is no easy solution here.....basic architectural design 101 is never create a roof intersection like that........besides the obvious aesthetic nightmare at the front of your house more importantly is the creation of a very vulnerable spot in your roofing.......what is happening is all the water from the sloped gable section as well as the over-framed valley section is now being funneled down into one small point.......no matter how well that is flashed sooner or later it will leak......most likely in the winter with snow/ice build up......and torrential thunderstorm rains will easily overwhelm any scupper you can put there and you will get over shoot of torrents of water going down your walls......I would go back to whoever the architect was that designed this and tell them they created this now they can fix it......Jack

Agree, also taller side walls on addition might have avoided this, but how did the progression of the build get to this point?
Less than ideal for sure, good luck and post any approach to resolution.

 

[lzicc]

I'll need to box in the gable ends, so that should fix the issue. I can run a gutter on that box to catch the valley. It shouldn't had ended up like that, but it did. I tried to plan for everything when making the plans for the addition, but didn't see this issue coming.

I'll get pics with the paper taken off so you can see it better, but boxing the the gable to eave end will give me a place to put a small gutter to catch the valley without looking too out of place.