Remedial Waterproofing Systems in Sydney
Expert waterproofing installation, repair, and maintenance services for Sydney properties. As a Registered Class 2 Building Practitioner under the DBP Act 2020, we deliver reliable waterproofing solutions with 30+ years of experience.

Comprehensive Waterproofing Solutions
From waterproofing repair to full system installation and ongoing maintenance, we provide complete remedial waterproofing services for residential, strata, and commercial properties across Sydney.
Waterproofing Installation
Professional installation of waterproofing systems for new construction and renovation projects across Sydney.
Key Features
- Roof waterproofing systems
- Basement waterproofing
- Balcony and terrace waterproofing
Benefits
- NCC compliant installation
- Australian Standards certified
Waterproofing Repair
Expert repair of failed waterproofing systems to stop active leaks and prevent further water damage to your property.
Key Features
- Leak detection and repair
- Membrane repair and replacement
- Sealant replacement
Benefits
- Emergency repair services
- Same-day response available
Our Specialisations
We specialise in the full range of remedial waterproofing services, tailored to the specific conditions of each property and building type.
Roof Waterproofing
Comprehensive waterproofing solutions for flat and pitched roofs
- Membrane systems
- Liquid coatings
- Drainage solutions
- Insulation integration
Strata Waterproofing
Common property waterproofing for strata schemes, managed with minimal disruption to residents.
- Balcony and planter box waterproofing
- Podium and basement waterproofing
- Committee-ready scopes and reports
- Class 2 registered practitioner sign-off
Basement Waterproofing
Protection against groundwater and moisture infiltration for basement and below-grade structures.
- External membrane systems
- Internal drainage solutions
- Cavity drainage installation
- Tanking systems
Balcony Waterproofing
Remedial waterproofing for balconies and terraces exposed to Sydney's weather conditions.
- Slip-resistant finishes
- Drainage systems
- Edge detailing
- Maintenance access
Wet Area Waterproofing
Remedial waterproofing for bathrooms, showers, and wet areas to Australian Standards.
- Shower base re-waterproofing
- Wall waterproofing systems
- Floor waterproofing membranes
- Penetration sealing
Why Choose Quin Projects
With over 30 years of experience and registration as a Class 2 Building Practitioner, we deliver reliable, compliant waterproofing solutions across Sydney.
30+ Years Experience
Established 1994
Decades of specialised expertise in remedial building and property maintenance across Sydney.
Class 2 Building Practitioner
BUP0003576
Registered and licensed under the DBP Act 2020 for professional building services.
Full Compliance
NCC, Australian Standards, WHS
All our services are fully compliant with NCC, Australian Standards, and WHS regulations.
Multi-Disciplinary Team
Skilled Professionals
Our team works together to deliver comprehensive solutions for any building service need.

