Roof ventilation is necessary for getting the right humidity and temperature levels for your home. There are many different methods of adding ventilation to the attic spaces of your home including mechanical and non-mechanical methods.
Mechanical vents require an electrical supply thus requiring an electrical outlet to be installed in the attic which may not always be convenient. They also generate noise though this is rarely a problem unless the attic space is used as a room.
To have cool air flowing through the attic and hot air flowing out, you will need to have both exhaust and intake vents installed. To determine the extent of the installation required, you should also consider the volume of the room. This article describes the various roof ventilation options available.
Cheap and relatively easy to install, soffit vents are a popular option for ventilating the roof. They are installed along the underside of the roof, providing intake ventilation while cooler air is moved into the attic.
These type of vents run along the edge of the roof at the ridge, where the faces of the roof meet. They normally run along the entire length of the roof and they can be particularly effective since no hot air gets trapped above them.
Hence the name, they are installed in the gables below the apex of the attic roof. Because of this, hot air can sometimes get trapped by rising above the vent. More effective vents of this type are powered by a motor.
Roof vents can be installed on the face of the roof itself. If they installed higher up, they replace the necessity for gable or ridge vents for exhaust purposes. They are rarely used for purposes of taking in colder air from outside.
Mechanical Roof Vents
Mechanical roof vents tend to be the most powerful and effective. However, they do cost money to run, they can be more complicated to install and they can also generate noise. These roof vents can be used as intake or exhaust vents entirely dependent on the direction of the rotor. Depending on its operation, this kind of installation takes in the air from outside, bringing it inside or vice versa. They also work well in any weather conditions but bear in mind that they also need to be switched on to do anything at all. Though of course, they do cost money to run, the power requirements are minimal and usually negligible. Additional wiring to your roots may also be necessary, making it a lot more expensive to install in the first place.
The most common types of roof ventilation installations are non-mechanical. These do not require the power of the motor and thus, are a lot easier and cheaper to install. High position roof vents can be used for exhaust purposes. Once installed in lower portions of the roof, soffit vents can be used for taking in air from outside.