What is a whirlybird? No, we're not talking about helicopters, but a common roof ventilation system. Read our 5 tips about whether it's righ
Do you have a whirlybird on your roof? No, we’re not talking about helicopters here, but the distinctive-looking turbine-style roof vents that are designed to catch the wind so that the device spins and works without the need for an artificial power source, creating a vacuum that exhausts hot air and humidity out of a building.















