Roof replacement costs depend primarily on your chosen roofing material and the size of your roof. Budget-friendly Colorbond steel roofing starts around $18 per square metre, while premium materials like slate tiles can reach $500 per square metre or more. Installation labour typically adds $40 to $120 per hour on top of material costs.
Need an estimate for your specific project? Use our roofing cost calculator above to get a ballpark figure. Simply input your total roof area (we’ll show you how to calculate this below), then select your preferred roofing material for an instant estimate.
Please note: This calculator provides indicative material costs only. It does not include labour, removal and disposal of existing roofing, structural repairs, or additional expenses like flashing, ridge capping, or scaffolding.
Having a roof over your head is essential, but understanding roof replacement costs doesn’t have to be complicated. Use our roofing calculator above for a quick estimate, or continue reading to learn what influences roof replacement costs and get a clearer picture of what you’ll pay for your new roof.
Step 1: Understand the Factors That Impact Roof Replacement Cost
Roof replacement costs are influenced by several key variables:
Step 2: Calculate the Total Square Metres for Your Roof
To determine your roof size:
Safety Warning:
Only trained roofing professionals with proper safety equipment should work at height. Safer alternatives include using your home’s floor plan to estimate roof size, measuring from inside your home, or—the best option—contacting a professional roofing service that offers complimentary measurements during the quoting process.
Did you know? Quality roofing protects your home from weather damage while significantly improving energy efficiency and property value.
Step 3: Estimate the Cost of Materials
Once you know your roof area, multiply the total square metres by the cost per square metre of your chosen roofing material to estimate material costs.
Average Roofing Material Costs Per Square Metre (Australia)
Roofing material prices vary widely, from economical Colorbond options to premium slate tiles. The following costs are indicative averages:
How to Calculate Material Costs
While consulting an experienced roofing contractor provides the most accurate estimate, you can calculate a rough figure using this method:
Alternatively, use our calculator above for an instant estimate.
Remember: Professional roofing installation requires experienced tradespeople working safely at height with appropriate safety equipment and insurance.
Step 4: Include Additional Expenses
Material costs are just one component of your total roof replacement budget. Also factor in:
Step 5: Get Multiple Quotes
To ensure competitive pricing and quality workmanship, obtain quotes from at least three reputable roofing contractors. Compare quotes carefully, evaluating:
This comprehensive comparison helps you make an informed decision that balances cost with quality and reliability.
Deciding between roof replacement and repairs depends on the extent of damage and your roof’s overall condition. Repairs typically make sense for isolated issues—a minor leak, several damaged tiles, or localized wear in one area. However, full replacement becomes the more practical option when your roof has sustained widespread damage, is approaching the end of its expected lifespan (typically 20-50 years depending on material), or requires frequent repairs that add up over time.
Consider replacement if you’re experiencing multiple issues simultaneously, if your roof is over 20 years old, or if repair costs are approaching 30-50% of replacement cost. While replacement requires a larger upfront investment, it often proves more cost-effective long-term than repeatedly patching an aging roof.
How do you calculate the cost of a roof?
To estimate your roof cost, multiply your total roof area (in square metres) by the average cost per square metre of your chosen roofing material. Remember to add labour costs (typically $40–$120 per hour) plus additional expenses like old roof removal, flashing, ridge capping, and any structural repairs needed.
How much does a roof cost per square metre in Australia?
Roofing costs per square metre in Australia vary significantly based on material choice, location, roof complexity, and pitch. Expect to pay between $80 and $250 per square metre for a complete installation, including both materials and labour. Budget-friendly Colorbond steel sits at the lower end, while premium materials like slate or terracotta reach the higher end of this range.
How much does a roof cost in Australia?
Total roof replacement costs in Australia depend on multiple factors including roof size, chosen material, labour rates, site access, and additional components like guttering or skylights. For a typical residential property, expect to invest between $10,000 and $30,000, though larger homes or premium materials can exceed this range significantly.
How do you calculate the square metres of a roof?
To calculate your roof area: measure the length and width of each roof section, multiply these dimensions to find each section’s area, then add all sections together for your total square meterage. For complex roof shapes, break them into smaller rectangular sections for easier calculation. Alternatively, consult a roofing professional who can provide accurate measurements during the quoting process.
When is it necessary to replace a roof?
Roof replacement becomes necessary when repairs can no longer effectively address underlying problems. Common indicators include: severe storm or hail damage affecting multiple areas, a roof approaching or exceeding its expected lifespan (20–50 years depending on material), recurring leaks despite repeated repairs, widespread tile damage or deterioration, sagging or structural issues, or when repair costs approach 30–50% of replacement cost. If you’re experiencing multiple issues simultaneously, replacement is typically the more cost-effective long-term solution.
