Roof valleys are key aspects of any roofing system. These are channels to send rainwater, snowmelt, and other debris away from the house. Roof valleys see a lot of water during storms, so it is imperative that your roof has the right system. When installing a new roof, one of the major choices homeowners and construction professionals will be making is open vs. closed valley roofing systems.
Both systems have advantages, and you should decide based on several factors, including the local climate in your area, how your roof is designed, and your personal preferences.
This guide covers the general differences between the two systems and can help you decide which system is right for your roof.
What Exactly Are Roof Valleys?
Valleys are channels that guide rainwater and debris off the roof where two sloped sections meet. If a roof has no valleys, rainwater and snowmelt could pool in different segments of the roof, which can cause some leaks and damage to your roofing structure
When this happens, you may find yourself spending thousands of dollars on roof repairs. Due to the amount of water that passes through these valleys, it is critical they are correctly installed and maintained.
Roof valleys can be made out of a range of materials, including roof valley metal, valley flashing, and woven shingles. The purpose of these materials is to guide water away from the roof and into the gutters. The way in which they are utilized depends to a huge extent on the type of roof valley you opt for — open valley or closed.
The Importance of Properly Installed Roof Valleys
If you are planning to install a new roof or replace an old one, ensuring you have the right type of roof valley is key to preventing common roofing problems. Poorly installed roof valleys are typically the first sections to show signs of wear and tear.
Water can seep under the shingles, pool in the valleys, eat away at the underlayment, and eventually drip through to your attic — leading to leaks and, worse, a mold problem that could rot out sections of wood.
That is where Boelter is Better, a reputable roofing company, comes in. We can make sure that your roof valley is installed correctly so that your house stays protected for years.
What Is an Open Valley Roof?
An open valley roof is a roofing system in which the valley or intersection of two roofs is left uncovered. A metal flashing—usually made of aluminum, copper, or galvanized steel—runs the entire length of the valley
At the edge of the valley, the roofing shingles are cut back to expose the metal flashing so water flows directly over it. The metal exposed at an open valley is the primary channel that directs water from the roof down and towards gutters.
Benefits of an Open Valley Roof
The open valley roof is the classic and preferred option for many homeowners as it is durable and functional, and it requires minimum care. It has the benefit of directing water away from the roof using metal flashing, which is especially useful if you live in an area with high rainfall or snow. Here are some key benefits of choosing an open valley roof:
Superior Water Drainage
A large part of why open valley roofs are so effective is their ability to deal with water. Water can slide down the metal flashing with ease, allowing fast and effective drainage. This is also very useful in areas that experience a lot of rain or falling snow; this water will be drained without any blocking.
On the other hand, some systems may catch debris that could clog the valleys and reduce the water flow. With an open valley roof, there is room for water to move around, which greatly decreases the likelihood of any pooling or leaking.
It is built to withstand rough weather, so it is perfect for areas of the country that experience heavy storms or snow.
Ease of Maintenance and Inspection
An open valley is also easier to inspect and maintain than a closed valley system. The metal flashing is exposed, so any debris, damage, or blockages are easy to see.
Cleaning out an open valley is also straightforward—leaves, twigs, and dirt can be swept away quickly. This system makes it easy to maintain regular roof maintenance.
In areas with high foliage, where leaves or branches frequently fall onto roofs, an open valley system allows for easier removal of obstructions. Additionally, if the valley flashing or roof valley metal begins to wear out or becomes damaged, it’s easy to replace it without disturbing the surrounding shingles.
Durability
Metal flashing in an open valley roof often lasts longer than the shingles that cover the rest of the roof. Metals like copper or galvanized steel are resistant to water damage, rust, and corrosion, making them a durable choice for roofing valleys. The longevity of the metal valley ensures that your roof remains protected for years to come.
Considerations for Open Valley Roofs
While open valleys excel in functionality, they may not always appeal to homeowners who prioritize aesthetics. The visible metal can sometimes disrupt the overall look of the roof, especially if the flashing doesn’t match the color or style of the shingles.
