When deciding how to shingle a roof valley you will need to consider your materials the climate and the desired look of the roof.
Roofing a speed valley.
Iko recommends that you install architectural shingles with the open valley method for the best roof performance.
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.
While the slope of the common rafters are expressed as x in 12 the slope of the hip and valley rafter on the same roof will be x in 16 97 so where two roof sections intersect to form a 90 angle a regular hip or valley and each roof.
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.
Here is eric s method.
The three methods to shingle a roof valley.
But in the past and in low end installations roll roofing or a similar material is used.
Here s a valley where the roll roofing liner has.
A california valley is faster than cutting all of the shingles up a valley.
The valley is protected from moisture intrusion by a lining.
Courtesy of mike roberson.
Plus cutting the closed cut valley shingles can happen after the rest of the roof is shingled.
On a related note the pitch properly the slope of a hip or valley rafter will not be the same as the pitch of the adjacent roof sections.
I usually find the middle of valley then move up hill two inches and pop a line parallel to the valley and set the edge of the valley shingle on that line.
With shingles bedded in cement it can be exported to other states.
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The valley shingle the one turned sideways almost looks like it is over the valley in one of the pics.
Instructional video on how to install a closed roof valley as part of installing tamko building products heritage series of laminated asphalt shingles.
If you re not having any problems i wouldn t worry about it.
This is an open valley lined with shingles and is a defective installation.
Today most linings are made of metal.
This recommendation includes iko s premium shingles.
Closed cut valley even if i work toward the valley with three tab shingles cut valleys are faster than woven valleys hands down.
Look down the ridge of the valley metal to make sure it is straight from top to bottom and nail it off.