Why Does Attic Need Ventilation

Ventilation only works when air flows.

Why does attic need ventilation.

In other words the entire vent opening doesn t count as vented space. There are two primary methods to create air flow within an attic. Attic ventilation fans help cool air your attic by pushing out the stifling hot air from inside the attic and bringing in cool air from outside. We need to breathe to get fresh air in and out of our bodies.

Effective ventilation provides year round benefits creating a cooler attic in the summer and a drier attic in the winter. That said air resistance and interference such as vent grates reduces the area of true ventilation. Heat and moisture buildup in an attic cause predictable but different problems in hot and cold climates. Intake vents located at the lowest part of the roof under the eaves allow cool.

Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. How does venting work to let your attic breathe. A balanced attic ventilation system that consists of intake at the eaves soffits or fascias of the roof and exhaust at or near your roof ridge serves two important functions. First it allows cool fresh air to enter into the attic.

Roof ventilation works by allowing air to flow through the attic which prevents it from becoming overheated and causing moisture. This prevents hot air from seeping into your home and driving up the temperature in the living space which reduces the load on your air conditioner. Why adequate roof ventilation is important. Attic ventilation is an intake and exhaust system that creates airflow designed to decrease the difference in temperature between the outdoor air and the air inside the attic.

Generally speaking you need a ratio of 1 300 where for every 300 square feet of ceiling space you need 1 square foot of attic ventilation. Whenever possible natural roof ventilation is used. Requires a power source. Second it allows hot moist air to escape.

While we have an active process most homes have a passive venting system which requires a balance between the intakes and outlets. In the winter allowing a natural flow of outdoor air to ventilate the attic helps keep it cold which reduces the potential for ice damming snow that melts off a roof from an attic that is too warm and then re freezes at the gutters causing an ice dam that can damage the roof. For similar reasons your attic needs to breathe also.