Proper Way To Shingle A Roof Valley

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.

Proper way to shingle a roof valley.

Use 4 nails per shingle and 6 nails on the prevailing windward sides of the roof as wind resistance nailing. Laminated shingles let you start in the valley and work outward which can be an advantage in some situations. Only nail at the edges with only enough nails to. All valleys start the same.

The original plan was to preserve a portion of the existing roof since. As the asphalt shingles are installed over the roof deck the shingles are extended into the valley. 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. From the stepped off main part of the roof run shingles into the valley and cut them square from where the bottom corner intersects with the shingles nailed along the valley line.

To secure the roof valley flashing nail it down carefully. Repeat this basic pattern alternating shingles across the roof working toward the right side using the chalk line to keep the shingles straight horizontally. Place the nails along the edge of the valley metal not into it. There are two simple rules to follow.

Ensure ice and water protector has been installed along the valley first. Butt a full shingle up against the cut shingle and nail into place. However these shingles are not run entirely through the valley area but rather the center of the metal valley is left exposed. One nail goes into the top section of the shingle where it covers the valley metal.

Imbed each step flashing in a 75 mm 3 wide application of asphaltic plastic cement and nail in place. Remove existing roof and underlayment. When shingling a roof with three tab shingles it s easiest to shingle the roof planes first working toward the valley. In addition it is important to avoid nailing the shingles through the valley metal.

Each flashing should overlap the one below by at least 75 mm 3 but not be visible below the shingle top lap.