Installing Flashing On A Roof Valley

Install the underlayment as directed by the manufacturer then set the valley flashing on top of it.

Installing flashing on a roof valley.

Many roofers cut the shingles across because they say it s safer. 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. Make sure to cover the gap at the bottom of the raised ridge. Step 6 install the flashing.

Especially if you live in an area that gets a lot of snow and ice. Place a piece of sheet metal under the shingles to make sure you will not damage the flashing. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch. The flashing shall be a minimum of 4 inches 102 mm high and 4 inches 102 mm wide.

Snipping off the corners of. Fold the top of the flashing over the ridge. When you install roof flashing you will need to use a sealant. For the valley areas of the roof you will be using valley flashing.

Typically flashing is installed using roofing nails and roofing cement. How to do it determine cuts. Remember to caulk the underside of the flashing with a sealant. Two ways to flash roof edges.

Recommended procedures of basic valley flashing installation. While roofing professionals occasionally use nails when flashing they must choose whether to nail to the roof plane or the vertical wall. Details concrete masonry roofing wrb flashing. 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.

At the end of the vertical sidewall the step flashing shall be turned out in a manner that directs water away from the wall and onto the roof and or gutter while this is a nice diagram of how these flashings work don t forget our 5 th design rule. One common method is to lay the edge metal under the eaves membrane and over the rake. Now nail this first flashing at both its far ends. Apply an approximately 3 inch.

No one of this affirmat. Cut the bottom edge and fold it down over the drip edge. Flashing is generally installed at any joints or edges in the roof where water could otherwise work its way in. Some roofers cut the shingles parallel to the flashing s center ridge.

Install an underlayment centered in the roof valley. In this video i show you how i do the valleys on a shingle roof. Before you apply the flashing you ll need to lay down a waterproof membrane.