Roof valleys are troughs that discard runoff water where two sections of sloped roof meet.
Papering a roof valley.
The valleys on many older houses comprise layers of roofing paper which can deteriorate over time.
The three methods to shingle a roof valley.
To achieve a woven valley installation a roofing professional lays shingles in the valley and weaves them together.
The valley rafter is marked for a 12 in 17 pitch and then cut with a double bevel to fit into the ridge intersection.
Some homeowners prefer the consistent look that a woven valley provides.
Begin your first row of tar paper with the bottom of the tar paper slightly hanging over the edge of the roof.
Cut it to fit your roof if.