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Plano Roofing: Article About How To Ventilate A Roof

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The roof's ventilation system is one of the most important roofing systems that keeps the attic cool and dry. The vents or fans draw cool air in from the outside and allows hot air to be released so that the shingles do not become damaged. There are two main types of ventilation systems: passive ventilation and active ventilation. An expert Plano roofing contractor can help determine which type of ventilation system is right for a particular home.

Passive ventilation systems use the differences in air pressure between the outside environment and the inside environment. Normally, vents are installed in the soffits to pull in cool air. This cool air then heats up in the attic and rises to the top. The hot air then either escapes through a vent located along the ridge of the roof or through a gable vent. This process creates a vacuum that keeps the air moving throughout the home.

However, some homes do not have soffit vents. To get around this, some roofers install a vented drip edge along the lower edge of the roof. The vented drip edge is usually installed along the top of the fascia.

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These vents may be paired with traditional box vents, a ridge vent or a gable vent. The downside to this ventilation system is that the vented drip edge does not intake as much air as soffit vents.

Ridge vents may also be used on their own. Some ridge vents have an external baffle system that allows them to pull in colder air and push out warm air. They work by creating low pressure areas on both sides of the ridge vent.

Active ventilation systems use moving parts to pull in cool air. These devices include fans and wind turbines that pull the air into the attic and push the hot air out. Because the fans can move large amounts of air in a very short time, it is recommended that these fans be used in areas where the air is often very hot and stagnant. The downside to active ventilation systems is that they require energy to run.

No matter which ventilation system is installed, it is extremely important that the vents or fans are installed properly. If the system is not properly installed, condensation and moisture could accumulate in the attic space and cause some serious problems down the line. By having a roofing contractor install the ventilation system, homeowners can ensure that they'll have a properly working attic.

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