Open Valley Roof Installation

How to do it determine cuts.

Open valley roof installation. Install an underlayment centered in the roof valley. In this video i show you how i do the valleys on a shingle roof. This allows water to fall from the higher slope to the lower slope and prevents it from going under the shingles to the roof deck. First clean the debris out of the valley including sawdust nails and whatever else is in there.

The open woven and closed cut methods are demonstrated. Shingles are cut on the higher slope in a straight line through the valley. Install synthetic roofing. With a clean valley you can lay down some peel and stick roofing membrane.

Recommended procedures of basic valley flashing installation. Ensure ice and water protector has been installed along the valley first. Fold the top over the roof ridge and cut the bottom along the drip edge metal. Then starting at the base of the.

Others start with a 3 inch wide. Pros of open valley shingle installation. Open valley shingle installation makes use of the metal flashing sheets that need to be installed so that they overlap each other by few inches with the upper piece of sheet is resting over the bottom piece. During its installation process the open valley shingle utilizes the w metal flashing which helps in preventing the water from rushing down.

Many roofers cut the shingles across because they say it s safer. Place a piece of sheet metal under the shingles to make sure you will not damage the flashing. Only nail at the edges with only enough nails to. Snipping off the corners of.

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. Some roofers cut the shingles parallel to the flashing s center ridge. When compared to a closed valley and open valley adds an additional layer of lining.