Installing Valley Flashing On Existing Roof

Now nail this first flashing at both its far ends.

Installing valley flashing on existing roof.

Remember to caulk the underside of the flashing with a sealant. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. No one of this affirmat.

Lay the flashing in a way that an inch of the flashing protrudes over the edge of the upper flange of the batten. Step 3 install the flashing. Install flashing on existing roof to extend the lifespan of your roof. 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.

Roof one side of the valley running the shingles across it. Install the valley battens on the sides of the roof that you want to place the valley flashing. Shingle the other side of the valley the same way. In this video i show you how i do the valleys on a shingle roof.

Apply an approximately 3 inch. Many roofers cut the shingles across because they say it s safer. Install an underlayment centered in the roof valley. 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.

Stop nailing 6 inches from the center. Place the flashing on the upper portion or the upper flange of the batten. Recommended procedures of basic valley flashing installation.