An older roof does not automatically need replacing. If the tiles and frame are still sound, a repair or restoration, such as rebedding and repointing and replacing a few porous tiles, can keep it going for years. Replacement makes sense when the tiles themselves are failing across the roof. We spoke with James, a Royce roof tiler with 11 years’ experience, on a 30-year-old roof in Wheelers Hill.
The short answer
- Age alone does not decide it: look at the tiles, the bedding and the structure
- Repair or restore when tiles are sound and the bedding and pointing are tired
- Re-roof when tiles have become porous or are failing across the roof
- Signs to watch: cracked or porous tiles, mortar in gutters and valleys, leaks
- A restoration typically costs a fraction of re-roofing
An older roof does not always need replacing
The Wheelers Hill house had its original cement tiled roof, around 30 years old. It was showing its age, but James considered its overall integrity quite solid and not at the stage of needing a complete re-roof. He estimated that with the right work it could last another 10 to 15 years.
The integrity of it is quite solid. It’s not at reroof stage yet. We can definitely just do a repair and it will last the next 10 to 15 years. The house and the roof have good bones.
The approach was to maintain what was already there, and replace the whole roof later, when it is actually needed.
What the work involved
The job was rebedding and repointing. James explained that it means removing the old mortar, cleaning everything up and making sure the area is properly prepared, recutting any tiles that need it so everything goes back together properly. The tiles were generally in good condition; a few had become quite porous and were replaced.
More on roof repointing.
Repair, restoration or re-roof: what is the difference?
| Repair | Restoration | Re-roof | |
|---|---|---|---|
| When it fits | Sound roof with individual problem areas | Sound tiles, tired bedding, pointing, valleys or coating | Tiles porous or failing across the roof, or frame problems |
| What it involves | Replace broken tiles, fix valleys or flashings | Clean, repair, rebed and repoint, valleys, recoat where it suits | Strip and re-roof in new tiles |
| Market cost, Melbourne | About $315 to $1,050 per tile repair job | About $4,200 to $11,550 | About $105 to $230 per m² in concrete tiles |
| Read more | Roof repairs | Roof restoration | Roof replacement |
These are market ranges from published Australian price guides, not Royce Roofing prices. Every roof is different. We give you a fixed written quote after a free inspection.
Sources: What’s The Damage: Roofing costs in Melbourne (October 2026).
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When is a repair enough?
According to James, it comes down to the overall integrity of the roof. If the tiles are still in good condition, you may avoid a complete re-roof. If the bedding is looking tired, rebedding and repointing may be the right work. If the tiles themselves have become quite porous, that is when to start looking at a re-roof.
It just comes down to the right judgment on how old the roof is and what needs to be done.
Signs you may need a new roof
- Tiles cracking, crumbling or porous across the whole roof, not just in patches
- Sagging roof lines, which can point to batten or frame problems
- Leaks appearing in different places despite repairs
- A history of patch repairs that keep failing
Compare those with the signs that a restoration will do the job, and see how long a tiled roof lasts.
What happens if damage is left too long?
The main priority is to keep the roof watertight. Cracked and broken tiles can create leaks which can cause damage internally, your electricals and your plaster, and the bill can be astronomical if it’s left too long.
Water can also get into the insulation. Chunks of old mortar in the gutters or around the valleys are a sign the roof’s mortar is deteriorating.
What to ask before accepting a quote
Getting a couple of quotes is a good way to compare options, but James says to look beyond the price.
A good roofer wouldn’t hide anything that they’re doing. They can literally answer any question about what the quote entails. The cowboys come in and do a really low quality job for next to nothing but they won’t be able to tell you what they’re actually doing or what the warranties are.
- What does the quote include?
- What work is actually being carried out?
- Why is the work necessary?
- Why does the process cost what it does?
- What warranties are included?
See questions to ask your roofing contractor and our restoration cost guide.
Safety on every job
Before getting onto the roof, the first step is assessing hazards.
The first thing we do is assess any hazards. We go through, make sure there are no skylights or anything that could potentially create a hazard, set up the ladder tied off, make sure everything’s all good to get up, and then obviously set the harnesses up.
The compliant method is set by Victoria’s Occupational Health and Safety Regulations 2017: for work where someone could fall more than 2 metres, a passive fall prevention device such as guard rail must be used before falling back on a work positioning or fall arrest system (a harness), unless it is not reasonably practicable. That is why Royce’s standard is our own temporary safety rail on the roof edge, with harnesses as a back-up or where rail genuinely cannot be fitted, plus safety nets under old skylights. James had been with the company only a short time when we spoke.
Sources: Occupational Health and Safety Regulations 2017 (Vic), regulation 44; WorkSafe Victoria: Prevention of falls in housing construction.
I was not even two days in and I was given a full rundown of how we use the harnesses and how to use them safely. Most if not all the roofers have working at heights qualifications as well.
WorkSafe Victoria’s compliance code for housing construction puts edge protection such as guard railing ahead of harnesses and ladders when controlling the risk of falls from a roof. Our crews set up our own temporary safety rail, ladder guards and, where there are old skylights, safety nets before anyone works on the roof. Every crew member holds a working at heights qualification.
Common questions
Does an old roof always need replacing?
No. If the tiles and structure are sound, a repair or restoration can keep it going for years. On a 30-year-old Wheelers Hill roof, our tiler estimated another 10 to 15 years after rebedding and repointing.
How do I know if my roof needs replacing or restoring?
Restore when the tiles are sound but the bedding, pointing, valleys or coating are tired. Replace when tiles are porous or failing across the roof or the frame has problems.
Is restoration cheaper than replacement?
Usually. Published Melbourne figures put a tiled roof restoration at about $4,200 to $11,550, against about $105 to $230 per square metre to re-roof in concrete tiles.
What are the signs a roof needs replacing?
Tiles failing across the whole roof, sagging lines, leaks in new places despite repairs, and patch repairs that keep failing.
What does rebedding and repointing involve?
Removing the old mortar, cleaning and preparing the ridges, recutting tiles where needed, relaying the caps on new bedding and sealing them with flexible pointing.
What should I ask before accepting a roofing quote?
What it includes, what work is being done and why, why it costs what it does, and what warranties apply.
Related
Sources: What’s The Damage: Roofing costs in Melbourne (October 2026).
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