Another open valley construction
theslateman
| Posted in Construction Techniques on
Here is a copper valley with a 3/4″ lip at the slate exposure line.
Must have been to keep the valley slates in alignment.
Guess whats happened to the bedroom ceiling?
Replies
I love those kinds of things. Too many people figure if it's done with fancy materials, it must be right.
http://grantlogan.net/
This is the mark of one of the big commercial co.'s nearby.
It was done many moons ago,but now has problems.I did a roof inspection today on this house, and pointed up a lot of issues to address.
But it looks so pretty.
Walter
Why is it leaking? Just currious because I dont see the problem thats obvious to guys like you and seeyou.
Doug
Doug,
The water can't flow freely over the slates and directly onto the valley sheet. It is dammed up slightly with that raised rib at the exposure line,causing water to flow down the inside of the rib too.
After time erosion corrosion has worn away the copper in behind and it leaks down low in the valley.
Outwardly it doesn't look bad, but having done several of this seldom seen technique over again, it will be part of my quote to fix up this house which is changing hands.
Walter
Thanks, I'd a never guessed that would cause the problem.
Doug
You know, it's a pity, because it sure does look purdy.
I never tire of looking through posts from you and Grant. You too, Duane.
I'm going to be putting a garage addition on my own house, when I do I want to transition from the achitectural asphalt shingles that I have to some sort of metal roof. Something like a standing seam, or a derivative of that.
The house is a simple gable. The addition will have a few valleys, maybe a dormer or two.
I've got a bit of learnin' ahead of me in terms of figuring out what type of material to use, ease of application, proper detailing, etc.
Yet another project on the "to do" list.
Best, Mongo