Remedial works at a multi-unit Class 2 complex in Hunters Hill have replaced combustible cladding, met National Construction Code (NCC) fire-safety clauses and allowed everyday building maintenance to continue without interruption. MJ Engineering Projects handled the performance specification, supervised panel removal and installation, and compiled the documentation needed for a smooth Construction Certificate. Residents stayed in place and the owners corporation now enjoys a façade that is both non-combustible and weather-tight.
Project Background
Material sampling proved the original aluminium-composite panels failed AS 1530 combustibility limits, exposing owners to rising insurance premiums and possible council enforcement. Removing the panels risked letting rain reach the timber and steel frame behind the wall system. MJ Engineering Projects’ remedial design practitioners drafted a performance specification naming CodeMark-certified, non-combustible panels plus cavity-drainage and vapour-control details. Council and the certifier endorsed the document without delay, so scaffold bookings and waste permits went ahead on schedule.
Scope of Remedial Works
Replacement of external wall systems for the Class 2 development
Preparation of a detailed performance specification
Comprehensive supervision of cladding removal and replacement
Verification of quality and compliance with all NCC requirements
Key Challenges and Solutions
Fire-Rating Compliance and Weatherproof Performance
The façade needed to resist flame spread without creating new leak paths. Old panels came down by mid-morning, installers fixed a temporary vapour-permeable wrap before clock-off and verified water tightness the next day.
Live-Occupation Safety
Balconies behind the work zone stayed in daily use. Safety decks with mesh screens were used to intercept any falling screws or cladding fragments, and excessive noise was limited.
Quality Assurance Within Tight Deadlines
The project was subject to a fire order, so all works needed to be completed in accordance with relevant standards to enable its removal.
Conclusion
This Hunters Hill façade renewal demonstrates how disciplined remedial works can replace non-compliant cladding, maintain continuous weather protection and satisfy NCC documentation without disrupting residents or daily building maintenance. The new wall system is now fire-rated and watertight.
MJ Engineering Projects brings more than fifteen years of remedial works and building-maintenance expertise to façade replacement, waterproofing and structural upgrades across Sydney.
Explore further case studies on our blog or contact the remedial works team for tailored guidance on Class 2 refurbishments.
