How To Install Metal Flashing Roof Valley

Fold the top over the roof ridge and cut the bottom along the drip edge metal.

How to install metal flashing roof valley.

Remember to caulk the underside of the flashing with a sealant. With a clean valley you can lay down some peel and stick roofing membrane. Use fasteners to attach the panel to the structure making sure that there is complete compression of the sealant. Step 6 install the flashing.

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. Install synthetic roofing. The top joinery of both valleys when they meet on the same plane of roof is shown here. Lay the flashing down in the roof valley and start at the lower end of the roof.

Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. 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. Apply an approximately 3 inch. Use 1 inch galvanized roofing nails.

First clean the debris out of the valley including sawdust nails and whatever else is in there. Shingle the other side of the valley the same way. Recommended procedures of basic valley flashing installation. 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. Make sure that the end of the flashing panel is perfectly in line with the edge of the roof. I have my valley custom made with water trough to help with leaking b. Stop nailing 6 inches from the center.

Attach the flashing panel in place at the bottom. Install an underlayment centered in the roof valley.