Begin your first row of tar paper with the bottom of the tar paper slightly hanging over the edge of the roof.
Papering a roof valley.
The valleys on many older houses comprise layers of roofing paper which can deteriorate over time.
Roll out the tar paper along the bottom edge of the roof.
Roof valleys are troughs that discard runoff water where two sections of sloped roof meet.
Woven valley shingle installation.
The valley rafter is marked for a 12 in 17 pitch and then cut with a double bevel to fit into the ridge intersection.
The three methods to shingle a roof valley.
Cut it to fit your roof if.