How To Roof A Closed Valley

There are two common methods for completing the flashing of a valley in a shingle roof system.

How to roof a closed valley.

From the ground it looks as though the shingles meet in a clean line in the center of the valley. Prior to installation the underlayment is installed over the entire roof deck. For closed cut valleys shingles on one roof plane are installed through a valley and extended at least 30 cm into the intersecting plane. With a closed cut valley there s no need to shingle the two roof planes at the same time.

Closed cut valleys also called closed valleys are installed quickly and have a cleaner sharper look than woven valleys. If you have a shingled roof as most torontonians with a sloped roof tend to have then you will have one of two kinds of valleys on your home. There are two methods for sealing valleys. Open valleys and closed valleys.

Valleys are created where two roof slopes meet. Plus cutting the closed cut valley shingles can happen after the rest of the roof is shingled. One layer of shingles actually crosses the valley beneath the other. Because of the sheer amount of water being navigated through this section your valleys need to be properly sealed.

Find out the differences before you talk to a roofing expert. I begin the second side. To understand what makes a valley either closed or open it is important to understand how a valley is constructed. Closed valleys or open valleys.

Closed cut shingle valley installation. Closed cut valley even if i work toward the valley with three tab shingles cut valleys are faster than woven valleys hands down. One of the details that varies between homes is the method of flashing the valley areas of the roof.