How To Install Metal Roof Valley Flashing

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How to install metal roof valley flashing.

Use 1 inch galvanized roofing nails. 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. 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.

Recommended procedures of basic valley flashing installation. In this video i show you how i do the valleys on a shingle roof. 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. Use fasteners to attach the panel to the structure making sure that there is complete compression of the sealant.

The top joinery of both valleys when they meet on the same plane of roof is shown here. Attach the flashing panel in place at the bottom. Apply an approximately 3 inch. Fold the top of the flashing over the ridge.

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. Place a piece of sheet metal under the shingles to make sure you will not damage the flashing. Some roofers cut the shingles parallel to the flashing s center ridge.

I have my valley custom made with water trough to help with leaking b. 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. Remember to caulk the underside of the flashing with a sealant.

Snipping off the corners of. How to do it determine cuts. Many roofers cut the shingles across because they say it s safer. Step 6 install the flashing.

Now nail this first flashing at both its far ends.