According to long time iko sales representative jeff tessaro closed valleys for residential construction have been popular since he was a roofing contractor in the late 90 s.
Woven closed valley roof.
Essentially there are three main ways to shingle a roof valley.
In this video we explore the california cut woven closed cut and open metal.
There are two common methods for completing the flashing of a valley in a shingle roof system.
One of the details that varies between homes is the method of flashing the valley areas of the roof.
Woven open and closed cut.
There are three common valley details.
We don t normally offer this line although it is available.
In addition there are recognized options for open and closed cut valleys commonly referred to as california open valleys and california closed cut valleys open valley.
Shingles are first installed on the side of the valley with a lower slope.
When it comes to your closed valley design there are a few options.
All of the shingle rows will need to be lined up correctly.
To understand what makes a valley either closed or open it is important to understand how a valley is constructed.
These disadvantages are neutralized by their simplicity of installation.
Here are diagrams of each style valley style.
Woven valleys should only be used with strip shingles.
For a closed valley shingles are installed across the joint where planes intersect.
The three basic valley types for asphalt shingle roof systems are woven open and closed cut.
This might lead to annoying leaks in heavy rains or at the very least a damaged roof underlayment.
There are various techniques you ll need to know for each type of installation which will be explained in this blog.
Woven closed cut and open.
There is a variation on the closed cut referred to as a california valley.
With each new course roofing shingles continue up the valley.
Pros of woven valley shingle installations.
Alternatives for the closed cut valley installation are the woven metal open cut and long island installation.
It is always a good idea to check with the manufacturer or a certified installer of the product such as ourselves.
Shingles are overlapped across the valley on alternative slopes.
The shingles act as the valley lining and protect the surface from water runoff.
A woven valley shingle installation is one where the shingles from both sides of the roof valley extend over the valley and weave together overlapping courses alternately.
Certainteed recommends closed valley for their lifetime landmarks and 25yr xt lines.
Before you decide how to shingle a roof valley you will need to consider your materials the climate and the desired look of the roof.
There are 4 main kinds of valley installation methods to explore for your roof.
The only type of valley that is unacceptable is the woven valley.
Closed valleys or open valleys.