However, this issue can be mitigated by using materials like copper, which develops an attractive patina over time, or painted metal that complements your roof color.
Boelter is Better can help you choose the best material for your open valley roof and also for your gutters & gutter covering, ensuring that it not only functions optimally but also enhances your home’s curb appeal.
What Is a Closed Valley Roof?
A closed valley roof, as the name implies, covers the valley completely with shingles. Unlike open valleys, no metal flashing is visible. There are several types of closed valley systems, including the woven valley roof and the closed-cut valley roof.
In a woven valley roof, shingles from both sides are interlaced, creating a smooth, continuous surface that covers the valley. In a closed-cut valley, the shingles from one roof plane are cut back, and the shingles from the opposite plane overlap, forming a neat line along the valley.
Benefits of a Closed Valley Roof
A closed valley roof presents a seamless and aesthetically pleasing option for homeowners looking for a cohesive roofing system. By utilizing shingles to cover the valley, this design not only enhances the overall look of the roof but also provides effective water drainage. Here are some of the notable benefits of opting for a closed valley roof:
1. Seamless Appearance
The primary advantage of a closed valley roof is its aesthetic appeal. With no metal visible, the roof maintains a clean, seamless look, which can be particularly attractive for homes with traditional or modern design elements. The shingles in a closed valley roof blend into the rest of the roof, creating a unified appearance that many homeowners prefer.
For homeowners who value curb appeal, the closed valley system offers a more integrated and visually appealing roofing solution. Whether you’re using asphalt shingles, wooden shakes, or tile, the closed valley allows the roofing material to maintain a consistent, uninterrupted look.
2. Protection for the Valley Metal
In a closed valley system, the valley metal and flashing are covered by shingles, which can offer additional protection from the elements. While metal is durable, it can still be susceptible to wear and tear, especially in areas with extreme weather conditions. By covering the valley with shingles, you reduce the exposure of the valley metal to direct rainfall, sunlight, and temperature fluctuations, which can extend its lifespan.
In particularly wet climates, the additional layer of protection can help shield the metal valley from rust or corrosion. In milder climates, this extra layer of protection may help reduce overall maintenance.
3. Cost-Effective Option
For many homeowners, cost is a significant consideration when choosing a roofing system. Closed valley roofs are often more cost-effective than open valleys because shingles are generally less expensive than metal. Additionally, the installation of shingles over a valley may take less time than carefully cutting and laying out metal flashing, which can help reduce labor costs.
However, it’s essential to note that while closed valleys may be more affordable upfront, improper installation can lead to long-term problems such as leaks and water damage. That’s why it’s crucial to work with a professional roofer like Boelter is Better to ensure the job is done right the first time.
Considerations for Closed Valley Roofs
While closed valley roofs have many benefits, they are not without drawbacks. One potential issue is water drainage. Since the valley is covered with shingles, it can become a point of accumulation for debris such as leaves, twigs, and dirt.
Over time, this debris can clog the valley and impede water flow, increasing the risk of leaks or water damage. Regular inspections and cleaning are necessary to keep the valley clear and ensure proper drainage.
Additionally, closed valley roofs may not be as durable as open valley systems. The shingles that cover the valley may wear out faster than metal flashing, especially in regions with harsh weather conditions.
Heavy rain, snow, or ice can erode the shingles more quickly, potentially requiring more frequent repairs or replacements.
Boelter is Better offers high-quality installation and maintenance services, such as roof snow removal, to help you get the most out of your closed valley roof. Whether you need regular inspections or repairs, we’re here to keep your roof in top condition.
Open Valley Roof vs. Closed Valley Roof: Key Differences
Now that we’ve explored the individual characteristics of open and closed valley roofs, let’s compare them side by side to help you make an informed decision:
1. Water Flow and Drainage
- Open Valley Roof: The exposed metal flashing allows for superior water drainage. Water flows easily over the metal, making open valleys more efficient at handling heavy rainfall and snowmelt.
- Closed Valley Roof: While functional, closed valleys may not drain water as quickly. The shingled surface can accumulate debris, which may slow down water flow and lead to pooling or leaks if not properly maintained.
