Attic ventilation is done to cool the insulated ceiling space in a home.
The vents allow air to enter into the space between the ceiling and the roof. This space sometimes has damp air or due to hot weather it gets quite stuffy. The insulation applied in the ceiling space in the attic sometimes produces vapor. The cool air in the from the vents assists in removing this mist air. The vents are done on two opposite walls in the roof space for cross ventilation to take place.
Attic ventilation is done on the gable walls opposite each other. This are the triangular walls in the home after the ring beam. The size of the vent space is about two feet by two and a half feet wide. They are usually timber louvers fixed in a frame work. They should allow air passage into the roof space without letting in rain water.
