Roof replacement and roof restoration are not the same thing — and choosing the wrong one is one of the most expensive mistakes Australian homeowners make. Replacement costs $10,000–$30,000. Restoration costs $2,500–$8,000. But restoration on a roof that needs replacement is money wasted.
What's the difference?
Roof restoration involves cleaning, repairing broken or cracked tiles, repointing and rebedding the ridge capping, and applying a waterproof membrane or paint coating. It extends the life of an existing roof that is structurally sound but weathered.
Roof replacement involves removing all existing roofing material down to the sarking (or replacing the sarking too), and installing entirely new tiles, metal sheets, or corrugated iron. It's required when the structure is compromised, tiles are beyond repair, or you're changing material type.
How to tell which one you need
| Condition | Restoration | Replacement |
|---|---|---|
| Faded, moss-covered, but structurally intact tiles | ✓ Good candidate | |
| A few cracked or broken tiles, sound ridge capping | ✓ Repair + coat | |
| Roof over 25 years old, multiple cracked tiles | ✓ Replace | |
| Sagging roof deck or rotten battens | ✓ Replace | |
| Active leaks despite previous restoration | ✓ Replace | |
| Asbestos cement (fibrous) tiles or sheets | ✓ Replace (licensed removal) | |
| Terracotta tiles, sound but faded | ✓ Can restore |
Roof replacement cost by type and size
| Roof type | Cost per sqm | 150sqm house |
|---|---|---|
| Colorbond steel (corrugated) | $50–$90/sqm | $7,500–$13,500 |
| Colorbond steel (Trimdek) | $60–$100/sqm | $9,000–$15,000 |
| Concrete tiles | $45–$80/sqm | $6,750–$12,000 |
| Terracotta tiles | $65–$120/sqm | $9,750–$18,000 |
| Asphalt shingles (less common) | $35–$60/sqm | $5,250–$9,000 |
These costs include material and labour but not scaffolding ($1,500–$3,500 depending on roof height and pitch) or asbestos removal if required ($3,000–$8,000).
Roof restoration cost breakdown
| Item | Cost |
|---|---|
| Pressure cleaning | $300–$800 |
| Tile repairs (per tile) | $40–$120 per tile |
| Ridge capping repoint and rebed | $1,000–$3,000 |
| Membrane / paint coating | $800–$2,500 |
| Full restoration (package price) | $2,500–$8,000 |
Roof replacement cost by city
| City | Colorbond (150sqm) | Tiles (150sqm) |
|---|---|---|
| Sydney | $10,500–$16,500 | $9,000–$18,000 |
| Melbourne | $9,500–$15,000 | $8,000–$16,500 |
| Brisbane | $9,000–$14,000 | $7,500–$15,500 |
| Perth | $9,000–$14,500 | $7,750–$16,000 |
| Adelaide | $7,500–$12,500 | $7,000–$13,500 |
How much does a roof replacement cost in Australia?
A full roof replacement in Australia costs $10,000–$30,000 for a standard 3-bedroom home, depending on roof size, material, and pitch. Colorbond steel runs $7,500–$15,000 for a 150sqm roof. Terracotta tiles run $10,000–$18,000. Add $1,500–$3,500 for scaffolding and $3,000–$8,000 if asbestos removal is required.
How much does roof restoration cost?
Roof restoration costs $2,500–$8,000 for a standard house, depending on roof size, the number of tiles needing repair, and extent of ridge capping work. It makes sense when the roof structure is sound but the surface is weathered. It's not appropriate for roofs over 25 years old or those with structural damage.
How long does a roof last in Australia?
Concrete tiles last 30–50 years. Terracotta tiles can last 50+ years if maintained. Colorbond steel lasts 30–40 years. Asphalt shingles (less common in Australia) last 15–25 years. Restoration adds 5–10 years to a deteriorating roof surface; replacement resets the clock fully.
Does insurance cover roof replacement in Australia?
Home insurance typically covers sudden damage (storm, hail, falling tree) but not gradual deterioration. Age-related wear is almost never covered. Get an independent inspection report before lodging a storm damage claim — insurers require evidence the damage was event-caused rather than pre-existing.
How do I know if I need a roof replacement or restoration in Australia?
If more than 30% of tiles are cracked, broken, or missing, or if the roof structure has damage, replacement is usually the better investment. If the roof is structurally sound with surface wear only, restoration (clean, re-point, re-coat) can add 10–15 years of life at a fraction of the replacement cost.
How long does a roof replacement take in Australia?
A standard residential roof replacement in Australia takes 2–5 days depending on roof size and pitch. Colorbond re-roofing is faster than tile because sheets are larger. Bad weather can cause delays — always build buffer time into your project plan.