How To Install Valley Flashing To An Existing Roof

Iko recommends that you install architectural shingles with the open valley method for the best roof performance.

How to install valley flashing to an existing roof.

Install an underlayment centered in the roof valley. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. To level out an existing asphalt shingle roof rip down reduce the height of two courses of shingles as shown in the drawing below. In this video i show you how i do the valleys on a shingle roof.

When deciding how to shingle a roof valley you will need to consider your materials the climate and the desired look of the roof. Along the rakes install a new j channel drip edge which wraps around the old rake flashing and starter courses. Step flashing built to protect joints between roofs chimneys and other objects like skylights this flashing steps up above the shingles and attaches to the object providing comprehensive water protection. This recommendation includes iko s premium shingles.

Recommended procedures of basic valley flashing installation. Lap successive sheets of metal flashing a minimum of 12 inches and seal laps. Install the underlayment as directed by the manufacturer then set the valley flashing on top of it. No one of this affirmat.

Flashing can be purchased in pre formed styles to help you install it more easily and these include. Especially if you live in an area that gets a lot of snow and ice. The three methods to shingle a roof valley. Many roofers cut the shingles across because they say it s safer.

The top joinery of both valleys when they meet on the same plane of roof is shown here. Drip edge metal valley flashing dormer chimney and kickout flashing are types of roof flashing that shed water away from the connections between roofs walls chimneys and other building assemblies. W type valley flashing is more rigid for handling so it stays straight and it stops waler rushing down one side of a roof from rushing back up the other side. I have my valley custom made with water trough to help with leaking b.

For the valley areas of the roof you will be using valley flashing. Vent pipe flashing as the name implies this flashing is usually.