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 MelbourneSouthern SuburbsBentleigh
Dulux Accredited Applicator
Whirlybird Installation
in Bentleigh.
Bentleigh's interwar and mid-century homes were built well before roof ventilation was standard practice, so the roof cavity on most of these houses has no real way to shed heat or moisture on its own.
10-Year Warranty
Melbourne & Surrounding Suburbs
4.9 Rating | Google Reviews
10yr Warranty
Fully Insured
Family Owned
Postcode3204
RegionSouthern Suburbs
Common roof stockTerracotta tile · Concrete tile · Colorbond / metal
NCC climate zoneZone 6
Whirlybird Installation · Bentleigh
Why Bentleigh roof cavities overheat
Bentleigh's interwar and mid-century homes were built well before roof ventilation was standard practice, so the roof cavity on most of these houses has no real way to shed heat or moisture on its own. A whirlybird fixes that using nothing but wind and rising hot air, continuously drawing warm, humid air out of the cavity rather than letting it sit and bake the ceiling below in summer. Through winter, the same airflow clears condensation that would otherwise sit in the roof space and slowly affect the timber. We flash every turbine into the tile course properly so the roof stays fully weatherproof.
Bentleigh's older brick homes with original, unventilated roof cavities near the Centre Road strip hold summer heat well into the evening, which is where whirlybirds make the most noticeable difference indoors.
Local roof weather
Roof weather in Bentleigh
Bentleigh 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.
~125
rain days a year
days with measurable rain
November
wettest month
when a sealed roof earns its keep
~6
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 Bentleigh: °C,
Annual rainfall: 750–800 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 Bentleigh
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 · Bentleigh
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What Melbourne homeowners say
Bentleigh whirlybird installation — your questions
Most standard three-bedroom homes need two to four turbines depending on roof area and pitch. We measure your specific roof rather than quoting a generic package.
Not if it's flashed correctly. We bed the flashing under the tile course and seal it properly, which is where poorly installed turbines usually go wrong.
Very much so. Interwar and mid-century roof cavities here were built with no ventilation at all, so adding it makes a real difference to summer heat and winter moisture in the roof space.
Ready to sort your Bentleigh roof?
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