No Cut Valley Roofing

With a closed cut valley there s no need to shingle the two roof planes at the same time.

No cut valley roofing.

I begin the second side the side that will be cut by snapping a cutline 2 in. Any one have experience with no cut valleys speed valley long island valley or california valley in the north sates such as north iowa to minnesota with steep roofs more like 14 12 the valley i refer to is this htt hellip. From the valley center. In general the closed cut valley method implies stretching one side of the shingles beyond the valley while those on the other side are trimmed.

It installs and looks almost the same as a regular cut valley where the shingles on the low volume roof plane are installed first and pass through the center of the valley by at least 12 in. A type of cut valley common in many places appears cut but it s not. If you go with closed valley require it be cut at the valley centerline some roofers push a couple of inches past the centerline so there is an extra layer in the valley bottom during low runoff flow but it leaves an underlapping edge with the 2 inch runup on the other side that water and debris pile up against and the water has no choice but to go under starting rot immediately down the center of the valley. It is essential to only use whole not cut shingles during this step.

The shingles are then cut out of the valley area opening the surface of the valley lining to water run off and the environment. A chalk line is then used to strike a line from the top of the valley to the bottom of the valley. With the california cut valley shingles from the smaller roof slope are installed across the valley onto the adjacent slope. With an open valley a strip of metal will be visible on the roof wherever two opposing roof planes meet.

In my opinion no cut valleys are fast to install water resistant and beautiful. Plus cutting the closed cut valley shingles can happen after the rest of the roof is shingled. It is popular because the two roof planes do not need to be shingled at the same time. As you install roof shingles on the second roof plane you allow them to lap over the valley on top of the first shingles.

A valley shingle is then installed parallel to the centerline and offset a couple of inches.