To 5 1 2 in which is more than the minimum offset required by shingle manufacturers.
How to start a closed roof valley.
I work out of the valley with full shingles placing the lower corner of the shingle at the point where it crosses the valley facing edge of the starter shingles.
Stretch it about 12 inches across the centerline.
Fasten the shingles about 6 inches away from the centerline on both sides.
A closed cut asphalt shingle roof valley starts the same way as a woven valley with the first course of shingles run across the valley from both roof planes lapping the shingle from the larger or steeper roof plane over the shingle from the smaller shallower plane.
The methods taught in these video s are just a few of many ways to do construction.
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Start by laying all shingles on one side of the roofing and stretch it across the valley.
The self adhering section acts as the lining for the valley.
Use your best judgement of.
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I begin the second side the side that will be cut by snapping a cutline 2 in.
Generally the angle of the valley sets up a shingle joint offset of about 5 in.
With a closed cut valley there s no need to shingle the two roof planes at the same time.
From the valley center.
Plus cutting the closed cut valley shingles can happen after the rest of the roof is shingled.
Roof installation how to shingle a valley hd by roofrepair101 more about roofing at.
When finished the valley and its underlayment will be completely covered with asphalt shingles.
Draw a 2 inch self stick flashing down the center.