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Whirlybird Installation Melbourne
Whirlybird installation across Melbourne's Eastern Suburbs by experienced roof plumbers. Properly placed, properly flashed, and properly sealed — so your roof space breathes without becoming a leak risk.
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BM Roof Plumbing rated 5.0/5 based on 189 reviews.
Heat and moisture trapped in the roof space cause problems on every level below it.
A poorly ventilated roof space can sit well above 50°C in summer. That heat radiates down through the ceiling and pushes the load on your air conditioning straight up. In winter, moisture from inside the home rises into the roof and has nowhere to go — which leads to condensation, damp insulation, and over time, mould and timber rot.
Whirlybirds are a simple fix for both. They use natural airflow to draw hot, moist air out of the roof space and pull cooler, drier air in through the eaves. No power, no maintenance, no complications — when they're installed correctly.
The catch is that "installed correctly" gets skipped a lot. The cuts have to land in the right spot relative to the roof structure. The flashing has to be formed and sealed for the specific roof profile, whether it's Colorbond corrugated, trimdec, or tile. And the number and position of whirlybirds has to actually match the roof area — one unit on a 200m² roof isn't doing much.
A whirlybird put in by someone who doesn't deal with metal roofs every day is a leak waiting to happen. Flashings that don't sit flat, sealants that crack in a year or two, screws driven into the wrong rib — all of it ends up showing up as a stain on the ceiling.
We install whirlybirds the same way we install everything else: planned, flashed properly, and finished neatly. No leaks, no callbacks.
- 189 +
5 Star Google Reviews
- 10 +
Years Of Metal Roofing Experience
- 500 +
Melbourne Roofing Jobs Complete
Whirlybirds Installed by Roof Plumbers Who Know How to Flash a Metal Roof
We're based in Bayswater North and install whirlybirds across Melbourne's Eastern Suburbs on Colorbond, corrugated, trimdec, and tiled roofs. With over 10 years of roof plumbing experience, the flashing detail around a whirlybird is exactly the kind of work we do every day — so it gets done properly the first time.
Before any cuts are made, we work out how many whirlybirds the roof actually needs based on the roof area, the type of insulation, and how the eaves are vented. There's no point putting in a single unit if the roof is too big for it to make a difference, and there's no point at all if the eaves can't draw air in.
Each whirlybird is positioned high on the roof — close to the ridge where heat collects — and away from valleys, ridges, and other points where water tracks. The opening is cut clean, the flashing is formed to match the roof profile, and the whole thing is sealed and screwed down so it stays watertight in heavy rain and strong wind.
We install whirlybirds as a standalone job and as part of larger roof installations and replacements. If you have an existing roof that needs better ventilation, or you're already getting a new roof and want it set up properly from day one, get in touch.
Get A QuoteTrusted by 189+ Melbourne Home Owners
Billy is very patient with my requests and questions, and his team are friendly. They have replaced a gutter, chimney flashing and installed a spreader on our roof, and didn’t leave any rubbish behind. They did a good job.
Jane P Home OwnerBM Roof Plumbing provides a thoroughly professional service. We had valleys needing replacement, as well as re-mortaring ridge tiles which had been done previously by another operator.
Simon R Home OwnerBilly was super efficient and found and fixed the problem straight away. Thanks so much, highly recommend.
Caleb O Home Owner
Get a roof inspection
If you're struggling with leaks, damage or just an old roof then contact us for a no-obligation roof inspection so that we can come out and let you know the best way to solve your roofing problem.
- Phone 0448 936 748
Frequently Asked Questions About Whirlybird Installation in Melbourne
Yes, when there's enough of them and the eaves can draw air in. A whirlybird uses natural wind to spin and pull hot, moist air out of the roof. As long as the system is sized correctly for the roof area and the eaves aren't completely sealed, they make a real difference to roof space temperature and moisture.
It depends on the roof area, the pitch, and how the roof is insulated. As a rough guide, an average suburban home generally needs two whirlybirds for proper ventilation, and larger or more complex roofs need more. We work this out during the inspection so you're not under-spec'd or paying for ones you don't need.
Not when it's installed properly. Leaks come from poorly cut openings, flashings that aren't formed to the roof profile, or sealants doing the job a flashing should be doing. Done by an experienced roof plumber, the whirlybird becomes a sealed part of the roof, not a weak point in it.
Yes. We install whirlybirds on Colorbond, corrugated, trimdec, and tiled roofs. The flashing detail differs between profiles, so the right base is fabricated or selected for each specific roof.
No. The shape of the cowl is designed to deflect rain even while spinning, and the flashing keeps water out at the roof line. The only time water becomes an issue is when a whirlybird has been installed badly or has reached the end of its life and the bearings have failed.
A new whirlybird with good bearings is essentially silent. Noisy whirlybirds are usually older units where the bearings have worn out — at that point, the unit is overdue for replacement rather than just lubrication.
For a typical home, installing two whirlybirds is generally a half-day job, depending on roof access and the type of roof. We confirm the timing once we've seen the roof.
Yes. We provide free quotes for whirlybird installation across Melbourne and the Eastern Suburbs. Get in touch to arrange a time that suits you.
We service Melbourne with a strong focus on the Eastern Suburbs, including Bayswater, Boronia, Wantirna, Ringwood, Ferntree Gully, and surrounding areas.
Recent Installation Projects
View All Projects- Kilsyth, Melbourne
Full Colorbond Re-Roof in Kilsyth
A complete re-roof on this Kilsyth home — the old roof stripped right back and replaced with new Colorbond throughout, with every hip, valley, chimney and penetration flashed and finished properly. A new roof makes a difference to the whole property, and this one came up sharp.
- Melbourne
Weathered Metal Roof Upgraded to New Colorbond
A much-needed upgrade for a tired existing metal roof — rusting ridge cappings, a corroded valley and weathered sheets replaced with a new Colorbond roof. The before and after from the same spot on the roof says it all.
- Eltham, Melbourne
Colorbond Re-Roof in Eltham
Stripped a badly rusted old corrugated roof and replaced it with a brand-new Colorbond roof in Monument. The before and after says it all — a clean, watertight, low-maintenance roof that completely transformed the look of the home.
- Malvern, Melbourne
Steep Pitch Metal Roof Installation in Malvern
Another job done right — a steep 45° pitch section that called for extra care with safety, set-out, and flashing detail. The result is a clean, sharp Colorbond finish that sheds water perfectly and sits flush around every skylight, valley, and the chimney.
- Melbourne
Old Galvanised to New Colorbond Roof Replacement
Stripped a rusted-out galvanised roof that had reached the end of its life and replaced it with a new Colorbond roof. No more rust-through and patch repairs — just a continuous, watertight, low-maintenance roof built to last decades.
- Belgrave, Melbourne
Skylight Installation & Roof Upgrade in Belgrave
Replaced tired polycarbonate roof sheeting and aging metal with a new Colorbond roof and purpose-made skylights. Cleaner finish, no more stained polycarbonate, and proper natural light without the heat and leaks.
- Gembrook, Melbourne
Tile to Metal Roof Replacement in Gembrook
Full tile-to-Colorbond re-roof on a 1970s home. Stripped the old tiles, installed a 0.60mm Colorbond roof with R1.3 insulation blanket, added whirly bird ventilation, and fitted new gutters and downpipes throughout.
- Melbourne
Polycarbonate Sunroom Roof Replacement in Melbourne
Replaced an old, leaking sunroom roof — yellowed polycarbonate that had been patched with shade mesh to slow the leaks — with new twin-wall polycarbonate. A watertight, bright sunroom again, finished in a single day with a certificate of compliance.
