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.
Some homeowners prefer the consistent look that a woven valley provides.
Roof valleys are troughs that discard runoff water where two sections of sloped roof meet.
Woven valley shingle installation.
On the common rafters the plumb cut is marked with a framing square for a 12 in 12 pitch 45 and cut square i e no bevel.
The valleys on many older houses comprise layers of roofing paper which can deteriorate over time.
To achieve a woven valley installation a roofing professional lays shingles in the valley and weaves them together.
Cut it to fit your roof if.