Assess the cavity
We look at roof size, pitch and existing airflow to work out how many vents you actually need — no over-selling.
Whirlybird Installation MelbourneSouthern SuburbsGlen Huntly
Glen Huntly's interwar bungalows and 1960s-70s brick flats were both built well before roof ventilation was standard, so their roof cavities tend to hold onto heat through summer evenings and trap moisture over winter, especially on the more shaded blocks under the suburb's established street trees.
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Whirlybird Installation · Glen Huntly
Glen Huntly's interwar bungalows and 1960s-70s brick flats were both built well before roof ventilation was standard, so their roof cavities tend to hold onto heat through summer evenings and trap moisture over winter, especially on the more shaded blocks under the suburb's established street trees. A whirlybird uses wind and rising heat to draw that stale air out continuously rather than letting it sit under the terracotta or concrete tile. On period terracotta roofs we flash the turbine in carefully to suit the existing tile course; on newer concrete tile or Colorbond homes it's a more straightforward fitting. Either way, venting the cavity eases the heat load upstairs and helps stop condensation building up in the roof timbers.
Between Glen Huntly's older, pre-ventilation homes and a moderate tree canopy that keeps some roofs shaded and damp, a whirlybird's constant airflow helps with both the summer heat load and the moisture that builds up in a poorly vented cavity.
Local roof weather
Glen Huntly sees around ~6 days above 35°C a year, and on those days an unventilated roof cavity turns into a heat store right above your ceilings.
Climate normals (2015–2024) from Open-Meteo ERA5 reanalysis — gridded reanalysis, so rainfall is an estimate that runs a little high versus long-term gauge averages. Live UV from ARPANSA, live conditions from Open-Meteo.
The process
We look at roof size, pitch and existing airflow to work out how many vents you actually need — no over-selling.
Vents go high on the roof where the hottest air collects, balanced with the eave intake so air can actually move through.
On a tiled roof we lift the tiles, cut a neat penetration, and bed the flashing so it is fully weatherproof.
The turbine is seated in the flashing collar and the tiles are reinstated over the apron, leaving a clean, leak-free finish.
Installation differs by roof: on tiled roofs we cut and flash the penetration under the tile course, while on metal roofs the vent is flashed directly into the sheeting. Both need the flashing done properly — a rushed vent install is a classic future leak.
Installations are carried out by an insured team and the workmanship is backed by a 7-Year Workmanship Guarantee and a 10-Year Dulux Acratex Material Warranty.
Current offer · Glen Huntly
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