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.

Installing valley roof flashing.

Install an underlayment centered in the roof valley. 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. 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. Recommended procedures of basic valley flashing installation.

Others start with a 3 inch wide. Using clips permits movement in the valley as temperatures change. Typically flashing is installed using roofing nails and roofing cement. Fold the top of the flashing over the ridge.

Snipping off the corners of. Many roofers cut the shingles across because they say it s safer. 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.

How to do it determine cuts. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch. No one of this affirmat. Cut the bottom edge and fold it down over the drip edge.

While some skylight manufacturers include flashing in their products sometimes roofing professionals. Trim as needed with your tin snips. Open valleys have metal flashing to protect this critical area of the roof. 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. Now nail this first flashing at both its far ends.

Flashing is generally installed at any joints or edges in the roof where water could otherwise work its way in. 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. The edge of the roof has thin metal flashing that helps water drip off. Remember to caulk the underside of the flashing with a sealant.

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.