Then starting at the base of the.
Roof shingles on a valley.
All valleys start the same.
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.
Install replacement shingles at each side of the valley such as composition shingles or wood shingles that match the existing shingles.
Starting at the bottom edge of the valley begin laying down the shingles.
In addition it is important to avoid nailing the shingles through the valley metal.
Lay one and two tab shingles as you near the valley so full size shingles will run across 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.
Cut the tabs off of one shingle and lay it on the bottom edge with a 1 4 inch overhang.
Ensure ice and water protector has been installed along the valley first.
As the asphalt shingles are installed over the roof deck the shingles are extended into the valley.
Stop nailing 6 inches from the center.
When shingling a roof with three tab shingles it s easiest to shingle the roof planes first working toward the valley.
Align the lower edge of each shingle with the lower edges.
Press the shingle into the valley and make sure that it is flat against the surface of the roof.
Place a roofing nail in each corner and one in the center on its appropriate side.
However these shingles are not run entirely through the valley area but rather the center of the metal valley is left exposed.
Shingle the other side of the valley the same way.
Only nail at the edges with only enough nails to.
Laminated shingles let you start in the valley and work outward which can be an advantage in some situations.