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.

Use 1 inch galvanized roofing nails. Snipping off the corners of. Use fasteners to attach the panel to the structure making sure that there is complete compression of the sealant. I have my valley custom made with water trough to help with leaking b.

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. Others start with a 3 inch wide. Apply an approximately 3 inch. Recommended procedures of basic valley flashing installation.

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 that the end of the flashing panel is perfectly in line with the edge of the roof. Some roofers cut the shingles parallel to the flashing s center ridge. In this video i show you how i do the valleys on a shingle roof.

Remember to caulk the underside of the flashing with a sealant. Install an underlayment centered in the roof valley. Step 6 install the flashing. How to do it determine cuts.

Lay the flashing down in the roof valley and start at the lower end of the roof. No one of this affirmat. Fold the top of the flashing over the ridge. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch.

Cut the bottom edge and fold it down over the drip edge. Now nail this first flashing at both its far ends. Many roofers cut the shingles across because they say it s safer. Attach the flashing panel in place at the bottom.

The top joinery of both valleys when they meet on the same plane of roof is shown here.