Depending on the roofing material this may dictate what style can be used.
Weaving the valley of roofing.
Plus cutting the closed cut valley shingles can happen after the rest of the roof is shingled.
In order to shingle this kind of roof valley a roofing professional has to install both roof faces at the same time which is quite slow.
While a woven valley may save on initial installation costs because they require less.
If repairs are needed the contractor has to remove and then reweave multiple shingles to replace a single one.
It is a method where the valley is completed by overlapping and weaving the shingle courses rather than cutting the shingles back to form a trough lined with a sheet metal flashing see figure wv 1.
The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off.
With a closed cut valley there s no need to shingle the two roof planes at the same time.
Valleys are typically found where gable dormer roofs meet the main roof or when a house has angled wings or additions where two roof sections in different planes meet.
Roof installation how to shingle a valley hd by roofrepair101 more about roofing at.