W-valley flashing lower end detail needed

[matt_i]

Just wanted to see if anyone has a good detail or pic(s) of the lower edge of W-valley flashing installation, on a shingled roof. Disclaimer, I'm not a roofer except right now searching for sage advice.

Couple of pics of what I currently have.



My debate is about what to do with the lower edge, I bent this with a flanging tool into a 90 degree "drip edge". I've seen it where the same flange is bent back almost like a hem, and then hooked over the existing drip edge. However that system would appear to push a lot of water directly down on the drip edge. My shingles and starter strips all overlay/overhang the drip edge by approx 3/4" so it makes some sense to me to also extend the W-valley out by the same amount, so it can ultimately pour into the gutter. ALso it occurs to me that the majority of the water comes right next to the center rib, so pushing the "corner" of the flashing cut out (down the centerline axis of the valley) from the building internal corner appeals to me.

I've tried typical web research for drawings and pictures, 10,000 of which show the completed valley from the peak of the ridge, several others deal with metal roofing systems, but no lower details I've found dealing with a shingled roof.

Thanks for any advice

 

[Ole Slewfoot]

My shingling days are hopefuly long gone, but it looks to me like you are fine, you did a little extra work making the bend because ...you live there.
IIRC, we clipped the V out of the bottom, laid it down just shy of the bottom of the starter strip, and painted it color match with the shingles. as long as you are over the drip edge flashing, you are good to go. some even leave em straight.
I won't say it looks bad
http://dmr-gutters.com/cg/Bennett.htm
Some bend em down
http://www.slateroofcentral.com/install_snow_aprons.htm
Ours mostly looked like this except with comp shingle

more than an inch of snow here would be big news, building for snow might change the formula.

 

[matt_i]

Thanks Ole Slewfoot, seems like I'm on a decent tack. Here's another sketch I made, sort of crude, but the metal drip edge only has 1/2" overhang, and I worry about the gutter being able to get that close. The shingles overhang another 3/4" so it seems like that's the line I want to maintain (shingle edge to the w-valley), for actual falling water.

 

[matt_i]

Top views, if I keep the W-flash close I get this



If I extend it, I get this...


The "extend" seems to be more like what I think I want. Just gets the metal flashing edge lower than the drip edge, and viewed overhead, the same lines are used. The only real disadvantage I can see is that more metal is hanging out unsupported, but it seems like there's plenty of heavy stuff sitting on the edges

 

[K'ledgeBldr]

You need a "loose lock" eve detail. Even though you maybe accomplishing a good water route there's still the possibility of uplift and expansion/contraction.

I think you'll find what you're looking for here-

http://www.copper.org/applications/architecture/arch_dhb/

 

[matt_i]

Thanks! Outstanding details in that .pdf, exactly what I was looking for