Installing Valley Roof Flashing

Using clips permits movement in the valley as temperatures change.

Installing valley roof flashing.

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. Fold the top of the flashing over the ridge. Cut the bottom edge and fold it down over the drip edge. When you lay the flashing down make sure it is flush with the drip edges at the bottom of the valley.

The installer fabricates simple clips or valley flashing cleats whose bent edge interlocks with the folded over or hemmed edges of the metal roof valley flashing to secure the valley to the roof deck. Use roof valley cleats at intervals of 24 o c. Install the underlayment as directed by the manufacturer then set the valley flashing on top of it. Apply an approximately 3 inch.

Step 6 install the flashing. 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. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch.

Place a piece of sheet metal under the shingles to make sure you will not damage the flashing. Install an underlayment centered in the roof valley. The edge of the roof has thin metal flashing that helps water drip off. Make sure to cover the gap at the bottom of the raised ridge.

Many roofers cut the shingles across because they say it s safer. Others start with a 3 inch wide. Open valleys have metal flashing to protect this critical area of the roof. 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. Now nail this first flashing at both its far ends. While some skylight manufacturers include flashing in their products sometimes roofing professionals. 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. Flashing is generally installed at any joints or edges in the roof where water could otherwise work its way in. Trim as needed with your tin snips. No one of this affirmat.

Remember to caulk the underside of the flashing with a sealant. Snipping off the corners of.