For example in metal roofing systems valleys are commonly fabricated with hems but can also be fabricated without them in which case they could still be used for metal roofing or any other type of roofing.
Roof metal or shingle valleys.
Some homeowners prefer the consistent look that a woven valley provides.
With an open valley a strip of metal will be visible on the roof wherever two opposing roof planes meet.
Essentially there are three main ways to shingle a roof valley.
An improper installed valley can be the cause of serious leaks.
Valleys are a very important part of a well designed roofing system.
The three methods to shingle a roof valley.
When all roof components are performing well a roof s lifespan is more likely to be maximized.
In most cases a metal valley will add durability and longevity to any roofing system.
The valley is one of the most critical details on the roof because it collects a lot of water.
Roofing shingles are installed then cut and sealed where they overlap the metal channel.
It is made of galvanized steel and will not rust.
The metal is usually pre painted to best complement the shingles color blend.
Woven valley shingle installation.
In addition it is important to avoid nailing the shingles through the valley metal.
Unlikely but it can.
Metal valley will last forever.
For an open valley a sheet of metal usually steel sometimes copper is fastened to the roof deck.
The shingles are then cut out of the valley area opening the surface of the valley lining to water run off and the environment.
To achieve a woven valley installation a roofing professional lays shingles in the valley and weaves them together.
As a single component in the entire system a metal valley effectively protects other parts of your roof including shingles roof felt and the roof deck.
Woven closed cut and open.
These items can be fabricated in many different profiles.
However the hole that is created from the nail may eventually leak.