Sufficient attic ventilation is essential to a healthy and comfortable indoor environment. It can also delay the need for a roof replacement. When not vented properly, this part warm, moist air can accumulate in this part of your home and cause major headaches. For instance, excessive heat in the attic can compromise the integrity of roof decking as well as the shingles.
Here’s what you need to know about roof and attic ventilation.
Types of Roof Vents
Soffit Vents – They are usually the intake vents on the roof. These vents are found on the underside of the roof’s overhang. Soffit vents are usually not noticeable and offer exceptional protection against weather, debris and pests.
Turbine Vents – This type of vents are placed higher up on a roof’s surface and use a wind-powered turbine to release hot air from the roof. Turbine vents are ideal for areas where winds average at least five miles per hour.
Gable Vents – They are slotted pieces of wood or siding installed into the sides of a house. Gable vents can act as both intake and exhaust but they need strong winds to stay efficient. It’s recommended to have them installed on the side of your home that’s constantly exposed to driving rain.
Ridge Vents – Ridge vents run along the roof’s peak and they make a great exhaust vent. Some prefer to have these vents shingled over because they look different from the rest of the roof.
How Many Vents Do You Need?
Roofing companies usually install one vent for every 300 square feet of attic area if it has a vapor barrier. One vent for every 150 square feet of attic area should be installed if the attic doesn’t have a vapor barrier.
Vents are rated based on their net free area (NFA). NFA refers to how much space a vent has to allow air in and out. The total NFA of the roof vents you need must be divided 50/50 between intake and exhaust. However, this rule can change if your roof has more than a 6:12 slope.
Looking for reliable roof installers for your home or business? Turn to Precision Roofing. We have been providing superior residential and commercial roofing services for three decades. Give us a call at (845) 351-2009 or fill out our contact form to request a callback. We work with homeowners in Mahwah, NJ.