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.
Roof intake vent maintenance.
You should clean soffit eave and other types of attic air intake vents at least every couple of years if not annually.
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.
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Attic ventilation is critical to the health of your house.
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Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic.
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.
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.
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.
During maintenance you ll want to be assured the top of the vent is kept open.
Hot air exhaust vents located at the peak of the roof allow hot air to escape.
The goal of roof ventilation is to get fresh relatively cool air into the attic and vent out hot moist air.
The exact number of intake and exhaust vents your roof needs is figured based on the square footage and volume of the attic area.
A blocked vent can be caused by leaves dead animals and ice dams in very cold climates.
Certainteed intake vent provides continuous intake airflow at the roof s edge and provides proper intake ventilation for homes with little or no overhang.
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.
Self closing ridge soffit eave vents for fire protection.
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It s a roof top installed shingle over intake vent that can be used to supplement existing soffit or undereave vents.
