Installing Valley Flashing On Existing Roof

A batten is a roofing component made of a thin layer of metal plastic or wood and is used as a fixing point for roof tiles and roofing sheets.

Installing valley flashing on existing roof.

Install flashing on existing roof to extend the lifespan of your roof. Many roofers cut the shingles across because they say it s safer. Install valley battens on both ends of the roof valley then attach first flashing 3 4 inches over the roof flange and another 3 4 inches over the fascia if any is present. Finally reattach all shingles removed in the process.

Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. Roof one side of the valley running the shingles across it. Stop nailing 6 inches from the center. Lay the flashing in a way that an inch of the flashing protrudes over the edge of the upper flange of the batten.

Install an underlayment centered in the roof valley. Install the valley battens on the sides of the roof that you want to place the valley flashing. In this video i show you how i do the valleys on a shingle roof. Recommended procedures of basic valley flashing installation.

Remember to caulk the underside of the flashing with a sealant. Then install a non corrosive metal valley flashing of 24 minimum width lap successive sheets of metal flashing a minimum of 12 inches and seal laps. No one of this affirmat. Use roofing nails to install the l shaped flashing flush with the roof and wall then cover it with roofing cement and reattach the roofer s felt.

Apply an approximately 3 inch. Shingle the other side of the valley the same way. Place the flashing on the upper portion or the upper flange of the batten.