2. Maintenance and Inspection
- Open Valley Roof: This roof is easier to inspect and clean due to the exposed valley metal. Any blockages or damage to the flashing can be easily identified and addressed without disturbing the shingles.
- Closed Valley Roof: More prone to debris buildup, which can impede water flow. Regular inspections are necessary to ensure that the valley remains clear and functional.
3. Durability
- Open Valley Roof: Metal flashing is more durable and resistant to wear and tear than shingles. Open valleys typically last longer and are less prone to damage from heavy rain or snow.
- Closed Valley Roof: Shingles may wear out faster than metal, especially in areas with extreme weather conditions. However, the additional protection provided by the shingles can help shield the valley metal from the elements.
4. Aesthetics
- Open Valley Roof: The exposed metal may not be as visually appealing for homeowners who prioritize a seamless look. However, using materials like copper can enhance the aesthetic appeal.
- Closed Valley Roof: Offers a clean, unified appearance, as the valley is covered by shingles. This system is ideal for homeowners who value aesthetics and want a roof that looks cohesive.
5. Cost
- Open Valley Roof: Metal flashing can be more expensive than shingles, making open valley roofs a pricier option in some cases. However, the system’s durability and longevity may justify the higher upfront cost.
- Closed Valley Roof: Generally more cost-effective due to the lower cost of shingles. However, improper installation or lack of maintenance can lead to costly repairs down the road.
6. Installation Complexity
- Open Valley Roof: This roof requires precise installation, especially when cutting the shingles around the valley and installing the metal flashing, which can add to labor costs.
- Closed Valley Roof: Installation is generally simpler and faster, as the shingles are laid directly over the valley. However, improper installation can lead to leaks and other issues.
Which One Is Best for You?
Choosing between an open valley roof and a closed valley roof depends on several factors, including your climate, budget, and personal preferences.
Choose an Open Valley Roof If:
- You live in an area with heavy rainfall or snow and need superior water drainage.
- You prefer a roofing system that’s easy to inspect and maintain.
- You’re looking for a durable option that will last for years with minimal repairs.
Choose a Closed Valley Roof If:
- You prioritize aesthetics and want a seamless, cohesive look for your roof.
- You live in a region with mild weather and don’t expect heavy rainfall or snow.
- You’re working with a limited budget and want a cost-effective option that still provides adequate protection.
How Boelter is Better Can Help
At Boelter is Better, we recognize that selecting the right roof valley system is crucial for the long-term performance and durability of your roof. With various options available, it can be challenging to determine which is the best fit for your home.
That’s where our team of seasoned experts comes in. We are committed to guiding you through the entire decision-making process, considering your home’s unique architectural features, climate conditions, and budgetary constraints.
Whether you’re leaning toward an open valley roof for its superior drainage capabilities or a closed valley roof for its seamless appearance, we offer high-quality installation, maintenance, and roof repair services tailored to your specific needs.
Our experienced contractors utilize industry-leading techniques and materials to ensure that your roof valleys are installed correctly, maximizing their effectiveness in protecting your home from water damage.
We also believe in building lasting relationships with our clients. Our team is always available to answer any questions and provide ongoing support to keep your roof in top condition for years to come. Trust Boelter is Better to deliver not just a roofing solution but a reliable partnership in safeguarding your home.
Ready to Protect Your Home? Let Boelter Is Better Help You Choose the Perfect Roof Valley System!
Roof valleys may seem like small components of a roofing system, but they play a significant role in protecting your home from water damage. Whether you choose an open valley roof or a closed valley roof, it’s important to work with a trusted contractor who can ensure proper installation and long-lasting performance.
If you’re unsure which system is best for your home, contact Boelter is Better today. As a trusted roof replacement company, we can help you weigh the pros and cons, consider your climate and aesthetic preferences, and make an informed decision that keeps your roof—and your home—protected for years to come.
Call us today at Boelter is Better to learn more about roof valley systems and to get started with finding the right one for your home.
