How To Roof A Closed Valley

The closed variation is a flashing that has been completely covered with shingles while in the open variation will have the flashing completely exposed to the elements.

How to roof a closed valley. Plus cutting the closed cut valley shingles can happen after the rest of the roof is shingled. 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. Open valleys and closed valleys. One layer of shingles actually crosses the valley beneath the other.

Closed cut valleys also called closed valleys are installed quickly and have a cleaner sharper look than woven valleys. One of the details that varies between homes is the method of flashing the valley areas of the roof. Because of the sheer amount of water being navigated through this section your valleys need to be properly sealed. Usually there s a self adhering ice and water shield or a second underlayment installed that covers the other parts of the roof that the initial underlayment can t cover.

Shingles from the other side are run through the valley center line and cut along a line parallel to and 4 cm from the center line. With a closed cut valley there s no need to shingle the two roof planes at the same time. There are two common methods for completing the flashing of a valley in a shingle roof system. Prior to installation the underlayment is installed over the entire roof deck.

I begin the second side. From the ground it looks as though the shingles meet in a clean line in the center of the valley. Closed valleys or open valleys. To understand what makes a valley either closed or open it is important to understand how a valley is constructed.

For closed cut valleys shingles on one roof plane are installed through a valley and extended at least 30 cm into the intersecting plane. Closed cut valley even if i work toward the valley with three tab shingles cut valleys are faster than woven valleys hands down. Find out the differences before you talk to a roofing expert.