Why does a roof need ventilation?

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Codes in the US require at least 1 sq ft of opening for every 150 sq ft. But what’s so important about ventilation in your home? Ventilation is one of the most important parts of your roof’s construction and extends your roofing’s life and protects the structure of your home. Improper ventilation will allow condensation, moisture formation, and eventually mold and mildew growth that will start to rot your home’s structure. That mold and mildew will also affect your indoor air quality and can be very unhealthy for you and and your family.


Proper ventilation will help your home with several important functions:

  • Helps with your home’s energy efficiency, lowering the bills you pay for heating and cooling.

  • Reduces the risk of fire and, in the event of a fire, the accumulation of too much smoke.

  • Prevents condensation and mold & mildew growth inside the roof deck, which prevents the rotting of the roof deck.

  • Cool the attic space


Roofs can be ventilated with a variety of different vents. Roof ridge vents are installed along the ridge line of the roof. These are used for exhaust or outflow of moisture, heat, and stale air. Soffit vents and eaves go along the lower extremes of the roof and deal with the intake of ventilation. Older homes may not have roof ridge or soffit vents. Today’s home are built with tighter seals than they were in the past. Homes built long ago will have cracks and openings at their windows, doors, and chimneys that allow fresh air into the house.


Roof ventilation is especially important in newer home, where air is tightly sealed in. This is great for energy efficiency, but without roof vents, you’ll find moisture accumulating, rotting your wood, and releasing mold spores into your air. If you don’t notice the problem and have it repaired immediately, you’ll see the destruction of your roof and the poor health of your family.


If your home’s roof isn’t properly ventilated and you need repairs, be sure to hire a professional. Our Cleveland roofing contractors can help make sure you get the right type of ventilation for you home. We’ll also make sure the entire job is up to code. And when the code minimums aren’t going to be enough, we’ll know, and we’ll know how to fix it.


Roof ventilation is a much more serious issue than the average homeowner may realize. If you noticed mold growth in your attic or roof deck, roof ventilation may be the problem.

If you are looking for a roofing, siding, storm damage, or insurance repair specialist in the greater Cleveland area then please call 440-210-7897 or complete our online request form.

If you are looking for a roofing, siding, storm damage, or insurance repair specialist in the greater Cleveland area then please call 440-731-8282 or complete our online request form.