How To Install Flashing On A Roof Valley

How to do it determine cuts.

How to install flashing on a roof valley.

Step flashing protects the gap where roofs meet walls by weaving into the roof shingles. Install the underlayment as directed by the manufacturer then set the valley flashing on top of it. Snipping off the corners of. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch.

Flashing is generally installed at any joints or edges in the roof where water could otherwise work its way in. Typically flashing is installed using roofing nails and roofing cement. 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. Others start with a 3 inch wide.

Now nail this first flashing at both its far ends. Rain should run off the roof and into the gutter. At the bottom of the roof water needs to be directed. Remember to caulk the underside of the flashing with a sealant.

Install an underlayment centered in the roof valley. Recommended procedures of basic valley flashing installation. 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. Use fasteners to attach the panel to the structure making sure that there is complete compression of the sealant.

Fold the top of the flashing over the ridge. Apply an approximately 3 inch. Many roofers cut the shingles across because they say it s safer. When you lay the flashing down make sure it is flush with the drip edges at the bottom of the valley.

In this video i show you how i do the valleys on a shingle roof. Cut the bottom edge and fold it down over the drip edge. Place a piece of sheet metal under the shingles to make sure you will not damage the flashing. 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. 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. You can choose from v or w shaped types of flashing. Some roofers cut the shingles parallel to the flashing s center ridge.