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Robert Jones

Comp shingle valley install?

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Something just doesn't look right to me with the install in this valley. Am I wrong.? There was quite a bit of overlap, just have never seen the shingles at the valley exposed like this. Poor attempt at a weave?

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You're not wrong, Robert. That valley is wrong. For a weave the shingles should go farther. It could now be turned into a cut valley, but only if there's enough overlap on the uncut side.

Up here on new construction, the authorities want to see open metal valleys, not the valleys of sunny California. [:)]

But the point is, the authorities don't have much faith in woven or cut valleys. They plug up with debris and moss and develop leaks.

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From the OP photo I cannot discern anything wrong with what I refer to as a woven valley.

Marc

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From the OP photo I cannot discern anything wrong with what I refer to as a woven valley.

Marc

Look again. It's not woven. One side goes under, the other side goes over. It's a closed cut valley where the installer forgot to trim the cut side.

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It's a closed cut valley where the installer forgot to trim the cut side.

That's what it looks like from my seat.

Robert, did you measure the distance between the valley center line and shingle joints in the underlying courses to see if they ran up the other side far enough?

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