valley weave

[John Arnold]

I don't get to see a lot of valley weaves. How's this look?

[Nick Ostrowski]

I can't see any issues John. No exposed nailheads and no buckling on the shingle surfaces. There's so much you can't see in regard to the installation of these types of valleys

[John Arnold]

Thanks Nick. I knew there was something about trimming corners off, but apparently you can't see if this has been done.

[Chad Fabry]

It looks pretty nice. You cut the corners on closed cut valleys.

[Scott Patterson]

Weaving or plaiting shingles is a lost art.

[Jerry Peck]

When weaving a valley, it is best to have a full tab at the valley. That photo shows full tabs starting after the water has already gone in under it.

Some of those, such as the lower left, and the 4th and 5th courses up on the right, are over exposed (as are others).

[Chad Fabry]

I think I understand what you're saying Jerry, but having a full tab in the valley for every shingle would require significant effort: you can only adjust a shingle in specific increments that are determined by the keyway repeat pattern and one must be careful that the butts weren't too frequently aligned as the course approached the valley.

For it to work they'd have to start the courses in the valley and it might not work at all depending on pitch. It'd be almost impossible for it to work on a valley where the two roof pitches were different as that style of valley requires an occasional double coursing on one roof plane to keep the valley from wandering off to the side.

[Jerry Peck]

but having a full tab in the valley for every shingle would require significant effort:

Quite correct.


For it to work they'd have to start the courses in the valley ...

Correct again.

And make the difference up a few singles out from the valley (assuming the shingle laying started at the gable) or just continue running the shingles out to the gable (basically laying the shingles in the reverse direction).

Typically, on the better ones I've seen (which were few and far between) they would start at the gable as they normally would, get near the valley, then start at the valley and work their way back toward the previously laid shingles, making small adjustments to the shingle length as they worked back toward the previously laid shingles). Upon close examination, you could tell what they cut where, but not at first glance.

Weaving a valley *IS* 'a lot of extra work', so most opt 'not do it' instead of 'doing it just however it comes out'.

I suspect that may be one reason why cut valleys are so common. Lay one side, lay the other side and cut it back 2" from the center of the valley in a straight line (of course, then we find where they laid the wrong side first :( ).

[BARRY ADAIR]

John,

Here's what is seldom seen nowadays
Note the square tab through the valley

[Jerry Peck]

Barry,

Nice photo of a nice woven valley!

[Fred Franks]

was I wrong for mentioning this valley weave?

[Billy Stephens]

was I wrong for mentioning this valley weave?

Fred,

Yes if it was Dr. Frankenstein's House. :D

[Fred Franks]

The realtor called me and wanted to know why I had mentioned it. He also asked me "have you ever heard of lacing a valley?" and I asked him " have you ever heard of doing it right?" He then proceeded to tell me that it is not against code and he wanted me to change it. I would not

[Jerry Peck]

He also asked me "have you ever heard of lacing a valley?" and I asked him " have you ever heard of doing it right?"

EXCELLENT response, Fred. :D

[Fred Franks]

Thanks Jerry, and Billy, I needed the reassurance. I Am new at doing home inspections and try to do a good job, but I am not very popular with the realtors. I just tell it like I see it -He kinda intimidated me and I was worried I had said the wrong thing. I'm sure I will hear from him again on monday

[Jerry Peck]

Fred,

Go up to Barry's post with the well done woven valley, click on the photo, when it pops up, right click on it and save it to your computer.

When that agent calls on Monday, say 'Tell you what, I just happen to have a photo of a properly done woven valley, what is your e-mail address and I will sent it to you. That way YOU can compare the two photos, the 'good' one and 'yours'.'

[Billy Stephens]

--- I'm sure I will hear from him again on monday

Fred,

No problem if it's not a poorly done amateur installation. :rolleyes:

I'm sure The Professional Roofing Company that installed the roof will be glad to extend their Warranty to his client. :D

[kevin ingalls]

I need some help with a valley weave on a roof. I was informed this weave was OK. When I look at it there was debre and dirt under all the tabs
Can I get a proffesional opinion on this
Thanks Kevin

[Scott Patterson]

I need some help with a valley weave on a roof. I was informed this weave was OK. When I look at it there was debre and dirt under all the tabs
Can I get a proffesional opinion on this
Thanks Kevin

I can't tell anything from that picture. Did you get that out of a book?

[John Kogel]

If that fuzzzy pic is the roof you are asking about, no, it is wrong. The shingles should not go way through the valley and up the other side like that.

[Michael Thomas]

Standing there last week with the current owner (my client at a water intrusion inspection) - who had just paid to have this roof installed - my first look at this valley (which was my first look at the roof) sort of left me at a loss for words for a moment...