Adequate ventilation, alongside routine maintenance, is vital to keeping your roof in good condition. Without adequate ventilation, warm air won’t be able to exit your home, creating a damp environment that’s the perfect breeding ground for mold. Here are some of the other facts about ventilation you need to know:
More Roof Ventilation Isn’t Necessarily Better
Adding more air vents than necessary can severely disrupt the airflow in your roof and attic. As a general rule, there should be a square foot of net free area (NFA) (the area through which air can pass through) for every 300 square feet of floor area for attics with a vapor barrier. And, if your attic doesn’t have a vapor barrier, there should be a square foot of NFA for every 150 square feet of attic floor space. If you’re not sure whether your roof is adequately ventilated, it’s best to have a roof replacement contractor inspect it.
Not All Types of Air Vents Can Provide the Same Level of Ventilation
To ensure your roof is well-ventilated, you need to choose a type of air vent that can provide enough ventilation. Here’s an overview of the most common types of air vents:
- Box vents – Box vents (also known as flat vents, low-profile vents, turtle vents and louvers) are one of the most affordable types of vents, but they’re not exactly the most cost-effective choice. That’s because they’re not as efficient as other types of air vents, which means you’ll need to install several of them to make sure your roof and attic are adequately ventilated.
- Ridge vents – Ridge vents are more efficient than box vents. And, since they run along your roof’s peak, they won’t draw attention to themselves or disrupt your home’s exterior design.
- Turbine vents – Turbine vents rely on wind to draw out humid air from your roof and attic. They’re highly efficient when there’s a strong breeze, but are less effective when there aren’t any strong winds.
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Mpact Roofing, one of the region’s leading contractors, offers a wide range of professional exterior services, including roofing and storm damage repair services. To request a free estimate, call us at (512) 535-2053, or fill out this form.