As a homeowner, replacing your roof is one of the biggest investments you'll make.

Beyond simply upgrading appearance, a new roof safeguards comfort, efficiency, and long-term value. Understanding what drives overall cost, and which materials offer the best return, helps you plan with confidence. 

What Drives the Cost of Roof Replacement?

Roof replacement costs can vary widely depending on your home’s size, design, and location. 

Several key factors influence your total cost: 

• Roof size: Contractors calculate most projects per square metre, so larger homes result in higher costs.
• Roof pitch and design: Low-pitched roofs usually involve simpler work, whereas steep or complex shapes increase labour.
• Material choice: Metal, tile and slate each carry very different price points and installation requirements.
• Access and location: Difficult site access, regional labour variations, and scaffolding needs all add to cost.
• Additional work: Structural repairs, insulation, or disposal of the old roof can significantly increase the total.

Other Cost Considerations 

In addition to the roofing material, several project elements will factor into the total cost:

• Labour cost: Installation labour often accounts for 40–50% of the overall bill. Rates vary by region and roof complexity.
• Removal and disposal: Stripping and removing an old roof can add several thousand dollars.
• Structural work: Replacing battens, insulation, or sarking can increase costs but ensures long-term performance.
• Roof design challenges: Multi-level homes, steep slopes, and complex shapes demand more labour and time.

Roof Repair or Full Replacement? 

Not every roofing issue requires full replacement. Small leaks, damaged flashing, or broken tiles may be resolved through targeted roof repairs. However, widespread rust, sagging structures, or extensive damage usually make full replacement the most cost-effective choice. 

What To Consider When Choosing Roofing Material 

Selecting the right roofing material involves balancing cost, durability, and design goals. For most Australian homes, the decision often comes down to steel, tile, or slate. 

• Steel roofing: Lightweight, strong, fire-resistant, and available in a broad range of profiles and colours. Suitable for both traditional and modern homes.
• Tile roofing: Familiar and attractive, but heavier, requiring stronger framing and more frequent upkeep.
• Slate roofing: Prestigious, but expensive in both material and installation cost. 

What Does a COLORBOND® Steel Roof Replacement Cost? 

Roof replacement costs in Australia vary depending on factors such as roof size, design complexity, site access and the materials selected. While COLORBOND® steel may carry a higher initial cost than some entry-level roofing options, its durability, low maintenance requirements and long-term energy efficiency make it a strong investment over time.

Developed and tested by BlueScope for Australian conditions, COLORBOND® steel is engineered to endure intense UV exposure, high winds, and heavy rainfall while maintaining its appearance for decades, reducing the need for frequent repair.

Why COLORBOND® Steel Is a Smart Long-Term Choice 

COLORBOND® steel incorporates advanced protective technologies developed by BlueScope: 

• Activate® technology improves corrosion resistance.
• Thermatech® solar reflectance technology helps reflect heat, supporting better energy efficiency. 

The material’s high strength-to-weight ratio makes it suitable for a wide range of Australian environments, from coastal regions to rural properties. Unlike materials that can fade, crack or warp, COLORBOND® steel maintains its finish with minimal maintenance. 

Every LYSAGHT® roof is shaped from genuine COLORBOND® steel and backed by BlueScope warranties, ensuring confidence that your investment is built on proven performance.

Design Versatility for Every Home

A roof replacement also provides the opportunity to refresh your home’s overall design. COLORBOND® steel’s colour palette, from soft neutrals to bold architectural tones, allows coordination with walling, guttering and fascia for a cohesive exterior. 

Whether your home features a timeless gable or a modern skillion, Lysaght offers profiles that combine visual impact with engineering strength. 

• LYSAGHT CUSTOM ORB®: The iconic corrugated profile that suits both heritage and contemporary designs.
• LYSAGHT ENSEAM®: A refined standing seam-style profile offering clean vertical lines.
• LYSAGHT SNAPSEAM™: A bold architectural profile that delivers modern, high-end appeal. 

Make the Right Roofing Choice for Your Home 

A well-planned roof replacement enhances your home’s comfort, efficiency, and longevity. Choosing a LYSAGHT® roof shaped from COLORBOND® steel means relying on materials proven to perform in Australia’s conditions, supported by local expertise that has guided Australian homes for generations.