Roof Shingles On Valleys

Typical valley flashing is 14 inches wide.

Roof shingles on valleys.

For closed cut valleys shingles on one roof plane are installed through a valley and extended at least 30 cm into the intersecting plane. Press the shingle into the valley and make sure that it is flat against the surface of the roof. Valleys are a prime leak area so it s important to be careful. Place a roofing nail in each corner and one in the center on its appropriate side.

Position an extension ladder against the lower edge of the roof near the valley that is repaired. However these shingles are not run entirely through the valley area but rather the center of the metal valley is left exposed. Starting at the bottom edge of the valley begin laying down the shingles. Start at the upper row of shingles at the upper end of the.

As the asphalt shingles are installed over the roof deck the shingles are extended into the valley. Then starting at the base of the. To secure the roof valley flashing nail it down carefully. One layer of shingles actually crosses the valley beneath the other.

Cut the tabs off of one shingle and lay it on the bottom edge with a 1 4 inch overhang. In addition it is important to avoid nailing the shingles through the valley metal. Gaf mastering the roof chapter 12 this video demonstrates the proper installation technique for installing roofing valleys. 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.

Ensure ice and water protector has been installed along the valley first. Measure the width of the sheet metal valley flashing. Shingles from the other side are run through the valley center line and cut along a line parallel to and 4 cm from the center line.