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  • Writer's pictureMeredith Ott

Should you choose an open or closed roof valley? We like open!

Updated: Jun 9

Have you ever heard of open valley and closed valley roofing systems? If not, don’t worry - you're not alone. Many home owners are unaware of the different types of roof valleys, yet they can have a major impact on the quality and longevity of your roof. In this blog post, we will look at these two different types of valleys, discuss the similarities and differences between them making sure to explain why one might be better suited for your home than the other. By understanding how each methods works and what it entails, you'll be able to make an informed decision that allows you to get the most out of your new or existing rooftop system.


Open Valley- Our favorite!

To create an open valley, your roofer will install a layer of flashing beneath the shingles. This additional element provides visual appeal with its shiny stripe that runs down the center and is revealed through deliberate gaps in overlapping shingles.


Valleys are the water-catchers on rooftops, where rainwater and snow gather before being quickly channelled away. Metal flashing reinforces this role by providing an extra protective layer against intruding moisture while simultaneously aiding rapid runoff - a vital feature for those pesky low pitched roofs! Small wonder that it's such a popular waterproofing choice due to its superior performance capabilities.


The image depicts a close-up view of a shingle roof with an open valley. The shingles on the roof are dark in color and have a textured, three-dimensional appearance. The open valley is a V-shaped channel that runs along the slope of the roof, separating two sections of the shingles. The valley is lined with metal flashing, which is visible through the gap in the shingles. The flashing is designed to guide water down the valley and into the gutters, preventing it from seeping under the shingles and causing damage to the roof's structure. The open valley is a popular design choice for shingle roofs as it allows for efficient water drainage and reduces the risk of leaks.
Shingle roof with open valley

PHOTO CREDIT: https://www.iko.com/na/pro/building-professional-tools/roofing-101/how-to-shingle-a-roof-valley-with-architectural-shingles/

Closed Valley Types: Woven and Closed Cut

If you're after a closed roof valley, think twice before committing. Although they can be aesthetically pleasing and provide extra protection against the elements, their performance is often subpar compared to open-style valleys. Excessive expansion and contracting in Florida's harsh climate may speed up the break down process. In some cases we even have restrictions on installing certain types of closed roofs - so it's important to consider all your options!


Woven Valley

At Heart Roofing LLC, our team has perfected the art of weaving valleys. Instead of cutting through or leaving gaps in your roof's design, we expertly craft a consistent and timeless look by interlocking shingles from both sides of each valley. Our experienced installers ensure this weave is perfectly smooth while creating an elegant transition between planes - giving you an impeccable finish!


Woven valleys can present a unique challenge due to the shingles that are positioned across the valley. This configuration creates additional opportunities for water intrusion and premature wear of these shingles, particularly on low-slope roofs in more temperate climates where rainfall is frequent. In order to protect against potential leakage, we carefully consider conditions before installing woven valleys.


The image depicts a shingle roof with a closed valley design. The roof is composed of rectangular shingles with a uniform, light brown color. The closed valley technique involves laying shingles on both sides of the valley, with the edges of the shingles meeting at the centerline. The valley is covered with a strip of metal flashing, which is visible in the center of the image. The flashing is designed to prevent water from penetrating under the shingles and causing damage to the roof structure. The closed valley technique is a popular alternative to the open valley design, as it provides a seamless and aesthetically pleasing appearance.
Diagram showing woven valley technique

PHOTO CREDIT: https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.atlasroofing.com%2Fdownload.php%3Fuid%3D1504&psig=AOvVaw3Kk6qbYOCE8EiYjNScHLfa&ust=1674513024208000&source=images&cd=vfe&ved=0CA8QjRxqFwoTCIDnr6Kd3PwCFQAAAAAdAAAAABAF


Closed Cut Valley

For professional performance, open valleys are the preferred choice over closed cut ones. With a closed valley installation, shingles must be manually fitted into the center of the valley and held in place - an intricate process that takes considerable time with no additional benefits for your roof system. Furthermore, these cuts can lead to separation between them which leads to water seeping through rather than being directed away from you home as is intended by any quality roof system.


The image depicts a close-up view of a shingle roof with a woven valley design. The roof is covered with rectangular shingles with a dark, textured appearance. The woven valley technique involves interweaving shingles from both sides of the valley, creating a pattern that resembles a woven basket. The valley is covered with a strip of metal flashing, which is visible in the center of the image. The flashing is designed to prevent water from seeping under the shingles and causing damage to the roof structure. The woven valley technique is a popular alternative to the open and closed valley designs, as it provides an attractive and distinctive appearance while maintaining the functionality of the valley.
Shingle roof with closed valley technique

Woven and open valleys are both a superior choice, for different reasons. But which is best for your specific roof? Reach out to us to discuss your options 321-499-3012


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