How To Install Metal Roof Valley Flashing

Make sure to cover the gap at the bottom of the raised ridge.

How to install metal roof valley flashing.

I have my valley custom made with water trough to help with leaking b. Cut the bottom edge and fold it down over the drip edge. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch. The top joinery of both valleys when they meet on the same plane of roof is shown here.

Snipping off the corners of. Recommended procedures of basic valley flashing installation. In this video i show you how i do the valleys on a shingle roof. Some roofers cut the shingles parallel to the flashing s center ridge.

Apply an approximately 3 inch. Others start with a 3 inch wide. Many roofers cut the shingles across because they say it s safer. Use tape sealant between the valley trim and the panel.

Use 1 inch galvanized roofing nails. 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. Step 6 install the flashing. Make sure that the end of the flashing panel is perfectly in line with the edge of the roof.

Use fasteners to attach the panel to the structure making sure that there is complete compression of the sealant. Install an underlayment centered in the roof valley. Lay the flashing down in the roof valley and start at the lower end of the roof. Fold the top of the flashing over the 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. Attach the flashing panel in place at the bottom. 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. Place a piece of sheet metal under the shingles to make sure you will not damage the flashing.

Now nail this first flashing at both its far ends.