In addition it is important to avoid nailing the shingles through the valley metal.
Roof metal or shingle valleys.
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 valley shingle installation.
The three methods to shingle a roof valley.
Whether for slate shingle or metal roofing valley flashing adds detail and helps to direct water.
Essentially there are three main ways to shingle a roof valley.
Unlikely but it can.
The shingles are then cut out of the valley area opening the surface of the valley lining to water run off and the environment.
An improper installed valley can be the cause of serious leaks.
A chalk line is then used to strike a line from the top of the valley to the bottom of the valley.
Shingles in the valley will not last forever and will have to be replaces during a re roof project but the nails will not leak.
However the hole that is created from the nail may eventually leak.
Metal valley will last forever.
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.
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.
Woven closed cut and open.
Valleys are a very important part of a well designed roofing system.
These items can be fabricated in many different profiles.
Some homeowners prefer the consistent look that a woven valley provides.
The metal is usually pre painted to best complement the shingles color blend.
It is made of galvanized steel and will not rust.
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.