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Attic Ventilation for Homeowners: Why is it Important?

Posted on: July 27th, 2012 by Admin

Attic ventilation adds comfort to your home and helps you save on energy costs. But most importantly, it regulates the air movement in your house. How?

During hot weather like summer, the heat coming from the sun directly hits your roof, making the attic extremely hot. This heat travels to the attic floor and then to the lower rooms. Attic ventilation makes your house cooler in such weather as it prevents heat build up. Moreover, you will also be able to save on air conditioning costs.

During cold weather like winter, attic ventilation prevents moisture build up. Remember the basic physics: hot air rises while cool air descends. However, in a cold weather, hot air rises with moist and travels to the attic. If you don’t have adequate ventilation, that hot, moist air gets trapped in the attic causing trusses and rafters to rot and can even ruin the roof insulation. Aside from the natural hot air that rises, some home activities such as cooking, bathing, and laundry also produces water vapor.

Attic ventilation also prevents the formation of ice dams. Ice dams are formed when a warm attic, which is caused by hot air traveling upward the attic, melts the snow on top of the roof. Since the lower part of the roof remains cool, the melting snow freezes again on the edge of the roof, forming ice dams. As the process repeats, water gets stuck in between the ice dams and the melting snow and seeps underneath the shingles, causing leaks.

Attic Ventilation: Getting it Right

Attic ventilation must be balanced by installing adequate and appropriate intake and exhaust vents. Intake vents like the soffit vents allow fresh, dry, cooler air from outside the house to enter the attic, while exhaust vents release hot air. Most roofing experts deem ridge vents as the most cost-effective and most efficient exhaust vent because they don’t need power to operate and they can vent the entire sheathing as long as they are installed at sufficient length.

However, if you’re thinking that installing several vents on your roof is good to release as much hot air from your house, you are wrong. If you have too many exhaust vents installed—for example, a ridge vent and more than a couple of powered fans—they can get the intake from each other, which is air with rain, snow, or dirt, instead of getting it from the soffit vents.

A Nashville, TN roofing contractor can help you choose and install effective attic ventilation system for your home. The Nashville, TN roofing contractor that you’ll be working with must have an experience installing vents in your region. This is because of the possibility that what works best in other regions might not be the same as effective in your region.

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