How To Roof A Closed Valley

Because of the sheer amount of water being navigated through this section your valleys need to be properly sealed.

How to roof a closed valley.

Closed cut shingle valley installation. Open valleys and closed valleys. Prior to installation the underlayment is installed over the entire roof deck. Closed cut valleys also called closed valleys are installed quickly and have a cleaner sharper look than woven valleys.

For closed cut valleys shingles on one roof plane are installed through a valley and extended at least 30 cm into the intersecting plane. Plus cutting the closed cut valley shingles can happen after the rest of the roof is shingled. Find out the differences before you talk to a roofing expert. There are two common methods for completing the flashing of a valley in a shingle roof system.

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. Closed valleys or open valleys. Valleys are created where two roof slopes meet. I begin the second side.

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. One of the details that varies between homes is the method of flashing the valley areas of the roof. There are two methods for sealing valleys. One layer of shingles actually crosses the valley beneath the other.

Closed cut valley even if i work toward the valley with three tab shingles cut valleys are faster than woven valleys hands down. 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. With a closed cut valley there s no need to shingle the two roof planes at the same time.