How To Install Metal Roof Valley Flashing

Use 1 inch galvanized roofing nails.

How to install metal roof valley flashing.

Lay the flashing down in the roof valley and start at the lower end of the roof. Now nail this first flashing at both its far ends. Use fasteners to attach the panel to the structure making sure that there is complete compression of the sealant. Some roofers cut the shingles parallel to the flashing s center ridge.

How to do it determine cuts. Place a piece of sheet metal under the shingles to make sure you will not damage the flashing. Others start with a 3 inch wide. Attach the flashing panel in place at the bottom.

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. Many roofers cut the shingles across because they say it s safer. The top joinery of both valleys when they meet on the same plane of roof is shown here.

In this video i show you how i do the valleys on a shingle roof. 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. Make sure to cover the gap at the bottom of the raised ridge. Install an underlayment centered in the roof valley.

Apply an approximately 3 inch. Use tape sealant between the valley trim and the panel. No one of this affirmat. Make sure that the end of the flashing panel is perfectly in line with the edge of the roof.

Cut the bottom edge and fold it down over the drip edge. Recommended procedures of basic valley flashing installation. Snipping off the corners of. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch.

Steep slope roofs slope greater than 3 12 cut the panels at an angle for the valley then bend the hem end of the panel and hook it with a cleat.