The open woven and closed cut methods are demonstrated.
Roofing valley techniques dogear.
First clean the debris out of the valley including sawdust nails and whatever else is in there.
Roof valleys are like gutters with a steep pitch but the stakes are higher for valleys than they are for gutters.
When deciding how to shingle a roof valley you will need to consider your materials the climate and the desired look of the roof.
When shingling a roof with three tab shingles it s easiest to shingle the roof planes first working toward the valley.
Woven closed cut and open.
I then move the shingle to the uppermost course on the roof plane line up the mark on the shingle with the valley center and again mark the corner.
Apply two beads of roofing cement to attach the top layer shingles to the bottom layer shingles.
Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic.
Take care not to place any fasteners in the exposed center area of the metal flashing.
There are various techniques you ll need to know for each type of installation which we ll go over in detail.
To shingle out of the valley with laminated shingles lay a shingle down as a gauge and mark the corner at the bottom left and top right of the roof.
Iko recommends that you install architectural shingles with the open valley method for the best roof performance.
Laminated shingles let you start in the valley and work outward which can be an advantage in some situations.
Also apply cement to attach the top layer shingles to each other see steps 5 and 6 in open metal valley above.
Experts recommend that you give yourself 8 to 10 inches of clearance on each side of the valley.
Clip the top corner of shingles along valleys to keep water flow toward center of valley.
In this video we ll flash the valley.
Cut corners and apply cement dub cut the top layer shingles see step 4 in open metal valley above.
Gaf mastering the roof chapter 12 this video demonstrates the proper installation technique for installing roofing valleys.
Valleys are a prime leak area so it s important to be careful.
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Use a nail bar to loosen the shingles in the affected area insert the bar under a shingle and pry upward at a the location of each nail to loosen a nail.
