Why material price is only part of the picture
When homeowners ask how much a particular roofing material costs, they usually want to know what the whole job will cost if they choose it. Those are different questions. The sheets or tiles themselves are one part of a quote. Labour, scaffold, removal of the old roof, new battens, flashings, gutters and waste disposal often add up to more than the covering does.
So this guide does two things. It explains the usual order in which common materials sit on price for a Melbourne re-roof, and it explains the factors that can push a cheaper material above a dearer one on a particular house. If you need dollar ranges for budgeting, they are in our roof replacement price guide.
The usual price order, from lowest to highest
For a full replacement on a typical single-storey Melbourne home, the materials generally line up like this:
- Unpainted Zincalume steel. Often the most economical sheet option, more common on sheds and extensions than main roofs.
- Pre-painted steel such as Colorbond. The most common full re-roof material. Light, quick to fix and needing fewer labour hours than tiles.
- Concrete tiles. Heavier and slower to lay than steel, with more pieces to handle and more pointing at ridges and hips.
- Terracotta tiles. Fired clay costs more to make, glazed finishes cost more again, and the tiles are slower to handle and cut.
- Slate. Expensive stone, individual fixing, specialist labour and frequent heritage requirements put it at the top.
Asbestos removal is not a material choice, but if your existing roof contains asbestos cement sheeting, the removal stage adds significantly to whatever you replace it with. More on that below.
What drives the cost of each material
Steel
Steel's advantage is labour. Large sheets cover a lot of roof quickly, and the light weight means fewer trips up the ladder. What adds to the price:
- Choosing a coastal-grade product for homes near the bay.
- A reflective blanket for heat and noise control, which most installers recommend.
- Changing battens when converting from tiles, because tile battens are not set out for steel fixings.
- New flashings, ridge capping and, often, gutters and downpipes.
Concrete tiles
Concrete tiles are moderately priced as a product, but laying them takes longer than steel. Each tile is handled individually, ridges and hips need bedding and pointing, and valleys need careful work. Because they are heavy, scaffold and lifting matter more. Sarking under the tiles is a sensible addition and is sometimes required.
Terracotta tiles
Terracotta costs more to produce and is more brittle to handle, so breakage and cutting waste add a little. Profiles designed to suit older homes can be dearer than standard ones, and glazed finishes cost more than natural. Our page on terracotta roof replacement covers the choices involved.
Slate
The product itself is costly, and laying slate is slow and skilled. Many Melbourne slate roofs sit on Victorian and Edwardian terraces in suburbs like Richmond, where access is tight, neighbours are close and box gutters often need replacing too. If a Heritage Overlay applies, the council may also expect particular materials or detailing. See slate roof replacement.
Factors that can outweigh the material
Two homes choosing the same material can receive very different quotes. These are the usual reasons.
| Factor | Why it moves the price |
|---|---|
| Roof area | More square metres means more material and labour |
| Pitch | Steeper roofs are slower and need more safety equipment |
| Storeys | Double-storey work needs more scaffold and lifting |
| Access | Narrow side paths and close neighbours slow everything down |
| Complexity | Hips, valleys, dormers and penetrations add cutting and flashing |
| Battens and sarking | Replacing these adds materials and time |
| Gutters and fascias | Including them adds to scope but avoids a second job |
| Old roof removal | Stripping and disposal costs vary, especially for heavy tiles |
| Asbestos | Licensed removal and regulated disposal add a separate stage |
| Heritage | Specific materials and detailing can be required |
Asbestos changes the budget
Many homes built before the late 1980s have some asbestos cement in the roof, eaves or flues. Under WorkSafe Victoria's rules, removing more than 10 square metres of non-friable asbestos requires a licensed removalist. EPA Victoria regulates how the waste is transported and disposed of. Never attempt removal yourself. Our guide to safe asbestos roof removal explains what is involved.
Permits and certificates
Like-for-like re-roofing often does not need a building permit in Victoria, but changing to a heavier material, altering the roof shape or building in a Bushfire Management Overlay or Heritage Overlay may need a building or planning permit. A registered building surveyor or your local council can confirm. Roof plumbing work, including sheet roofing, flashings and gutters, should be done by someone registered or licensed for it, with a compliance certificate issued for qualifying work.
Long-term value versus upfront price
A lower quote is not always the cheaper roof. Consider how often each option needs attention:
- Steel needs little maintenance but should be kept clean in coastal areas.
- Concrete tiles lose their surface coating with age and may eventually need restoration.
- Terracotta holds its colour and usually needs less upkeep than concrete.
- Slate can last a very long time if the fixings and flashings are kept in good order.
Running repairs on a tired roof add up over the years. If you are paying for patch jobs on a regular basis, it may be time to compare a full replacement, which our article on roof replacement versus repair can help with.
Sensible ways to keep the total down
There are legitimate ways to trim a roofing budget without cutting corners on safety or weatherproofing:
- Bundle related work. If gutters and fascias are near the end of their life, replacing them while scaffold is already up avoids paying for access twice.
- Choose a standard profile. Common tile profiles and sheet styles are usually easier to source than specialty ones.
- Be flexible on timing. Contractors' schedules vary through the year, and a job that can wait for a clear window is easier to plan.
- Fix the cause, not just the symptom. If a leak comes from a failed valley, replacing tiles around it will not solve anything.
What not to trim: sarking or blanket where it is recommended, proper edge protection, and correct disposal of old material. Those savings tend to cost more later.
Comparing quotes fairly
When quotes arrive, make sure they cover the same scope. Check that each lists the material, profile and colour, whether battens, sarking or blanket are included, whether gutters and downpipes are part of the job, how old roofing will be disposed of, and who is responsible for any permit.
Roof Repair Melbourne VIC arranges free on-site quotes from independent local contractors. We ask those contractors to hold the registrations and insurance their work requires, and you should ask to sight them before work starts.