Roofing Shingles How To Install Valleys

Closed valleys are completed during shingle installation.

Roofing shingles how to install valleys.

With underlayment and flashing installed apply shingles up to one side of the flashing. Then starting at the base of the. I overlap the inside corner of the drip edge at the valley to minimize sharp edges that could cut into the wsu over time. These strips go under the drip edge.

As with any asphalt shingling job i install a 9 in. The open woven and closed cut methods are demonstrated. 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. For better results try to use full size shingles going into a closed valley one without metal flashing as this can eliminate nailing too close to the centerline.

Where possible install three tab shingles so that the tabs falling over metal valleys or rake edges at the side of the house are at least four inches wide. Only nail at the edges with only enough nails to. Do not drive nails into the flashing. For longer roof performance iko strongly recommends open metal valleys.

Complete the application of underlayment and valley flashing before the roofing shingles are applied. To secure the roof valley flashing nail it down carefully. Strip of wsu along the eaves edges and i crosslap the strips at the valley. Ensure ice and water protector has been installed along the valley first.

Gaf mastering the roof chapter 12 this video demonstrates the proper installation technique for installing roofing valleys.