There is a variation on the closed cut referred to as a california valley.
Roof valley shingle weave.
To achieve a woven valley installation a roofing professional lays shingles in the valley and weaves them together.
Woven valleys should only be used with strip shingles.
Woven open and closed cut.
A woven valley shingle installation is one where the shingles from both sides of the roof valley extend over the valley and weave together overlapping courses alternately.
To achieve a woven valley installation a roofing professional lays shingles in the valley and weaves them together.
Some homeowners prefer the consistent look that a woven valley provides.
But if the shingles are not laid in the valley properly a woven valley may not lay flat creating bumps and detracting from the overall look of the roof.
Some homeowners prefer the consistent look that a woven valley provides.
Here are diagrams of each style valley style.
There are three common valley details.