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Dallas Roofing: Article About Ventilation

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Ventilation is not only a requirement under the national building codes, but it is also essential for a home's structural integrity, function of the roof and comfort of the residents. National guidelines require that houses have a specific ratio of ventilation although the needs depend upon a few additional factors such as the inclusion of water barriers. Property owners can work with an experienced Dallas roofing service to ensure that their house has the right balance of incoming and outgoing air ventilating the attic and roof.

The most common vents found on a home are passive vents. These do not require any electrical power and are always open to the outdoors. The vent's opening usually has some sort of a cover, which might consist of mesh wire, angled slats or louvered doors. The national building code guidelines require a minimum of 1 square foot of vent opening to every 150 square feet of roof surface. If the roofers have placed a vapor barrier, a lower ratio of 1 to 300 is required. Any vapor barriers must be installed on the interior side, which is warmer in the wintertime.

Types of passive air vents for intake include soffit and cornice vents.

The roofing experts at Total roofing of Dallas TX can assist you with any questions regarding gutters or emergency repairs.

These are located around the roof's eaves and are not visible from the curb. Homes that do not have an adequate overhang for the installation of regular soffit vents can use continuous vents, which run along the roof's perimeter and are only a few inches wide.

Exhaust vents are typically located at the roof's highest point. This is because hot air rises and can be passively ventilated to the environment through static openings. Passive exhaust vents include ridge and gable vents. They are matched in color to the home's siding, shingles or tiles and typically last for as long as the home's other exterior materials. They do not require any maintenance other than removing obstructions, such as birds' nests, that might occasionally develop. Turbines are large and tricky to install but operate with a minimal amount of noise. A turbine moves as a result of airflow already occurring in an attic, and they work best on roofs with a moderate to steep slope.

Power ventilators are another way to achieve the recommended rate of ventilation underneath the rooftop. These systems can include whole house or attic fans as well as vents that have powered louvers. Some of the newest technology for venting equipment includes solar powered vents that open when the sun is shining and close at night.

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