Installing Flashing On A Roof Valley

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.

Installing flashing on a roof valley.

Especially if you live in an area that gets a lot of snow and ice. 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. Apply an approximately 3 inch. Snipping off the corners of.

Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing. Install an underlayment centered in the roof valley. When you install roof flashing you will need to use a sealant. Two ways to flash roof edges.

Make sure to cover the gap at the bottom of the raised ridge. Details concrete masonry roofing wrb flashing. Before you apply the flashing you ll need to lay down a waterproof membrane. Others start with a 3 inch wide.

Remember to caulk the underside of the flashing with a sealant. 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. 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. Place a piece of sheet metal under the shingles to make sure you will not damage the flashing. Typically flashing is installed using roofing nails and roofing cement. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch.

Now nail this first flashing at both its far ends. In this video i show you how i do the valleys on a shingle roof. Fold the top of the flashing over the ridge. No one of this affirmat.

Recommended procedures of basic valley flashing installation. Step 6 install the flashing. Some roofers cut the shingles parallel to the flashing s center ridge. 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.

While roofing professionals occasionally use nails when flashing they must choose whether to nail to the roof plane or the vertical wall. How to do it determine cuts. For the valley areas of the roof you will be using valley flashing.