Place a piece of sheet metal under the shingles to make sure you will not damage the flashing.
Shingle roof valley installation.
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.
Snipping off the corners of.
Only nail at the edges with only enough nails to.
Then starting at the base of the.
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.
To secure the roof valley flashing nail it down carefully.
This video demonstrates the proper installation technique for installing roofing valleys.
Some roofers cut the shingles parallel to the flashing s center ridge.
Others start with a 3 inch wide.