Yes, Your House Needs To Breathe.
For Hot Weather As Well As Cold.
Allstar pays more attention to the way your house breathes than any other company out there. Proper ventilation is essential to your home. Proper ventilation helps prevent ice dams, condensation and extends the life of your roof.
A properly ventilated attic increases comfort and saves energy costs all year long. During the summer, excess heat builds up in the attic during the day and results in higher energy costs for cooling. During the winter, moisture produced within the home may move into the attic if ceiling vapor barriers are not installed properly. The moisture will condense and cause insulation and construction materials to deteriorate.
In cold climates like the Midwest, 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 conditioned space to the attic. Melted snow, in this case, is caused by heat loss. The heat loss is typically a combination of air leakage and conductive losses.
The air leakage is due to infiltration from the conditioned space and from leaky supply duct work and from penetrations of the ceiling lid. The conductive losses are usually from supply duct work and equipment located in attic spaces above ceiling insulation. Conductive losses also occur directly through insulation, or where insulation is missing or thin.
Attic ventilation can be accomplished by gravity ventilators, wind assisted ventilators or power ventilator. Regardless of the method used, the purpose is to provide uniform ventilation of the attic for proper temperature and moisture control.
The following diagram illustrates how the flow of air happens in your attic.
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