Roofing Shingles How To Install Valleys

The open woven and closed cut methods are demonstrated.

Roofing shingles how to install valleys.

Then starting at the base of the. Closed valleys are completed during shingle installation. As with any asphalt shingling job i install a 9 in. Ensure ice and water protector has been installed along the valley first.

To secure the roof valley flashing nail it down carefully. With underlayment and flashing installed apply shingles up to one side of the flashing. These strips go under the drip edge. 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. 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. Strip of wsu along the eaves edges and i crosslap the strips at the valley. 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.

For longer roof performance iko strongly recommends open metal valleys. Only nail at the edges with only enough nails to. Valleys are a prime leak area so it s important to be careful. Do not drive nails into the flashing.

I overlap the inside corner of the drip edge at the valley to minimize sharp edges that could cut into the wsu over time.