Needless to say this has been causing a problem for some time.
My first inclination is to build a big cricket, with a ridge that runs from the center of the dormer back to the main roof. Then, however, I have a place where two valleys converge in exactly the same spot. I am imagining putting some kind of large pan at the bottom of these valleys and valley metal above that would empty onto this pan.
Any other ideas?
Build a saddle for it, problem solved. 
A 3 foot roll of ice/water shield and then 24-36 inch aluminum valley flashing. A cricket would be better, but awful large and sightly.
metal valleys with a pan at the bottom, new flashing on the sides of the dormer, and I/W in that whole area, is what i would do.
[quote=“Agape”]http://i50.tinypic.com/rlkzkj.jpg
metal valleys with a pan at the bottom, new flashing on the sides of the dormer, and I/W in that whole area, is what i would do.[/quote]
Exactly what I had in mind. that pan at the bottom will have to be pretty big I think.
Shangle, It looks like an 8/12 tying into barely a 3/12.
What does the nailing/nails look like in the main field?
What is under the shingles?
Looks like a certainteed heather blend about 6 1/2 years old. 
http://www.roofing.com/images/topics/9769/img_1278194370.jpg
Saddles DO work, other side we just steped just like a chimney or skylite and used torch same as you would with back p
Hi Shangle, those hog valleys are real common around here, Agape has the best plan.Good luck-ray
[quote=“roof-lover”]Shangle, It looks like an 8/12 tying into barely a 3/12.
What does the nailing/nails look like in the main field?
What is under the shingles?
Looks like a certainteed heather blend about 6 1/2 years old. :)[/quote]
more like a 7 and a 4. Nails did not look terrible, but some areas were questionable. If they decide to tear off the whole roof I will go back with hot dip nails. I would guess age is closer to 10-12 years. Color is right on, but manufacturer must be tamko or old gafs cause they have english dimensions.
I also thought about building a small saddle and doing it in rubber. It is not in a location where it will really be viewed from the ground so the big cricket is probably the way to go.
The quickest cheapest and 100% leakproof way is to roof the area in EPDM rubber. one piece, keep the shingles up a couple of courses and run the rubber under it a good cople of feet. simple and quick without rebuilding the house.
[quote=“Agape”]http://i50.tinypic.com/rlkzkj.jpg
metal valleys with a pan at the bottom, new flashing on the sides of the dormer, and I/W in that whole area, is what i would do.[/quote]
Agape
Excellent solution. You are one of the best.
You have recommended a nice and useful solution…
EPDM saddle. Doesn’t have to be very tall/wide in center. 2’ to 3’ would be about right.
I agree 100%. The saddle would be good too, but more expensive.
It really comes down to funds available. Sure the best idea is a cricket and valleys, but is the HO willing/able to pay for that?
Great solution, thanks for sharing.
All these great minds think alike.
Shangle - Did you orginally do it or a builder or what? I cant imagine someone like you that has common sense would do that.
Wonder who the idiot is that thought that wouldnt leak.
[quote=“BAMBAMM5144”]All these great minds think alike.
Shangle - Did you orginally do it or a builder or what? I cant imagine someone like you that has common sense would do that.
Wonder who the idiot is that thought that wouldnt leak.[/quote]
Man I’m insulted!!! No, its not mine. Just mine to fix. Its an old building, probably from the 50s. I think it had a metal roof on it originally, and then it was replaced with asphalt shingles about 10 years ago or so. It was probably done in a satisfactory manner originally with the metal and then some bonehead tore it off and roofed it like this.
Thanks to all for your input, we re-roofed the whole thing last week.