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Old Metal Roof Replacement Melbourne
Replace your aging, rusted galvanised roof with a new Colorbond roof built to resist corrosion and last decades. Get an inspection & quote.
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BM Roof Plumbing rated 5.0/5 based on 189 reviews.
Why Old Metal Roofs Reach the End of Their Life
Old galvanised roofs rely on a zinc coating that wears away over time. Once that coating is gone, the steel underneath is exposed and the problems start to compound. Patch repairs slow it down but rarely stop it, which is why replacement usually becomes the smarter long-term call.
Corrosion & Structural Deterioration
Once the zinc coating wears away, rust spreads rapidly, sheets thin out and weaken, and corroded fixings increase the risk of failure.
Ongoing Leaks & Water Damage
Pin holes, rust-through, failed laps, and corroded fixings let water in, and the constant patch repairs simply don't last.
Rising Maintenance Costs
Frequent rust treatment, patch repairs, and repainting add up to a roof that costs more to keep going every year.
Poor Thermal Performance
Older galvanised roofs often lack insulation and reflective coatings, leaving homes hotter in summer, colder in winter, and more expensive to run.
New Colorbond Roof Replacement Done Right
We strip the old galvanised sheets, check over the structure underneath, and install a new Colorbond roof in their place. Colorbond steel uses a multi-layer protective coating that resists corrosion far longer than old galvanised stock, and we lay it with modern flashings throughout so the roof is watertight as a system rather than relying on sealant and patches.
Long-Term Corrosion Resistance
Colorbond's advanced steel and multi-layer coating resist rust far longer and perform better in coastal and harsh conditions.
Continuous, Watertight Sheets
New continuous sheets and modern flashing systems mean no more pin holes, failed laps, or recurring leaks to chase.
Lower Maintenance Costs
Colorbond is designed for low maintenance and long-term performance, lowering the total cost of owning your roof over time.
Better Comfort & Street Appeal
With an insulation blanket and a clean modern finish, the new roof improves year-round comfort and adds real value to the home.
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.
Trusted by 189+ Melbourne Home Owners
We recently had BM Roofing repair our roof from hail damage (old laser light changed to corrugated steel). The BM team were fantastic! They arrived on time, did the job and cleaned up. I would highly recommend them.
Lorna W Home OwnerBM Roofing were very easy to deal with from the quote to Colorbond roof replacement completion. Very reliable, turning up on time, with Corey and his team doing a high quality job to replace our rusty roof. Area cleaned up and rubbish removed with no damage to our other slate roofing. Thanks guys.
Greg N Home OwnerBilly and his crew from BM Roof Plumbing were great to deal with. Their work to partially replace and amend our roof was exceptional. Site left clean and tidy which we appreciate. A+ Thanks Billy
Robert L Home Owner
Get a roof inspection
If your old metal roof is rusting, leaking, or just past its best, contact us for a no-obligation roof inspection and we'll let you know the best way to solve it.
- Phone 0448 936 748
Frequently Asked Questions About Old Metal Roof Replacement
Yes. Many old metal roofs are replaced before major leaks start, especially when rust is spreading, fixings are failing, or the roof has reached its expected lifespan. Replacing early can prevent timber damage and ceiling repairs later.
Galvanised steel is protected by a zinc coating. Over decades that coating wears away, and once the bare steel is exposed rust spreads quickly, thinning the sheets and corroding the fixings.
Colorbond uses advanced steel with a multi-layer protective coating that resists corrosion far longer than old galvanised stock, performs better in harsh and coastal conditions, and needs much less maintenance over its life.
It can. Older galvanised roofs often have no insulation and bare metal surfaces. A new Colorbond roof can be installed with an insulation blanket and thermally efficient coatings, improving comfort and helping reduce heating and cooling costs.
We assess everything as part of the inspection. Old fixings, flashings, gutters, and downpipes are often at the end of their life too, and replacing them alongside the roof gives you a watertight system rather than a new roof tied into worn-out components.