How To Install Metal Roof Valley Flashing

Remember to caulk the underside of the flashing with a sealant.

How to install metal roof valley flashing.

Use tape sealant between the valley trim and the panel. Place a piece of sheet metal under the shingles to make sure you will not damage the flashing. No one of this affirmat. The top joinery of both valleys when they meet on the same plane of roof is shown here.

Make sure to cover the gap at the bottom of the raised ridge. Some roofers cut the shingles parallel to the flashing s center ridge. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch. Many roofers cut the shingles across because they say it s safer.

Install an underlayment centered in the roof valley. Now nail this first flashing at both its far ends. Cut the bottom edge and fold it down over the drip edge. Use fasteners to attach the panel to the structure making sure that there is complete compression of the sealant.

Use 1 inch galvanized roofing nails. Lay the flashing down in the roof valley and start at the lower end of the roof. 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. Others start with a 3 inch wide.

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 that the end of the flashing panel is perfectly in line with the edge of the roof. Attach the flashing panel in place at the bottom. How to do it determine cuts.

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. Recommended procedures of basic valley flashing installation. Snipping off the corners of. Step 6 install the flashing.

Fold the top of the flashing over the ridge.