How To Install Flashing On A Roof Valley

Flashing is generally installed at any joints or edges in the roof where water could otherwise work its way in.

How to install flashing on a roof valley. Snipping off the corners of. Use fasteners to attach the panel to the structure making sure that there is complete compression of the sealant. Trim as needed with your tin snips. When you lay the flashing down make sure it is flush with the drip edges at the bottom of the valley.

How to do it determine cuts. Install the underlayment as directed by the manufacturer then set the valley flashing on top of it. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch. Apply an approximately 3 inch.

Place a piece of sheet metal under the shingles to make sure you will not damage the flashing. Step flashing protects the gap where roofs meet walls by weaving into the roof shingles. 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. 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.

Use tape sealant between the valley trim and the panel. 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 an underlayment centered in the roof valley. In order to properly install new flashing you ll have to remove the shingles surrounding your old flashing and then re lay them after installation.

You can choose from v or w shaped types of flashing. Many roofers cut the shingles across because they say it s safer. Fold the top of the flashing over the ridge. Some roofers cut the shingles parallel to the flashing s center ridge.

No one of this affirmat. In this video i show you how i do the valleys on a shingle roof. Recommended procedures of basic valley flashing installation. Cut the bottom edge and fold it down over the drip edge.

Make sure to cover the gap at the bottom of the raised ridge. Remember to caulk the underside of the flashing with a sealant. At the bottom of the roof water needs to be directed. Rain should run off the roof and into the gutter.