For new home construction that includes a vapor retarder the minimum is 1 square foot of ventilation for every 300 square feet of attic floor space.
Roof intake vent maintenance.
Hot air exhaust vents located at the peak of the roof allow hot air to escape.
A blocked vent can be caused by leaves dead animals and ice dams in very cold climates.
Attic ventilation is critical to the health of your house.
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During maintenance you ll want to be assured the top of the vent is kept open.
The exact number of intake and exhaust vents your roof needs is figured based on the square footage and volume of the attic area.
The goal of roof ventilation is to get fresh relatively cool air into the attic and vent out hot moist air.
Another not so common way the vent can become clogged is when a horizontal section of the venting system itself inside the attic is sloped the wrong way.
The best way to clean them is with blasts of compressed air to blow away dust dirt and any loose insulation that may have fallen into the soffit area.
The unique storm proof system will prevent weather infiltrations while still allowing fresh air intake thus preventing heat build up and moisture condensation which can lead to the premature wear of the building and its components.
This article describes products research on self closing soffit eaves ridge vents designed to reduce or stop the passage of embers into the roof cavity of a building through the building eaves or ridge during exposure of a building to nearby heat and fire from a forest fire brush fire or adjacent building fire.
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Self closing ridge soffit eave vents for fire protection.
Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic.
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In order to create a consistent flow of cool dry air through your attic you need to make sure the air has a way to come in and go out.
It s important there is a balance between the intake and exhaust ventilation to help ensure air flows smoothly and efficiently.
The fresh air intake enters directly into the attic space from the roof to allow for attic air circulation in combination with the maximum roof ventilators.
According to most building codes you need 1 square foot of ventilation for every 150 square feet of attic floor space.
