Types Of Roof Valley Flashing

If you are confused with all these valley style variations.

Types of roof valley flashing.

These are the key types of roof flashing you need to understand. Continuous flashing is also called apron flashing because it acts a lot like an apron. 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. Copper stainless steel lead and aluminum are the most common materials used.

Open valley closed cut valley and woven roof valley and we include roof valley underlayment and nailing specifications. This article discusses details and specifications for roof valley flashing for best construction roof leak resistance. Closed roof valleys though can still use metal valley flashing depending on the choice of shingles. Install an underlayment centered in the roof valley.

It is wise to choose flashing components that will have the same degree of longevity as the rest of your roof. In closed roof valleys the roofing shingles are continuous over the valley so that no flashing is visible. Valleys are those areas of the roof where two sections of roof meet at a joint and form an angled dip. This flashing comes in a v or w shape.

We describe how to construct three common styles of roof valley. Components such as pipe flashings for sewer vents that protrude through the roof valleys and ridges are available off the shelf in any of these materials. Lap successive sheets of metal flashing a minimum of 12 inches and seal laps. Recommended procedures of basic valley flashing installation.

Some roof features such as chimneys require two pieces of flashing. It runs all the way down to the drip edge which it should overlap slightly. Valleys are the number one area where shingles will erode and roof leaks will happen if valley flashing is not installed in them. Apply an approximately 3 inch.