Vented Attic Definition

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.

Vented attic definition.

2009 irc 2012 irc adequate attic ventilation is a long standing requirement in building codes for moisture control. Few things are more misunderstood about the home than attic ventilation. In the winter warm moist air seeps into the attic from the living space below. The shutter will open when the electric gable vent is operating.

Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. That cuts cooling costs and prolongs shingle life. For example in the summer months your attic is likely going to be very hot. Prior to installing the ridge vent a 1 inch wide strip of roof decking is cut out along both sides of the ridgeline to allow for air movement through the vent.

In the summer good attic ventilation reduces heat buildup. Constructed of white aluminum that can be painted. Intake vents located at the lowest part of the roof under the eaves allow cool. In essence all ventilation is about circulating air to keep it fresh and to reduce moisture levels.

A ridge vent is a ventilation strip that is placed along the ridgeline of the home. A vented attic system refers specifically to having working vents in the attic. Power gable vent shutter is designed to be used with master flow egv pg series electric gable fans. Those vents in the attic allow for airflow and that airflow moves the hot air and moisture out of the attic.

Good ventilation allows the heat and moisture to escape. And i mean completely intact. About 90 percent of homes in the us have unreasonably high levels of moisture. However unvented attics can reduce residential energy needs and are allowed by the code under certain conditions.

It is important that air movement occurs and is not impeded by any framing members of the.