Open vs. Closed Valley Roof: Which One To Choose

A roof valley is a point where two slopes of a roof meet. Basically, it is a point where the roof changes direction. There are two popular roof valley types, open and closed, and most homeowners get confused about which option is a better choice. 

At McClellands Contracting and Roofing, we have been providing top-quality roofing services in Pittsburgh, PA, and the nearby areas for many years. We aim to guide property owners through each element of their roofing system and building. 

In this blog post, we will discuss open vs. closed roof valleys and which one is the right option for you.

What Is The Difference Between An Open Valley and A Closed Valley?

A closed valley is a type of roof valley where shingles cover the entire valley area. In roofing, valleys are the V-shaped parts where two roof slopes meet. With closed valleys, shingles from both sides overlap in the valley, hiding the metal flashing underneath. This roof valley type is popular because it looks neat and smooth. 

An open valley doesn't mean you can see inside the attic. Instead, it's a type of roof valley that has flashing material over the area where the slopes join. Simply put, in an open valley, the flashing is visible and in a closed valley, it is hidden under the roofing material. 

Open Vs. Closed Valley Roof: A Detailed Comparision

Here is a complete comparison table of closed vs. open valley roofs for a better understanding.

Open Roof Valley	Closed Roof Valley
An open valley features flashing, generally made of galvanized steel, copper, or aluminum, that is exposed in the center of the valley.	In a closed roof valley, the roofing material, such as shingles, is installed to overlap across the valley, creating a continuous and flawless appearance.
The roofing material, such as shingles, is cut back from the valley center, leaving the flashing visible.	There is no visible flashing exposed in the center of the valley.
This design allows for unobstructed water flow down the valley, improving drainage and reducing the risk of leaks.	The roofing material itself serves as the valley lining, which can be more susceptible to leak, as the material ages and degrades over time.
Open valleys are generally considered a great choice for long-term roof performance and durability.	They offer great performance but may not channel water properly during heavy rains.
They are easier to inspect and maintain, as debris is less likely to collect in the smooth metal valley.	Closed valleys may be more prone to issues like water pooling, debris accumulation, and premature wear of the roofing material in the valley area.
Open valleys can provide a more modern, architectural look to the roof.	Closed valleys are often preferred for their traditional aesthetic appeal, as the overlapping shingles can create a more visually appealing look.

When Is It Recommended To Install An Open Roof Valley?

• They're best for areas with lots of rain or snow because they help water flow off the roof quickly. If your roof is steep (a pitch of 6:12 or more), an open valley works well. 

• Open valleys are easier to clean and need less maintenance over time. 

When Is It Recommended To Install A Closed Valley?

• They're good for homes in areas with mild weather and where heavy rain or snow isn't common. If your roof has a gentler slope, a closed roof valley can work well. 

• Some people prefer how closed valleys look, as they give a smooth appearance. They're also usually cheaper to install than open roof valleys.

• Sometimes, manufacturers suggest using closed valleys with their roofing material. Read the manufacturer's guidelines before making a final decision. 

Tips for Choosing Between Open vs. Closed Valleys

It's important to consider your specific needs when choosing a roof valley type. While open valleys are better for harsh weather, closed roof valleys can be a good choice in the right conditions. 

When choosing between open vs. closed roof valleys, think about the local weather, your roof design, and how easy it is to maintain. Remember, the right roof valley type can make a big difference in how well your roof protects your home.

It is always a good idea to consult your roofing contractor, they will recommend the best option that will fit your overall roofing system’s requirements.

Call McClellands Contracting and Roofing For Your Roof Installation In Pittsburgh, PA

Choosing an experienced and trustworthy roofing partner is equally important as choosing the right roofing materials. If you are looking for top-quality roof installation services in Pittsburgh, PA, or the nearby areas, we are here to assist you. At McCLellands Contracting and Roofing, we aim to provide top-notch roofing services.

We understand that a strong roof is important to keep your home safe and dry. We have a team of skilled roofers who have the right skills and knowledge to install any type of roof, including ones with open or closed valleys. If you are unsure which roof valley type is best, our team can help you choose the best option for your home.

We use high-quality materials and follow industry regulations to make sure your roof lasts for decades. When we're done, we clean up everything so your property looks neat.

We want our customers to be happy with their new roofs. That's why we always do our best work. If you need a new roof in Pittsburgh or nearby, give us a call at (412) 353-5660 for more information and a custom quote.