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What is Roofing Ventilation?

Roofing Ventilation Explained: Benefits and How to Install It

If you’re like most homeowners, you know a thing or two about roofing and roof repairs, but knowledge of roof ventilation might spark a few blank stares. Don’t worry! Even if you have no background in roofing, our guide on roofing ventilation has you covered, from understanding the basics to learning all about the amazing benefits and how to get an optimal ventilation system installed.

Let’s start by discussing what roof ventilation is and why it’s important for your home.

What is Roof Ventilation?

Roof ventilation keeps the indoor living environment stable by removing hot air and moisture from the upper levels of your house and encouraging airflow between the attic and other areas of the house. It also helps reduce condensation, mold, and mildew, as well as regulate the temperatures in both winter and summer months.

Understanding Roofing Ventilation Principles

roof ventilationUnderstanding roofing ventilation is crucial for optimal performance. To maximize benefits, you must understand roofing ventilation and how it affects energy efficiency and roof longevity. Proper roofing ventilation uses natural or mechanical ventilation. Mechanical ventilation uses a fan or blower to force air into or out of the attic, while natural ventilation uses wind-assisted convection.

Roof ventilation controls temperature. Natural and mechanical ventilation reduces heat transfer from extreme outdoor temperatures to the attic. If unventilated, warmer air rises into the attic and damages shingles and other materials. Warm air is drawn up from the entrance points and expelled through higher roof vents, cooling the area. This process also reduces attic moisture, which can cause mold and mildew.

What are the possible Drawbacks?

Proper roofing ventilation has drawbacks. Air movement can increase attic noise. If they don’t have experience installing, homeowners should consider hiring a contractor.  Overall, understanding the underlying principles behind effective roofing ventilation will ensure that a homeowner can reap all of its many benefits and ensure their home stays cool and dry during warmer months. The following section will discuss in detail what role attic ventilation plays in achieving optimal results.

  • According to a study published in 2017, roof ventilation can reduce summer attic temperatures by 10-15 degrees Celsius.
  • Roof ventilation can reduce roofing material temperature by up to 25 degrees Celsius compared to an unventilated roof.
  • A properly vented roof helps to reduce moisture which extends the life of your roof and can help prevent costly repairs due to damage caused by condensation and water accumulation.

Role of Attic Ventilation

Attic ventilation plays an integral role in keeping a home’s roofing system healthy. Properly ventilated attics are beneficial in several ways, as they help regulate moisture, reduce cooling costs and extend the life of shingles, among other things. Attic fans may also be installed to further increase airflow.

Some experts argue that attic ventilation does not work, and can even do more harm than good due to increased energy and heating costs during the winter months. However, research conducted by the Florida Solar Energy Center found that in homes with improved attic ventilation, electric bills decreased by 10-30%, on average. In addition, reflective materials and solar-powered fans can be used to greatly reduce winter heating costs associated with improper attic ventilation.

It is clear then that attic ventilation plays a critical role in protecting homes from extreme temperatures and moisture build-up. When properly implemented, it can help reduce electric bills, keep roofs in better condition for longer periods, and protect a home’s shingles and other components from premature deterioration or excessive wear and tear. Now that we have discussed the role of attic ventilation, let’s explore the different types of roof ventilation systems available for installation on your roof.

Different Types of Roof Ventilation Systems

There are several different roof ventilation systems to choose from, each with its unique benefits and drawbacks. The most common types of roof ventilation systems are continuous ridge vents, power vents, off-ridge vents, turbine vents, and gable end wall vents.

Continuous Ridge Vents

This type of roof vent is caused by the rising heat that pushes up from the attic. These vents run along the ridge, or peak, on the roof which allows air to move out while preventing air from entering in. This style of vent offers excellent ventilation and is aesthetically pleasing as it’s not easy to notice on the roofline.

Power Vents

Power vents work by taking the existing heat in an attic and pulling it out with fans, thus creating consistent airflow through the use of electricity. It’s an effective form of roof ventilation and is less expensive than other systems, but does require regular maintenance due to being dependent on electricity for functionality.

Off-Ridge Vents

Off-Ridge Vents provide continuous ventilation without detracting from the roof’s aesthetics. They are often used together with ridge vents to provide constant airflow throughout the attic space.

Turbine Vents

Turbine Vents rely on wind power to draw air out of an attic. This type of vent does not require any maintenance or energy costs like a power vent and looks great atop the roofline when properly installed. However, many homeowners often find them ineffective due to turbulence caused by nearby structures blocking the airflow or lack of sufficient wind speed.

Gable End Wall Vents

Gable end wall vents allow air to flow in and out freely depending on the direction of airflow. These types of vents come in both manual and electric varieties and work well in areas where turbines may be unreliable because they do not rely exclusively on wind power for operation.

When considering which type of roof ventilation system is right for your home it’s important to weigh both sides of each option carefully to make sure that you get optimal performance while also sticking to your budget constraints.

Factors to Consider When Choosing a Roof Ventilation System

When it comes to choosing a roof ventilation system, there are several factors to consider. Here are some of the most important ones:

  1. Roof Type: The type of roof you have can have an impact on the type of ventilation system you need. For example, some roofing materials, such as metal or tile, may require a different type of vent than asphalt shingle roofs.
  2. Climate: The climate in your area can also affect the type of ventilation system you need. For example, in a hot and humid climate, you may need a system that provides more ventilation to help prevent moisture buildup and heat damage.
  3. Roof Size: The size of your roof will determine how many vents you need to install to ensure proper ventilation. A larger roof may require more vents than a smaller one.
  4. Attic Space: The amount of attic space you have can also impact the type of ventilation system you choose. Some systems require more space than others, so it’s important to consider this when making your selection.
  5. Energy Efficiency: Choosing an energy-efficient ventilation system can help you save money on your energy bills. Look for systems that are designed to reduce heat loss and improve overall energy efficiency.
  6. Noise Level: Some ventilation systems can be noisy, which can be a concern if you have bedrooms or other living spaces near the attic. Look for systems that are designed to operate quietly.
  7. Installation: Finally, it’s important to consider the installation process for the ventilation system you choose. Some systems may be easier to install than others, and it’s important to ensure that the installation is done correctly to ensure proper ventilation and prevent potential damage to your roof.

By considering these factors when choosing a roof ventilation system, you can ensure that you select the right system for your home and enjoy the benefits of proper ventilation for years to come.


In conclusion, understanding roofing ventilation is essential for the longevity and safety of your home. With proper ventilation, you can prevent moisture buildup, protect against structural damage, and improve energy efficiency. When choosing a roofing ventilation system, it’s important to consider factors such as roof type, climate, roof size, attic space, energy efficiency, noise level, and installation requirements.

By selecting the right system and ensuring that it is installed correctly, you can enjoy the benefits of improved ventilation for your home. Whether you’re installing a new roofing ventilation system or upgrading an existing one, it’s important to work with a professional to ensure that your system is properly designed and installed. With the right care and attention, your roofing ventilation system can help to protect your home and provide a safe, healthy, and comfortable living environment for years to come. Contact us today!

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