With a closed cut valley there s no need to shingle the two roof planes at the same time.
Open cut valley roofing.
Essentially there are three main ways to shingle a roof valley.
Roofing shingles are installed then cut and sealed where they overlap the metal channel.
There are 4 main kinds of valley installation methods to explore for your roof.
In this video we explore the california cut woven closed cut and open metal.
When to choose a closed valley over an open valley.
The shingles are then cut out of the valley area opening the surface of the valley lining to water run off and the environment.
We describe how to construct three common styles of roof valley.
Woven closed cut and open.
Your choice of valley installation method is critical because when improperly installed valleys are risks for serious leaks.
I begin the second side the side that will be cut by snapping a cutline 2 in.
This article series discusses best practices in the selection and installation of residential roofing.
For an open valley a sheet of metal usually steel sometimes copper is fastened to the roof deck.
Although the open valley is recommended by the manufacturer closed valley is acceptable.
Fold the top over the roof ridge and cut the bottom along the drip edge metal.
Open valley closed cut valley and woven roof valley and we include roof valley underlayment and nailing specifications.
We don t normally offer this line although it is available.
Plus cutting the closed cut valley shingles can happen after the rest of the roof is shingled.
The metal is usually pre painted to best complement the shingles color blend.
People working on your roof especially less skilled trades or homeowners invariably use the valleys to walk on.
Repairs to closed valleys are a lot more involved than working on an open valley as is re roofing or making changes to a portion of your roof in the future.
From the valley center.
With a clean valley you can lay down some peel and stick roofing membrane.
It is always a good idea to check with the manufacturer or a certified installer of the product such as ourselves.
The only type of valley that is unacceptable is the woven valley.
Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing.
Open valleys may be susceptible to water backup if the cut off shingles are not properly trimmed potentially causing roof leaks.
A roof valley is formed where two roof slopes meet.
Closed valleys are very vulnerable to mechanical damage.
