Many homeowners wonder how much does a roof coating cost, the answer depends on roof size, material, condition, and access. In Australia in 2026, most roof coating projects fall between $35 and $80 per square metre, including cleaning, minor repairs, and application.
For an average single-storey home (150–200m² roof area), total costs usually range from $4,500 to $12,000. Larger or steeper roofs sit at the higher end.
Below is a clear breakdown of pricing and what drives it.
Average Roof Coating Cost per m² (2026)
These figures typically include:
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High-pressure cleaning
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Minor repairs and sealing
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Primer (if required)
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Two top coats
Prices vary depending on roof complexity and condition.
What Affects Roof Coating Costs
1. Roof Size
Roof coating is priced per square metre. Larger roofs increase total cost but often reduce the per-metre rate slightly.
Keep in mind that the roof area is not the same as the floor area. A 180m² house footprint may have a 200m²+ roof once pitch and overhangs are included.
2. Roof Condition
Preparation work strongly influences pricing.
If the roof has:
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Rusted sheets
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Broken tiles
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Loose ridge caps
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Heavy moss growth
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Previous failing coatings
Extra repairs will add to the quote. Rust treatment and tile repointing are common additional costs.
Severely damaged roofs may require restoration before coating.
3. Roof Material
Metal roofs generally cost less to coat than tiled roofs because they require fewer steps. Tile roofs often need repointing, sealing, and more detailed work.
Flat commercial roofs may require specialised membrane systems rather than standard acrylic coatings.
4. Roof Pitch and Access
Steep roofs increase labour time and safety requirements. Two-storey homes or limited access properties may require scaffolding or additional safety systems, which raises costs.
Simple, single-storey homes with good access cost less.
Is Roof Coating Worth It?
Roof coating extends the lifespan of an existing roof by sealing and protecting the surface. It can:
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Improve water resistance
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Reduce heat absorption (with reflective coatings)
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Refresh the roof’s appearance
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Help delay full roof replacement
A well-applied coating system can last 8 to 15 years, depending on product quality and environmental exposure.
Roof coating is generally more affordable than full roof replacement, which often starts above $15,000 for standard homes.
DIY vs Professional Roof Coating
DIY roof coating materials cost around $1,000–$3,000 depending on roof size. However, professional jobs include:
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Industrial cleaning equipment
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Safety systems
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Proper primers
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Even application thickness
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Warranty coverage
Working at height carries risk. Most homeowners choose licensed contractors for safety and long-term durability.
How to Get an Accurate Roof Coating Quote
When comparing quotes, check:
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Number of coats included
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Brand and type of coating system
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Whether primer is included
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Extent of repairs covered
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Warranty terms
Low quotes may exclude repairs or preparation work.
Ask whether ridge capping repointing and rust treatment are included or charged separately.
Final Cost Summary
So, how much does a roof coating cost in Australia in 2026?
Most homeowners can expect to pay $35 to $80 per square metre, with total project costs usually landing between $4,500 and $12,000 depending on size and condition.
The final price depends more on preparation and access than the coating product itself. Clear quotes that outline preparation steps and materials will give the most accurate comparison.
Get a Clear Roof Coating Price
Every roof is different. The only way to know the true cost is to assess its size, condition, pitch, and access.
At Properties Unlimited Group, we provide straightforward roof inspections and detailed quotes so you know exactly what’s included — cleaning, repairs, primers, coatings, and warranty coverage.
If you’re planning a roof coating and want clear pricing without guesswork, contact our team today.
We’ll review your roof, outline the required work, and provide a written quote based on your property — not a generic estimate.