Extend your roof, not your worries.
New metal roof extensions, additions and awnings matched to your existing Colorbond® profile and colour — installed watertight from day one for homes, strata and commercial buildings.
Why choose a metal roof extension?
Extending the life of existing metal roofs without premature, expensive replacement. Here is why Australian property owners and strata committees trust our method.
Most metal roofs can be fully revitalised for a fraction of the cost of total replacement, restoring structural resilience, Colorbond® aesthetics, and UV protection.
Matched Profile & Colour
We source corrugated, Klip-Lok or standing seam sheets in the exact Colorbond® colour to blend seamlessly with your existing roof.
Watertight From Day One
Proper flashing, valley gutters and lap joins mean no leaks at the junction between old and new roof — the most common failure point.
Built to NSW Conditions
Engineered for wind loads, thermal movement and coastal exposure so your extension performs as well as the original roof.
Minimal Disruption
Staged installation keeps your home or tenants dry and operational throughout the build, with tidy site practice.
Our Process
Our systematic 5-step methodology for metal roof extensions and additions.
Site Measure & Roof Match
We inspect your existing roof profile, pitch and colour, then measure up to plan the extension sheets, flashings and gutters.
Structural Check
We confirm the supporting frame, battens and fall are suitable for the new metal roof load and weatherproofing.
Sheet & Flashing Fabrication
Sheets are cut to length and flashings folded to match your roof profile and colour for a seamless join.
Installation & Sealing
New sheets, ridge caps and valley gutters are fixed with the correct screws and sealants, with careful flashing into the existing roof.
Gutter & Final Inspection
We connect or extend gutters and downpipes, then water-test the junctions so you know the extension is watertight.
What does a metal roof extension involve?
A metal roof extension adds new Colorbond® or Zincalume® sheeting to an existing roof — whether for a home addition, a carport, a patio awning, or a commercial building expansion.
The critical work is at the join. Matching the profile, pitch and colour is only half the job; the other half is flashing the new roof into the old one so water runs the right way and never finds a gap.
Hiroof handles the full scope — structural check, sheet supply, flashing, gutters and downpipes — so the extension looks original and stays dry.
What's Included
- Profile and Colorbond® colour matching
- Structural and pitch assessment
- Sheet supply and cutting to length
- Custom flashings and valley gutters
- Gutter and downpipe connection
- Junction water-testing and sign-off
Service Coverage
Sydney, Newcastle, Wollongong, Canberra
Frequently Asked Questions
Everything you need to know about our roof extensions service.
Get a quote for roof extensions
Leave your details below and our team will get in touch to assess your metal roof.