Originally Posted By: mboehmer This post was automatically imported from our archived forum.
Inspected roof of new house - 3 dimensional shingle roof.
Had concerns about the valleys - didn't look like a proper installation or enough overlap to me. Also the edges of most of the shingles have granule loss - manufacturer's defect perhaps? Plz look at photo's and give me your opinion. I don't know a reputable roofer but will seek one out to look at these as well. Home owner has not moved in - house finished inside - builder putting sod down.
Originally Posted By: cbuell This post was automatically imported from our archived forum.
Can’t tell you much about the valley from the picture—it looks pretty normal. You can get that granular loss if you walk on them a lot when its hot.-----any chance they were installed when it was hot? I don’t really like the under course of shingles that run parallel to the valley, but it may be acceptable. It all depends on how far the other side runs up under the lapping side.
– It is easier to change direction than it is to forget where one has been.
Originally Posted By: jpeck This post was automatically imported from our archived forum.
Looks like they pulled the cut line back a bit too far from the center of the valley (should be about 2" up from the center of the valley).
As far as the trashed edges of the shingles go, looks like the roofer trashed them by walking on the edges, breaking them off, or it may be the way they were handled or stacked.
Originally Posted By: dvalley This post was automatically imported from our archived forum.
Michael,
That is one shi++y installation.
That closed weave installation in the valley is suppose to be centered. As Jerry stated. It's about 2 to 3" inches offset.
As far as those architectural edges lining up along the horizontal courses, WOW, I think the installers need glasses. That top 1/4" edge is suppose to be covered with the overlying shingle.
Originally Posted By: syared This post was automatically imported from our archived forum.
The valley should beck back from the centerline about 2" both Certainteed and GAF specify this. I curious what you guys say about it, if it isn’t cut back.
Originally Posted By: jpeck This post was automatically imported from our archived forum.
First, that’s not a “woven” valley, it is a “cut” valley.
The cut should be back 2" (I go by 'about' 2") toward the higher and steeper roof.
Yes, I write it up. If the cut line is not pulled back from the center, or is on the wrong side of the valley (the shorter roof overlaps the taller roof or is cut on the far side when lapped properly), the valley has an increased probability to leak.
The worst condition is for the shorter roof (if the valley has unequal roof faces on each side) to overlap the taller roof, and extend over the valley and up the other side. Yep, it's 2" off the valley center alright, but to the wrong side of the center, not to mention the wrong roof laps the wrong roof.