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Is A Closed Valley Roof Good For Your Home? Find Out!

Posted on November 13, 2023

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Is A Closed Valley Roof Good For Your Home? Find Out!

At Hepler Contracting, we’re here with a topic that often slips under the radar, but still plays a crucial role in the longevity and aesthetics of your home: closed roof valleys. If you’re on the fence about whether to choose this style of valley for your roof, you’re in the right place. In this blog post, we’ll explain everything you need to know about closed valley roofing to determine if this is the right design for your home.

What Is A Closed Roof Valley?

A closed valley is a design where shingles from one side of the roof extend across the valley, continuing on to the other side to cover the gap where the two roof slopes meet. This seamless, closed appearance, is different from the open valley design where a metal piece of flashing is utilized to cover the joint. 

When it comes to this enclosed valley design, there are two ways to install it: With a flashing material underneath the shingles, or without the flashing.

Closed Valleys With Flashing

Closed Valleys With Flashing

This method involves placing a metal strip of flashing beneath the shingles on the valley, adding an extra layer of protection. It’s particularly beneficial in areas with high amounts of precipitation, ensuring water is efficiently directed away from vulnerable points.

Closed Valleys Without Flashing

Closed Valleys Without Flashing

In regions with milder climates, or roofs that are equipped with a reliable ice and water shield or underlayment, additional flashing might not be necessary. The key here is to rely on the strength of your chosen underlayment.

Are you wondering if a closed valley roof is a good option for your home? Let’s look at the pros and cons of closed valleys to assist you in making a final decision.

The Advantages Of Closed Roof Valleys

From seamless visual appeal to enhanced protection, closed valley roofs are a great option for homes in areas with high precipitation. Given that the flashing material is installed beneath the shingles.

Enhanced Aesthetics

The closed design is more than a visual choice; it’s a statement of sophistication. By covering the metal flashing, the roofline achieves a polished and seamless appearance, enhancing the overall curb appeal of your home.

Improved Water Resistance

One of the primary functions of any roof is to protect against the elements. Closed valleys excel in this aspect, as the shingle covering forms an additional barrier against water infiltration. Roofers often choose to install metal flashing beneath the closed valley shingles to bolster this water-resistant feature.

Durability Under Pressure

Especially in regions prone to heavy rainfall or snow, closed valleys demonstrate their durability. The additional shingle coverage, when paired with metal flashing, creates a robust structure that prevents water from finding its way through vulnerable areas, adding a layer of protection against the challenges posed by diverse weather conditions.

Understanding The Downsides Of Closed Roof Valleys

Here are some concerns with closed valleys that homeowners need to be aware of:

Ventilation Challenges

In closed valley systems, ensuring proper ventilation can be a bit tricky. The enclosed space may restrict airflow, which might lead to issues like moisture buildup and, in the worst-case scenario, mold growth.

Installation Complexity

Achieving a flawless closed valley installation demands accuracy and finesse. If not done correctly and neatly, it might result in ponding water, shingle damage, or an unsightly appearance.

High Maintenance Efforts

Closed valley roofs generally demand higher maintenance. The buildup of leaves, twigs, and other debris on shingled valleys can reduce the effectiveness of water drainage, leading to algae growth, shingle damage, and roof leaks. Hence, closed valleys need more cleaning and upkeep than open valleys. 

Closed, and open roof valley designs have different pros and cons, and understanding the nuances of each is helpful when choosing the right design.

Closed Vs. Open Roof Valleys: Which One Is Better For Your Home?

In open and closed valley roofing, your choice will typically depend on your preference for visual appeal and performance under different weather conditions.

Closed valleys provide a seamless look to the roof. The overlapping shingles provide enhanced water resistance, which is particularly beneficial in areas with high precipitation. It’s a good option if you are ready to take on some extra maintenance efforts.

With open roof valleys, the valley area is not covered by shingles. Instead, a metal flashing strip protects the valley while providing a contrasting look. Roof valley flashing of this design is easier to maintain, as debris and water tend to flow through it easily.

If you decide a closed roof valley is right for you, let’s look at some popular designs.

Design Options For Closed Valleys

Let’s explore some captivating designs!

Straight Cut

The classic straight cut design is a timeless choice characterized by a clean, linear line down the valley. This simplicity lends itself well to a variety of architectural styles, offering an elegant and straightforward appearance that stands the test of time.


If you’re looking for a designer look, you should choose woven roof valleys. This design intertwines shingles in a zigzag pattern. This forms a textured and eye-catching look, which reflects sophistication and beauty. It also provides a more seamless finish.

California Cut

Infusing a modern twist into the classic straight cut, the California cut design introduces angled lines along the valley. This classic aesthetic brings a sense of movement and uniqueness to the roofline, making it a unique choice.

For more information, you can read our previous blog post, where we explain how you can choose the right type of roof valley design for your home. 

Discuss Stunning Roof Designs With Pittsburgh’s Reliable Experts!

At Hepler Contracting, we’re here to make your roof renovation project a smooth and enjoyable experience! For many years, our experts have been installing new roofs and upgrading old ones with outstanding workmanship. If you want to upgrade your roof valleys, or need a roof installation service in Pittsburgh, you can count on us! Give us a call at (412) 694-8785, and schedule a free consultation and estimate with one of our experts. We’ll be happy to work with you to build a sturdy and beautiful roof within your budget.

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