Installing Valley Roof Flashing

Recommended procedures of basic valley flashing installation.

Installing valley roof flashing.

Using clips permits movement in the valley as temperatures change. 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. Snipping off the corners of. Place a piece of sheet metal under the shingles to make sure you will not damage the flashing.

Remember to caulk the underside of the flashing with a sealant. Trim as needed with your tin snips. Others start with a 3 inch wide. 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.

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. Flashing is generally installed at any joints or edges in the roof where water could otherwise work its way in. How to do it determine cuts. Step 6 install the flashing.

Use roof valley cleats at intervals of 24 o c. Cut the bottom edge and fold it down over the drip edge. You can choose from v or w shaped types of flashing. The edge of the roof has thin metal flashing that helps water drip off.

To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch. Fold the top of the flashing over the ridge. Install the underlayment as directed by the manufacturer then set the valley flashing on top of it. When you lay the flashing down make sure it is flush with the drip edges at the bottom of the valley.

Some roofers cut the shingles parallel to the flashing s center ridge. Typically flashing is installed using roofing nails and roofing cement. Install an underlayment centered in the roof valley. Make sure to cover the gap at the bottom of the raised ridge.

Now nail this first flashing at both its far ends. Open valleys have metal flashing to protect this critical area of the roof. 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. In this video i show you how i do the valleys on a shingle roof.

Drip edge metal valley flashing dormer chimney and kickout flashing are types of roof flashing that shed water away from the connections between roofs walls chimneys and other building assemblies. While some skylight manufacturers include flashing in their products sometimes roofing professionals.