Step 6 shingle valley.
How to shingle a valley roof.
Secure all of the 3 tab shingles to the roof plane with the 1 inch roofing nails using the local building codes as a placement guide except for the shingles covering the flashing material.
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.
The open woven and closed cut methods are demonstrated.
Continue until you reach the top edge of the valley roof.
The next shingle should be directly atop the first one.
From this starter shingle continue moving up the valley roof.
Valleys are a prime leak area so it s important to be careful.
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.
Each successive shingle should be then placed with a six inch overlap or until the adhesive strip contacts the bottom of the shingle tabs.
In order to shingle this kind of roof valley a roofing professional has to install both roof faces at the same time which is quite slow.
A woven valley shingle installation has other drawbacks including that they are slow to install especially in cold weather and more difficult to repair than the other types.