Installing Flashing On A Roof Valley

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 flashing on a roof valley.

Two ways to flash roof edges. Typically flashing is installed using roofing nails and roofing cement. Step 6 install the flashing. Some roofers cut the shingles parallel to the flashing s center ridge.

Install an underlayment centered in the roof valley. Install the underlayment as directed by the manufacturer then set the valley flashing on top of it. In this video i show you how i do the valleys on a shingle roof. While roofing professionals occasionally use nails when flashing they must choose whether to nail to the roof plane or the vertical wall.

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. For the valley areas of the roof you will be using valley flashing. Now nail this first flashing at both its far ends. The flashing shall be a minimum of 4 inches 102 mm high and 4 inches 102 mm wide.

Many roofers cut the shingles across because they say it s safer. Especially if you live in an area that gets a lot of snow and ice. Remember to caulk the underside of the flashing with a sealant. 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. Fold the top of the flashing over the ridge. Others start with a 3 inch wide. Details concrete masonry roofing wrb flashing.

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. Cut the bottom edge and fold it down over the drip edge. Recommended procedures of basic valley flashing installation.

Before you apply the flashing you ll need to lay down a waterproof membrane. Snipping off the corners of. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch. Make sure to cover the gap at the bottom of the raised ridge.

When you install roof flashing you will need to use a sealant. Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing. Apply an approximately 3 inch.