The Principle Of Attic Ventilation

Of attic space you need 1 sq.

The principle of attic ventilation.

Proper attic ventilation will help increase home comfort help ensure the life and performance of roofing materials and may reduce utility bills. Several purposes of an attic ventilation system are to provide added comfort to help protect against damage. During warmer months ventilation helps keep attics cool. There is a formula for calculating your ventilation needs.

Proper attic ventilation offers all these benefits. During colder months ventilation reduces moisture to help keep attics dry. It also helps prevent ice dams. Principles of attic ventilation.

It also helps prevent ice dams. It helps minimize the impact of ice damming. Attics are ventilated by strategically placed roof vents which allow outdoor air to come in and let indoor air escape. In the summer good attic ventilation reduces heat buildup.

In the winter warm moist air seeps into the attic from the living space below. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. In cold climates the primary purpose of attic or roof ventilation is to maintain a cold roof temperature to control ice dams created by melting snow and to vent moisture that moves from the conditioned space to the attic ventilation acts to bypass the vapour barrier created by most roof membranes. An effective attic ventilation system provides year round benefits.

If you understand the principles of attic ventilation you know an effective venting system provides year round benefits. It promotes a cool dry attic. It states that for every 150 sq. Attics need to breathe in all climates.

Calculate your ventilation needs. By removing the hot air from the attic the home is able to stay cooler and the air conditioner runs less frequently. Intake vents located at the lowest part of the roof under the eaves allow cool. There is a generally agreed upon formula that you can apply for balanced attic ventilation known as the 1 150 rule.

Take the total square footage of your attic and divide it by 150. It allows outside air to flow naturally upward and out of attic. During colder months ventilation reduces moisture to help keep attics dry. That cuts cooling costs and prolongs shingle life.

Thus you first have to calculate the square footage of the attic if you don t already know it and to do it you need to measure three values the length width and height of the space. Removes heat from the attic. 3 principles of proper attic ventilation. During warmer months ventilation helps keep attics cool.

With that in mind here are three important principles to ensure proper attic ventilation.