Installing Flashing On A Roof Valley

Especially if you live in an area that gets a lot of snow and ice.

Installing flashing on a roof valley.

Details concrete masonry roofing wrb flashing. Others start with a 3 inch wide. Some roofers cut the shingles parallel to the flashing s center ridge. Apply an approximately 3 inch.

How to do it determine cuts. Install an underlayment centered in the roof valley. In this video i show you how i do the valleys on a shingle roof. Typically flashing is installed using roofing nails and roofing cement.

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. Fold the top of the flashing over the ridge. 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. For the valley areas of the roof you will be using valley flashing. 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.

To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch. Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge 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. Make sure to cover the gap at the bottom of the raised ridge.

The flashing shall be a minimum of 4 inches 102 mm high and 4 inches 102 mm wide. 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. Now nail this first flashing at both its far ends. Many roofers cut the shingles across because they say it s safer.

Remember to caulk the underside of the flashing with a sealant. Snipping off the corners of. Step 6 install the flashing. When you install roof flashing you will need to use a sealant.

Install the underlayment as directed by the manufacturer then set the valley flashing on top of it. Before you apply the flashing you ll need to lay down a waterproof membrane. No one of this affirmat.