To secure the roof valley flashing nail it down carefully.
How to paper a roof valley.
Felt paper should extend at least 10 inches up each side of the roof valley so use a strip between 20 and 24 inches wide.
Shingle the other side of the valley the same way.
Only nail at the edges with only enough nails to.
Roof one side of the valley running the shingles across it.
Stop nailing 6 inches from the center.
Use a utility knife to trim all excess paper on the last pass.
This video is about how to install peel n stick in valley.
Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.
Remember to always overlap roof paper at valley ridges and hips by six inches.
You can center it and align it smoothly with the roof contours as you go down.
Then starting at the base of the.
Lay one and two tab shingles as you near the valley so full size shingles will run across the valley.
Cut a slit from the side of a paper roll to accommodate vent pipes.