Remedial works at Milsons Point have stopped persistent water ingress, repaired concrete damage and delivered a modern balcony enclosure that satisfies the Design and Practitioners Act. MJ Engineering Projects managed diagnostics, waterproofing application and structural repairs, providing a long-term solution that met the owners corporation’s budget and quality targets while everyday building maintenance activities continued.
Project Background
Ceiling stains and render cracks first alerted residents to a leak path running from rooftop planter boxes and balconies into the penthouse below. An MJ Engineering Projects inspection team undertook moisture mapping, cover-meter scans and core sampling which revealed failed membranes, delaminated render and spalling concrete at slab edges. Accredited remedial design practitioners then prepared an NCC-aligned specification that the insurer accepted without amendment.
Scope of Remedial Works
- Waterproofing of planter boxes
- Waterproofing of balconies
- Replacement of balcony doors
- Installation of new capping
- Repairing concrete spalling
- Repairing delaminated render
- Application of wall cavity flashing
- Application of medium build acrylic coatings
- Application of joint sealant
- Application of low sheen acrylic coatings
- Application of joint sealant
- Replacement of light fittings
Key Challenges and Solutions
Glass balcony-enclosure compliance
The client wanted a new glass enclosure that meets the Design and Practitioners Act and remains structurally isolated from the slab. Laminated glass panels and concealed brackets achieve NCC barrier loads.
Budget-controlled design
Cost certainty was essential for the owners corporation. Value-engineering workshops compared aluminium, steel and stainless options. The final design uses standardised stainless posts at set spacings and modular glass panels, cutting fabrication time and material wastage. Progress claims matched milestone inspections, allowing strata to draw down funds only after work was certified complete.
Waterproof platform around pillars
Pillars penetrated the planter box, creating a complex leak path. After removing soil, waterproofers installed custom corners and welded membrane skirts around each pillar. A flood test held water for 24 hours with no drops in level, confirming compliance with AS 4654.2 guidance referenced by Standards Australia. A drainage mat and root-resistant membrane protect the waterproofing from future damage.
Conclusion
This Milsons Point remedial works programme stopped water ingress, reinstated structural cover and provided a code-compliant balcony enclosure without disrupting residents or daily building maintenance. Planter boxes and balconies are fully waterproofed, concrete repaired, new flashings protect cavity interfaces and a polished glass balustrade modernises the façade.
MJ Engineering Projects draws on more than fifteen years of remedial works and building-maintenance expertise to safeguard Sydney properties against leaks, concrete decay and compliance risks. Explore further case studies on our blog or contact the remedial works team for tailored advice on planter-box waterproofing, balcony upgrades and façade renewal.
