How To Install Metal Roof Valley Flashing

Many roofers cut the shingles across because they say it s safer.

How to install metal roof valley flashing.

Cut the bottom edge and fold it down over the drip edge. The top joinery of both valleys when they meet on the same plane of roof is shown here. Install an underlayment centered in the roof valley. Apply an approximately 3 inch.

Place a piece of sheet metal under the shingles to make sure you will not damage the flashing. Use tape sealant between the valley trim and the panel. I have my valley custom made with water trough to help with leaking b. No one of this affirmat.

Step 6 install the flashing. 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. Use fasteners to attach the panel to the structure making sure that there is complete compression of the sealant.

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. 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. Lay the flashing down in the roof valley and start at the lower end of the roof. Others start with a 3 inch wide.

Use 1 inch galvanized roofing nails. Some roofers cut the shingles parallel to the flashing s center ridge. 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. Make sure to cover the gap at the bottom of the raised ridge.

In this video i show you how i do the valleys on a shingle roof. Recommended procedures of basic valley flashing installation. Attach the flashing panel in place at the bottom. Now nail this first flashing at both its far ends.

Fold the top of the flashing over the ridge.