Roofing Valley Techniques Dogear

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Roofing valley techniques dogear. In this video we ll flash the valley. Take care not to place any fasteners in the exposed center area of the metal flashing. Essentially there are three main ways to shingle a roof valley. Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic.

Also apply cement to attach the top layer shingles to each other see steps 5 and 6 in open metal valley above. In a previous video we covered how to flash roof edges before shingling. 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. Woven closed cut and open.

When shingling a roof with three tab shingles it s easiest to shingle the roof planes first working toward the valley. Pull out the nails with the bar. Valleys are a prime leak area so it s important to be careful. Gaf mastering the roof chapter 12 this video demonstrates the proper installation technique for installing roofing valleys.

When deciding how to shingle a roof valley you will need to consider your materials the climate and the desired look of the roof. The open woven and closed cut methods are demonstrated. First clean the debris out of the valley including sawdust nails and whatever else is in there. 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.

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. Apply two beads of roofing cement to attach the top layer shingles to the bottom layer shingles. Laminated shingles let you start in the valley and work outward which can be an advantage in some situations. Clip the top corner of shingles along valleys to keep water flow toward center of valley.

There are various techniques you ll need to know for each type of installation which we ll go over in detail. Cut corners and apply cement dub cut the top layer shingles see step 4 in open metal valley above.