What is : Closed Valley

What is Closed Valley?

A closed valley is a roofing construction technique where shingles from both sides of the roof meet in a straight line without any metal flashing exposed. This method provides a clean and seamless look to the roof while also ensuring proper water drainage.

Advantages of Closed Valley

One of the main advantages of a closed valley is its aesthetic appeal. By hiding the metal flashing, the roof looks more visually appealing and cohesive. Additionally, closed valleys are less prone to leaks compared to open valleys, as there are fewer opportunities for water to seep through.

Materials Used in Closed Valley

The materials commonly used in closed valleys include shingles, underlayment, and metal flashing. The shingles are laid in a way that they overlap each other at the valley, while the metal flashing is installed underneath to provide extra protection against water infiltration.

Installation Process

To install a closed valley, the roofing contractor will first lay down the underlayment followed by the metal flashing. The shingles are then installed on both sides of the valley, meeting in the center to create a seamless look. Proper sealing and fastening are crucial to ensure the valley is watertight.

Maintenance and Repair

Regular maintenance of a closed valley is essential to prevent any water damage. Inspecting the area for loose or damaged shingles, as well as checking the integrity of the metal flashing, can help identify and address any issues early on. In case of damage, repairs should be done promptly to avoid further damage.

Cost Considerations

The cost of installing a closed valley can vary depending on the materials used, the size of the roof, and the complexity of the design. While closed valleys may be more expensive upfront compared to open valleys, the long-term benefits in terms of durability and aesthetics can outweigh the initial investment.

Conclusion

In conclusion, a closed valley is a roofing technique that offers both functional and aesthetic benefits. By providing a seamless and watertight transition between roof sections, closed valleys can enhance the overall look and performance of a roof.