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.

Whether you are laying brand new roofing tile or replacing damaged ones it is also important to have the right technique. Stop nailing 6 inches from the center. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. Shingle the other side of the valley the same way.

Install an underlayment centered in the roof valley. 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. Installing a tile roof can be a difficult and laborious process. Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic.

A project of this size will take a great deal of planning and preparation well before the actual tile installation is underway. Closed valleys or open valleys. Roof one side of the valley running the shingles across it. The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak.

Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. Open valleys have metal flashing to protect this critical area of the roof. 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.

One of the details that varies between homes is the method of flashing the valley areas of the roof. To understand what makes a valley either closed or open it is important to understand how a valley is constructed. 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. 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.

While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately. Lap successive sheets of metal flashing a minimum of 12 inches and seal laps.