Project Overview
Waterproofing Integrity was engaged to investigate ongoing waterproofing failures and drainage issues affecting an existing residential development at in a southern Sydney beachside suburb.
The project brief involved identifying the source of internal water leaks and developing a practical remediation strategy within an occupied environment and existing building constraints.
Key Issues Identified
- Leaking door step thresholds and window subsills
- Internal water ingress leaks into occupied areas
- Non-compliant surface level falls causing water ponding
- Non-continuous waterproofing detailing across interfaces
- Drainage performance limitations within existing construction
- Blockwork deterioration, visible damage, and voids affecting waterproofing continuity
- Waterproofing breakdown across wall and floor junctions
Waterproofing Integrity Scope
Waterproofing Integrity worked directly with project stakeholders of the Strata Manager and appointed Project Manager to investigate the waterproofing failures and assess existing site conditions.
Services Included
- Site inspections and waterproofing assessment
- Water containment testing
- Water shedding testing
- Surface fall and drainage assessment
- Situation and diagnostic reporting
- Identification of waterproofing system breakdown
- Assessment of drainage performance limitations
- Investigation of damaged blockwork masonry elements and substrate void and hole conditions
- Waterproofing detailing review and remediation strategy development
Solution Delivered
A performance-based waterproofing remediation strategy was developed to address the identified defects while minimising major reconstruction works.
The solution included:
- Development of new waterproofing detailing to integrate existing and new membrane systems
- Improvement of water shedding performance to drainage locations
- Remediation detailing tailored to existing site constraints
- Coordination of waterproofing interfaces across damaged wall and floor junctions
- Assessment and rectification strategy recommendations associated with damaged blockwork and substrate voids
- Facilitation of Declared Design for waterproofing design under Design and Building Practitioners Act (NSW) 2021 requirements
- Waterproofing continuity improvements across critical junctions and interfaces to support long-term membrane performance
Project Outcome
✔ Eliminated ongoing water ingress risk
✔ Achieved practical remediation outcomes within existing building constraints
✔ Improved drainage and waterproofing continuity
✔ Addressed substrate and blockwork conditions contributing to waterproofing deterioration and breakdown
✔ Maintained constructability without major demolition works
✔ Coordinated compliant waterproofing remediation solution
✔ Supported long-term waterproofing performance and project delivery
✔ Developed a remediation strategy aimed at reducing recurring waterproofing failures and unnecessary future rectification works
✔ Integrated waterproofing detailing intended to minimise future membrane performance issues caused by inconsistent interfaces, damaged substrates, and drainage limitations