![]() Shingles installed, a closed-cut valley is likely not the best choice. ![]() As a result of this installation method, the top layer of shingles overlaps the bottom by a few inches. Finally, they cut the second layer of shingles in a straight line two inches from the center of the valley. Then, they install the shingles on the second plane, allowing them to overlap the first layer. They stop roughly 12 inches past the center of the valley. To get this look, a roofing professional installs the shingles on one roof plane first. You can identify a closed-cut roof valley by the straight line of cut shingles running down the approximate middle of the valley. As a result, woven valleys are now rarely seen. ![]() Instead, getting a proper weave could take more time than the simple cut a roofer has to do for a closed-cut valley. Woven valleys also do not save the roofing professional in time or materials over closed-cut valleys. Having woven valleys installed may void your limited warranty. Because of this, woven valleys are not recommended by most laminate shingle manufacturers. They likely will not bend enough to be woven in neatly, especially not in cooler climates. Woven valleys are challenging to install with laminate shingles, which are stiffer and thicker than 3-tab shingles. However, it is a challenge to precisely place the weave in the middle of the valley. When they reach the valley, they weave the shingles from each plane together, without having to cut them.Ī woven valley creates a continuous look. The roofing professional installs shingles on both planes at once. In a woven valley, shingles are woven together through the valley. Open roof valleys have metal liners down the center. Most homeowners like this look.Ĭalifornia Roof Valley (Open Metal Variant)īest suited to steep roofs from 6:12 and up, may not meet building codes in some areasĬalifornia roof valleys are generally only used with conventional laminate shingles. It’s harder to achieve a woven valley with laminated shingles.Ĭlosed-cut valleys have a straight cut down a few inches from the center. Shingle Roof Valley Types: Quick Reference Chart We’ve compiled a quick chart that will help you understand the fundamental differences between them.Īfter the chart, we’ll go into detail about each type of roof valley, how to keep your valley well-maintained and what your options are if you need roof valley repair. ![]() Each type has its own benefits and drawbacks. There’s also a subtype of open metal valley, called a California valley. There are three main types of roof valleys: woven roof valley, closed roof valley and open roof valley. So, your choice of roof valley installation method is critical to maintain your warranty and get the best longevity from your roof. Manufacturers may require you to have a certain roof valley type in order to be covered by their limited warranty. Therefore, the roof valley will see the most wear and is the second most likely spot on a roof to develop a leak. The water from both roof planes is channeled into the valley, so it carries the most water. The roof valley is a challenging part of the roof to install. Over the years, roofers and manufacturers have come up with a few different ways to install the valley and merge those two roof planes together. Each roof plane has a layer of shingles that need to smoothly intersect at the valley, even though they are laid at slightly different angles. All other valley types are not covered by IKO’s limited warranty.Ī roof valley is a spot where two roof surfaces meet. NOTE: IKO recommends open metal valleys for best roof performance. Keeping Your Roof Valley in Good Condition.When Should Your Roof Valley be Repaired?.Which Type of Roof Valley is Recommended?. ![]() Shingle Roof Valley Types: Quick Reference Chart. ![]()
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