Roof replacement costs depend primarily on your chosen roofing material and the size of your roof. Budget-friendly Colorbond steel roofing starts around $18 per square metre, while premium materials like slate tiles can reach $500 per square metre or more. Installation labour typically adds $40 to $120 per hour on top of material costs.
Need an estimate for your specific project? Use our roofing cost calculator above to get a ballpark figure. Simply input your total roof area (we’ll show you how to calculate this below), then select your preferred roofing material for an instant estimate.
Please note: This calculator provides indicative material costs only. It does not include labour, removal and disposal of existing roofing, structural repairs, or additional expenses like flashing, ridge capping, or scaffolding.
Having a roof over your head is essential, but understanding roof replacement costs doesn’t have to be complicated. Use our roofing calculator above for a quick estimate, or continue reading to learn what influences roof replacement costs and get a clearer picture of what you’ll pay for your new roof.
Step 1: Understand the Factors That Impact Roof Replacement Cost
Roof replacement costs are influenced by several key variables:
Step 2: Calculate the Total Square Metres for Your Roof
To determine your roof size:
Safety Warning:
Only trained roofing professionals with proper safety equipment should work at height. Safer alternatives include using your home’s floor plan to estimate roof size, measuring from inside your home, or—the best option—contacting a professional roofing service that offers complimentary measurements during the quoting process.
Did you know? Quality roofing protects your home from weather damage while significantly improving energy efficiency and property value.
Step 3: Estimate the Cost of Materials
Once you know your roof area, multiply the total square metres by the cost per square metre of your chosen roofing material to estimate material costs.
Average Roofing Material Costs Per Square Metre (Australia)
Roofing material prices vary widely, from economical Colorbond options to premium slate tiles. The following costs are indicative averages:
How to Calculate Material Costs
While consulting an experienced roofing contractor provides the most accurate estimate, you can calculate a rough figure using this method:
Alternatively, use our calculator above for an instant estimate.
Remember: Professional roofing installation requires experienced tradespeople working safely at height with appropriate safety equipment and insurance.
Step 4: Include Additional Expenses
Material costs are just one component of your total roof replacement budget. Also factor in:
Step 5: Get Multiple Quotes
To ensure competitive pricing and quality workmanship, obtain quotes from at least three reputable roofing contractors. Compare quotes carefully, evaluating:
This comprehensive comparison helps you make an informed decision that balances cost with quality and reliability.
Deciding between roof replacement and repairs depends on the extent of damage and your roof’s overall condition. Repairs typically make sense for isolated issues—a minor leak, several damaged tiles, or localized wear in one area. However, full replacement becomes the more practical option when your roof has sustained widespread damage, is approaching the end of its expected lifespan (typically 20-50 years depending on material), or requires frequent repairs that add up over time.
Consider replacement if you’re experiencing multiple issues simultaneously, if your roof is over 20 years old, or if repair costs are approaching 30-50% of replacement cost. While replacement requires a larger upfront investment, it often proves more cost-effective long-term than repeatedly patching an aging roof.
How do you calculate the cost of a roof?
To estimate your roof cost, multiply your total roof area (in square metres) by the average cost per square metre of your chosen roofing material. Remember to add labour costs (typically $40–$120 per hour) plus additional expenses like old roof removal, flashing, ridge capping, and any structural repairs needed.
How much does a roof cost per square metre in Australia?
Roofing costs per square metre in Australia vary significantly based on material choice, location, roof complexity, and pitch. Expect to pay between $80 and $250 per square metre for a complete installation, including both materials and labour. Budget-friendly Colorbond steel sits at the lower end, while premium materials like slate or terracotta reach the higher end of this range.
How much does a roof cost in Australia?
Total roof replacement costs in Australia depend on multiple factors including roof size, chosen material, labour rates, site access, and additional components like guttering or skylights. For a typical residential property, expect to invest between $10,000 and $30,000, though larger homes or premium materials can exceed this range significantly.
How do you calculate the square metres of a roof?
To calculate your roof area: measure the length and width of each roof section, multiply these dimensions to find each section’s area, then add all sections together for your total square meterage. For complex roof shapes, break them into smaller rectangular sections for easier calculation. Alternatively, consult a roofing professional who can provide accurate measurements during the quoting process.
When is it necessary to replace a roof?
Roof replacement becomes necessary when repairs can no longer effectively address underlying problems. Common indicators include: severe storm or hail damage affecting multiple areas, a roof approaching or exceeding its expected lifespan (20–50 years depending on material), recurring leaks despite repeated repairs, widespread tile damage or deterioration, sagging or structural issues, or when repair costs approach 30–50% of replacement cost. If you’re experiencing multiple issues simultaneously, replacement is typically the more cost-effective long-term solution.
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