How To Install Valley Flashing On Tile Roof

I have my valley custom made with water trough to help with leaking b.

How to install valley flashing on tile roof.

The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak. Lap successive sheets of metal flashing a minimum of 12 inches and seal laps. Then install a non corrosive metal valley flashing of 24 minimum width. Install an underlayment centered in the roof valley.

Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic. 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. Roof one side of the valley running the shingles across it.

Installing a tile roof can be a difficult and laborious process. Closed valleys or open valleys. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. 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.

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. There are two common methods for completing the flashing of a valley in a shingle roof system. Shingle the other side of the valley the same way. To understand what makes a valley either closed or open it is important to understand how a valley is constructed.

Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. One of the details that varies between homes is the method of flashing the valley areas of the roof. A project of this size will take a great deal of planning and preparation well before the actual tile installation is underway.

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. 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.