Proper Way To Shingle A Roof Valley

This picture gives you an idea of the condition of the existing roof plywood and you.

Proper way to shingle a roof valley.

All valleys start the same. As the asphalt shingles are installed over the roof deck the shingles are extended into the valley. 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. In addition it is important to avoid nailing the shingles through the valley metal.

Place the nails along the edge of the valley metal not into it. One nail goes into the top section of the shingle where it covers 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. Ensure ice and water protector has been installed along the valley first.

When shingling a roof with three tab shingles it s easiest to shingle the roof planes first working toward the valley. Then starting at the base of the. Repeat this basic pattern alternating shingles across the roof working toward the right side using the chalk line to keep the shingles straight horizontally. 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.

How to shingle a roof 90 pics pro tips recommendations step 1. To secure the roof valley flashing nail it down carefully. However these shingles are not run entirely through the valley area but rather the center of the metal valley is left exposed. 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.

Only nail at the edges with only enough nails to. Imbed each step flashing in a 75 mm 3 wide application of asphaltic plastic cement and nail in place. Butt a full shingle up against the cut shingle and nail into place. Laminated shingles let you start in the valley and work outward which can be an advantage in some situations.

Use 4 nails per shingle and 6 nails on the prevailing windward sides of the roof as wind resistance nailing.