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