Comp shingle TEST

Is this valley cut properly?

please elaborate on your answer.



Do you have a lower view?

The shingles from the larger roof plane overlap the smaller plane. I understand this to be acceptable. Am I missing anythin…

What is wrong with this in your opinion.
This is being disputed by the insurance provider.


Lower view??? If you mean from eave looking up NO sir

No, the right side should be run under the left, and have solid flashing underneath of either roofing felt, metal or roll roofing. IMO


Maybe the insurance company’s issue is that the steeper pitch should technically overlap the lower pitch.

I agree with Ken.

Exactly! That’s their opinion and want redone even though two other independent roofers disagree. I’ll save my opinion and await further replies.

I would have run the shallower pitch up onto the steeper pitch and cut off the steeper pitch shingles to help prevent water running under the lower cut shingles.

It looks like the gutter misses the valley run off nicely.

What if the valley is properly flashed and has ice and water shield.

We used to run “bleeders” with a line of roofing tar before laying the cut shingles in the valley.

That’s an entirely different issue but you are right.
Give that man a cigar!

Maybe Nick can get us some Cubans for door prizes :mrgreen:
Nothing beats a illegal Cuban Cohiba

From the ground looking up, the shingles on the right (our left, as we view the photo) should be cut back 2" from the valley center. There should be no nails within 6" of the center of the valley.

The cut is on the wrong side for a closed-cut valley.

Well, maybe he can…:mrgreen:

According to some manufacturers, the shingles on the deck with the greatest amount of watershed are the ones that are cut and they are cut back about 2" from the valley centerline and embedded in a 2" wide strip of asphalt roofing cement.

I see this allot in my neck of the woods

The lower roof is always run under the higher roof regardless of pitch. There is more water volume coming off the high side that you would want to run “over” the cut. JB is correct on the 6 inches and it is kept up 2-3 inches so the other side can’t “run up” under the cut (or you can tar under the weave). We run ice and water down the valleys for a little extra protection. The way the caps run usually can give a hint as to which side should overlap. Just my humble experiences…

This is not a cut valley. They ran a starter course down the valley with the slots perpendicular to the main slope facing drainage of the gable. Water will run right up under the main roof shingles.

The main roof shingles do not extend into the valley as they should. They started laying shingles from the valley instead of to it. All the corners line up.