The short version
Most Melbourne homeowners deciding between steel and tiles are really asking three questions. Can my house carry it? Will I be allowed to use it? And which compromises do I care about most? Once those are answered, the choice usually becomes obvious.
Pre-painted steel, widely known by the Colorbond name, is light, quick to install and good at keeping embers out. Tiles, whether concrete or terracotta, are quiet, thermally stable and in keeping with much of Melbourne's older housing. Each has a cost profile, a maintenance pattern and a set of situations where it clearly makes more sense.
How the two compare
| Factor | Colorbond steel | Concrete or terracotta tiles |
|---|---|---|
| Weight on the frame | Light | Heavy |
| Minimum pitch | Can run very low | Needs a steeper slope |
| Rain and hail noise | Noticeable without insulation | Quiet |
| Heat in the roof space | Depends on colour and blanket | Thermal mass evens out swings |
| Ember resistance | Strong when gaps are sealed | Can comply, more gaps to detail |
| Upkeep | Low, watch fixings and cut edges | Ridge pointing, and coatings on concrete |
| Impact damage | Can dent in big hail | Individual tiles can crack |
| Relative cost | Usually lower for a full re-roof | Usually higher, terracotta highest |
| Heritage streetscapes | May need a planning permit | Often the expected finish |
Where steel makes the case
Light frames and low pitches
Steel weighs a fraction of what tiles do. If you are adding a second storey, building a rear extension at a gentle slope, or replacing a roof on a frame that has started to sag, steel takes pressure off the structure. Low-pitched skillions across Melbourne are almost always metal for exactly this reason.
Bushfire-prone blocks
On properties in or near a Bushfire Management Overlay, especially in the outer east and Cardinia Shire, steel's large sheets and sealable gaps make ember protection easier to achieve. Your Bushfire Attack Level under Australian Standard AS 3959 decides the detailing required, and CFA's home preparation advice is worth reading alongside it. See our piece on preparing your roof for bushfire season.
Tile-to-steel conversions
Thousands of brick veneer homes from the 1960s to 1980s still carry their original concrete tiles. When those tiles have lost their coating, leak at the valleys and need re-pointing every few years, many owners convert to steel. The job involves stripping tiles, changing battens to suit steel fixings, adding a blanket, and new flashings. Done well, it ends years of patch repairs. Our metal roof replacement page explains the process in more depth.
Where tiles make the case
The house was built for them
A Californian bungalow in the inner east or a cream-brick home from the 1950s was designed around a tiled roof. The eaves, the pitch and the proportions all assume it. Re-tiling keeps the look intact, and the frame is already sized for the load.
Heritage and neighbourhood character
In parts of the City of Yarra and other inner councils, a Heritage Overlay can mean that a change from tiles or slate to steel needs a planning permit, and approval is not guaranteed. Even outside an overlay, some owners prefer a roof that matches the street. Our tiled roof replacement page covers re-tiling options.
Comfort and quiet
Tiles have thermal mass, which slows heat moving into the roof space on hot northerly days and holds warmth a little longer on cold nights. They are also quieter during a downpour. Steel can match much of this with a good blanket and insulation, but tiles do it by default.
Melbourne-specific trade-offs
- Hail. Summer storms can dent steel and crack tiles. Dented steel usually still keeps water out; a cracked tile may not. Either way, storm damage is often covered by home insurance while wear and tear usually is not, so check your policy.
- Salt air. Near the bay and on the Mornington Peninsula, choose steel and fasteners suited to coastal exposure. Tiles are unbothered by salt, though their flashings still need the right grade of metal.
- House movement. On reactive clay in the west and north, mortar-bedded ridges on tiled roofs crack as walls shift. Flexible pointing compounds help. Steel ridge capping is screwed down and is less affected.
- Leaf litter. Gum leaves pile up in tile valleys and behind tiles. Steel sheds them more readily, though gutters still need clearing.
Living with each roof over the years
A steel roof asks for little attention. Rinse the areas under eaves that rain never reaches, especially near the coast, keep gutters clear so water does not pond against the sheet ends, and have someone check screws and flashings after a big storm. Scratches from foot traffic or dropped tools should be touched up with the correct paint rather than left to rust.
A tiled roof needs a closer look every few years. Ridge pointing can crack, valley irons can corrode, and a single slipped tile lets water in during wind-driven rain. Concrete tiles gradually lose their surface coating and grow moss on shaded faces, which is when owners start weighing up restoration against replacement. Terracotta ages more gracefully but can be harder to patch, because matching an older profile is not always possible.
Neither routine is onerous. The difference is that tile roofs tend to need small, regular jobs, while steel roofs tend to need very little until something specific goes wrong. Our guide to roof replacement versus roof repair can help when you reach that crossroads.
Cost: the order, not the number
In broad terms, a steel re-roof usually comes in below re-tiling in new concrete tiles, with new terracotta higher again. Restoring an existing tile roof is a different, smaller job and should not be compared directly with replacement. What actually moves your quote is roof area, pitch, number of storeys, access, scaffold and edge protection, hips and valleys, and whether gutters and fascias are included.
For planning ranges in dollars, see our roof replacement price guide. Ask each contractor to price the same scope so the comparison is fair.
Questions to put to every contractor
When quotes arrive, the useful ones explain the reasoning behind a recommendation. Ask:
- Why steel or tiles for this particular roof, and what would change your view?
- What sits under the new covering: blanket, sarking, insulation?
- Will battens be replaced, and do they suit the new material?
- Are gutters, fascias, downpipes and flashings included?
- Is a building or planning permit likely, and who will check?
- Who holds the roof plumbing registration, and will a compliance certificate be issued for the plumbing work?
Roof plumbing registration in Victoria was managed by the Victorian Building Authority until its functions passed to the Building and Plumbing Commission in 2025, so look up the current register directly.
Getting both options priced
Roof Repair Melbourne VIC can arrange free on-site quotes from independent local contractors, and you are welcome to ask for steel and tile options on the same visit. We ask the contractors we work with to hold appropriate registrations and insurance, but it is still worth sighting those documents before work begins. If you want to compare the two properly, request a quote and say you would like both priced.