How To Install Valley Flashing On Tile Roof

Above our photo of an open valley on a clay tile roof demonstrates how a snow guard can block drainage of a roof valley leading to debris clogging.

How to install valley flashing on tile roof.

A project of this size will take a great deal of planning and preparation well before the actual tile installation is underway. One of the details that varies between homes is the method of flashing the valley areas of the roof. Then install a non corrosive metal valley flashing of 24 minimum width. Roof one side of the valley running the shingles across it.

Whether you are laying brand new roofing tile or replacing damaged ones it is also important to have the right technique. Closed valleys or open valleys. Open valleys have metal flashing to protect this critical area of the roof. Lap successive sheets of metal flashing a minimum of 12 inches and seal laps.

Shingle the other side of the valley the same way. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Installing a tile roof can be a difficult and laborious process. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately.

Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. Stop nailing 6 inches from the center. The top joinery of both valleys when they meet on the same plane of roof is shown here. There are two common methods for completing the flashing of a valley in a shingle roof system.

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. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. From drip edge to valley flashing december 25 2018 drip edge metal valley flashing dormer chimney and kick out flashing shed water away from the connections between roofs walls chimneys and other building assemblies. To understand what makes a valley either closed or open it is important to understand how a valley is constructed.

The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak. Click to enlarge any image the valley flashing for a tile roof should have hemmed edges and be installed with cleats that allow individual sections to expand and contract figure 2 34.