How to Calculate How Many Roof Vents You Need

The heat of Tampa’s subtropical climate can place added stress on your roof, leading to costly repairs and high energy bills. Proper ventilation is essential to release heat and keep your roofing system in good condition, protecting the comfort, safety, and health of your family.

Balance is vital to effective roof ventilation. In this blog post, you will learn how to calculate the number of roof vents you need in your home or property. Read on.

Three Simple Steps to Calculate Attic Ventilation

Determining the right number of exhaust and intake vents is not really that difficult and will ensure you have an efficient, balanced system. Here are three simple steps for calculating the vents your roof requires:

How to Calculate How Many Roof Vents You Need

Step 1: The first thing you need to know is the total area of intake and exhaust vents required. Generally, 1 sq.ft. of attic ventilation is needed for every 250 - 300 sq.ft. of enclosed attic space. To calculate the minimum total area of ventilation, divide your total attic floor space by 300.

  • For example, if your property has 5,000 sq.ft of attic floor space, you divide 5,000 by 300. In this case, you would need at least 16 sq.ft of attic ventilation.

Step 2: Next, you divide the total ventilation area by 2 to evenly balance intake and exhaust vents.

  • Continuing the above example, the 16 sq. ft. of total ventilation space would be divided into 8 sq. ft. of intake vents and 8 sq. ft. of exhaust vents.

 

Step 3: Convert measurements as needed. Since vents are usually rated in sq. inches, it is advisable to convert the sq.ft required to sq. inches. Several online calculators and tools can help you make these conversions quickly and easily.

Affordable Roofing Systems will be happy to handle all the calculations and installation for you. We have been providing complete roofing solutions for more than 20 years, earning a reputation as Tampa Bay’s trusted roofer of choice. Call us now at 813-542-8462 for a free estimate!

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