1
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 MelbourneNorthern SuburbsReservoir
Dulux Accredited Applicator
Whirlybird Installation
in Reservoir.
Reservoir's post-war homes were mostly built with minimal roof ventilation, so on hot days the cavity above the ceilings turns into a heat store that radiates down into the bedrooms all evening.
10-Year Warranty
Melbourne & Surrounding Suburbs
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10yr Warranty
Fully Insured
Family Owned
Postcode3073
RegionNorthern Suburbs
Common roof stockConcrete tile · Terracotta tile
Separate houses63.2%
Elevation89 m
NCC climate zoneZone 6
Whirlybird Installation · Reservoir
Why Reservoir roof cavities overheat
Reservoir's post-war homes were mostly built with minimal roof ventilation, so on hot days the cavity above the ceilings turns into a heat store that radiates down into the bedrooms all evening. Whirlybirds — turbine roof vents — let that hot, trapped air escape. On the concrete-tile roofs that dominate Reservoir we lift the tiles at the vent location, cut a neat penetration, bed the flashing so it is fully weatherproof, then seat the turbine and reinstate the tiles over the apron. A few correctly placed vents make a real difference to how the upstairs feels on a hot day, and in winter they clear the warm, damp air that would otherwise condense in the roof and feed mould.
Reservoir gets around seven days over 35 degrees a year, and on those days an unventilated post-war roof cavity holds the heat well into the night — which is exactly what a couple of turbines are there to release.
Local roof weather
Roof weather in Reservoir
Reservoir sees around ~7 days above 35°C a year, and on those days an unventilated roof cavity turns into a heat store right above your ceilings.
~120
rain days a year
days with measurable rain
November
wettest month
when a sealed roof earns its keep
~7
days over 35°C
why a cured coating matters
Extreme (11–13)
summer UV
what a fresh coating shrugs off
Melbourne UV now:
Now in Reservoir: °C,
Annual rainfall: 700–750 mmest.
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
How we install a whirlybird
2
Position for airflow
Vents go high on the roof where the hottest air collects, balanced with the eave intake so air can actually move through.
3
Cut & flash
On a tiled roof we lift the tiles, cut a neat penetration, and bed the flashing so it is fully weatherproof.
4
Seat & seal
The turbine is seated in the flashing collar and the tiles are reinstated over the apron, leaving a clean, leak-free finish.
Roof types in Reservoir
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.
Our standard
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 · Reservoir
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What Melbourne homeowners say
Reservoir whirlybird installation — your questions
It depends on roof area and pitch, but most homes here need two to four turbines placed high on the roof to move air effectively. We assess your roof and recommend the right number rather than overselling.
They release the heat that builds up in the roof cavity and radiates down into your rooms, which eases the load on cooling. They are not an air conditioner, but on Reservoir's hot days the difference upstairs is noticeable.
Not when it is flashed correctly. The failure point on cheap installs is the flashing, so on Reservoir's tile roofs we bed and seal it under the tile course for a fully weatherproof finish.
Yes. In winter the warm, moist air that rises into the roof condenses and feeds mould. Venting it out protects the roof structure and insulation year-round, not just in summer.
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