Why attic ventilation

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Troy B. Roof Repair, Vienna, VA. All rights reserved. An inadequate attic ventilation system can cause a variety of problems that manifest themselves in different ways. If you decide to check for these signs on your roof or in your attic, be sure to keep safety in mind.

Instead of climbing up on the roof, walk around the outside of your home and look up from ground level using a pair of binoculars.

If you head up to the attic, make sure the space is well-lit, that you have a sturdy walking path and are wearing appropriate protective gear. If your roof is getting close to the end of its lifespan , or the decking or other components are damaged or deteriorated, repairs or a replacement may be recommended along with the following steps to properly ventilate your attic:.

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Have you ever seen icicles build up on the edges of roofs and gutters? This ice buildup is known as ice damming. Ice damming happens when heat from inside your attic combines with heat from the sun to melt snow and ice on your warm roof.

When the resulting water runs to the edge of the roof, it begins to refreeze. Proper ventilation helps this warm air escape before it has a chance to melt the snow and ice on your roof.

A well-vented roof is easy to see in the winter months. It still has snow on the roof, but not an icicle in sight. When the temperature outside rises, the temperature on your roof can be nearly double. A hot roof over a poorly vented attic translates into a very hot attic. This buildup of heat can damage your shingles from the inside out. An evenly vented roof will allow the hot air to escape keeping your roof and attic cooler. When the temperature increases outside, we all want to stay cool inside.

A properly vented roof allows heat to escape, thereby reducing the workload on your air conditioner. Have you ever walked upstairs and thought it was at least 10 degrees warmer than it was in your living room? These indoor temperature extremes are often the result of poorly vented roofs.

This can also help prevent super-heated attics, which can also impact your heating and cooling costs. Overall, ensuring proper ventilation will help your home be more comfortable during the entire year.

If you live in a climate where snow and ice occur, having proper attic ventilation minimizes your risk of experiencing damaging ice dams. Ice dams are typically caused by warm air reaching the roof deck, which then results in the snow on your roof melting. Proper ventilation will do two things to help prevent these potentially harmful ice dams:. Intake vents will be installed at the bottom of the roof, oftentimes in the overhangs.

Exhaust vents are typically placed near the peak of the roof. These two vents help create a continuous air flow throughout the attic. The outside cooler air will get drawn into the intake vents, as the warm, humid air will migrate through the exhaust vents, allowing the hot air to rise and escape.

Ideally, there should be equal amounts of both types of vents to ensure the air can flow through the space freely. This creates a slightly pressurized system that helps the air flow nicely.