The metal valley is installed on top of the ice and water shield and creates a highly effective barrier and passageway to keep your roof dry and protected.
Valley metal on roof.
Fasteners placed in the exposed center area.
Roof mastic applied along sides of valley flashing.
No sales pitch or other fluff.
Fold the top over the roof ridge and cut the bottom along the drip edge metal.
Use fasteners to attach the panel to the structure making sure that there is complete compression of the sealant.
Whether for slate shingle or metal roofing valley flashing adds detail and helps to direct water.
With a clean valley you can lay down some peel and stick roofing membrane.
That flashing is left exposed so the roof has visible lines of metal running down the valley.
An open valley relies on metal flashing for protection.
Low slope roofs slope less than 3 12 use tape sealant between the valley trim and the panel.
Some homeowners do not like the look of open valleys while others feel the metal accentuates the roof s shape particularly if copper or painted flashing is used.
Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing.
Open valleys on the other hand leave the metal exposed which may be more pleasing to the eye especially if copper is used as the valley lining.
Punctures in the center of the valley.
Failure to extend the entire width of the metal valley flashing beyond the eave of the roof.
For an open valley a sheet of metal usually steel sometimes copper is fastened to the roof deck.
Avoid the following common errors.
Roofing shingles are installed then cut and sealed where they overlap the metal channel.
Closed cut valley fully replaced with new metal valley flashing.
This will reduce the installed cost of the project.
The metal is usually pre painted to best complement the shingles color blend.
These items can be fabricated in many different profiles.
How to seal metal roof valley.
Best practices for sealing the metal roof valley vary based on the slope of the roof.
Why is a metal valley important while there are a number of materials that can be used in roof valleys metal provides the most durable longest lasting solution.
Valleys are a very important part of a well designed roofing system.