Tile-to-Metal Roof Conversions: Cost, Process & What to Expect
Say goodbye to cracked tiles, failing mortar, and recurring leaks. Learn how converting from concrete tiles to Colorbond steel transforms your property.
Many older Sydney homes built between the 1960s and 2000s are covered with concrete or terracotta tiles. Over decades of weathering, tiles become porous, brittle, and prone to cracking, while the sand-and-cement ridge mortar disintegrates. A tile-to-Colorbond roof conversion is one of the most effective structural and aesthetic investments you can make in your home.
1. The Immense Structural Weight Benefit
Concrete tiles are exceptionally heavy, weighing approximately 55kg to 65kg per square metre. For a standard 200m² Sydney home, that means your timber roof trusses are supporting over 12 tonnes of dead weight. When tiles absorb water during prolonged rain, that weight increases further.
In contrast, high-tensile Colorbond steel sheeting weighs only 4.5kg to 5kg per square metre — reducing roof load by roughly 90%. This alleviates stress on aging timber rafters, prevents internal ceiling sagging, and enhances structural stability.
2. Step-by-Step Roof Conversion Process
A professional tile-to-steel conversion requires meticulous planning and weatherproof staging to ensure your home remains 100% dry throughout the job:
- Site Setup & Edge Protection: Installing compliant guardrails, scaffold, and safety mesh to satisfy strict SafeWork NSW standards.
- Systematic Tile Stripping: Removing existing tiles in manageable sections and transporting them to dedicated recycling facilities.
- Truss & Batten Inspection: Thoroughly inspecting timber rafters for sag, rot, or termite damage, and realigning levels where necessary.
- Insulation Blanket (Anticon): Laying 60mm foil-faced thermal insulation blanket directly over rafters to stop condensation and thermal bridging.
- Steel Batten Installation: Fixing high-tensile Topspan steel roof battens to provide a rigid, perfectly straight base for the new sheets.
- Colorbond Sheeting & Custom Flashings: Securing custom cut-to-length sheets, scribed ridge caps, barge cappings, and valley trays.
3. 100% Weatherproof & Hail-Resistant
During severe Sydney hailstorms, concrete tiles frequently shatter, allowing torrential water into insulation and ceilings. Colorbond steel does not crack or shatter on hail impact, safeguarding your possessions and structural framing.