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Remedial Waterproofing & Concrete Repair Services

We bring our substantial civil works experience to your home, commercial buildings, industrial sites, civil infrastructure, government and educational facilities.

Specialist Remedial Solutions in QLD and NSW

Waterstop Solutions NSW has successfully obtained the new NSW Registered Design and Building Practitioners Licence, which allows us to work on strata buildings, including those classified under class 2 according to the new regulations in New South Wales. This accomplishment further cements our position as your go-to partner for high-quality remedial building and waterproofing repairs. 

We have a NSW open builder’s licence, but here are some examples of building classes we can help you with:

🏢 Class 2 (Residential Apartments)

🏥 Class 7 (Warehouses, Basements, and Storage)

🏠 Class 3 (Accommodation for Guests)

🏛️ Class 9c (Aged Care Facilities) 

Book a Remedial Consultation with our Diagnostic Experts today.

We are one of the leading companies in our area of expertise

Your trusted remedial service provider since 2009, servicing government facilities, educational institutions, commercial buildings, residential buildings and civil infrastructure (water & tunnels) in QLD and NSW.


  • Concrete Leak Sealing Injections
  • Concrete Crack Injections
  • Remedial Seepage & Water Ingress Solutions
  • Concrete Repairs (spalling, concrete cancer)
  • Remedial Waterproofing Solutions
  • Slabjacking
  • Ground Improvement
  • Joint Refurbishment & Joint Sealing
  • Protective Coatings


Waterstop Solutions is pleased to inform you that we are a part of the QBCC panel of providers.
For the provision of Consultancy Services for Waterproofing Investigative Services, and also as a contractor.


We fix leaking buildings and concrete structures in QLD and NSW

Delivering our tailored remedial building repair solutions to the residential, commercial, industrial and civil built environment.

When choosing Waterstop Solutions®, you will benefit from major civil works experience and Waterstop Solutions’ unique process systems of remedial techniques (patent pending)  –  developed by our Directors Chris Anderson and Harold Du Toit. By using the latest proven technology for remedial applications in the built environment, we ensure that we are providing a high success rate in a cost-effective way to our clients. Quality – delivered with integrity and care is peace of mind for all parties.

Types of concrete structures we often leak seal and repair

Basements, balconies, car parks, concrete rooftops (except tiled roofs and metal roofs), concrete slabs, concrete swimming pools, concrete pipe joints, hardstands, joints (cold joints, contiguous pile walls, industrial floor joints, infill slabs, floor-wall, wall-ceiling), lift pits, lift shafts, manholes, pipe and service penetrations, planter boxes, retaining walls, water infrastructure (conduits, reservoirs, dams, wastewater treatment plants, water treatment plants, water retaining tanks).


 We recommend seeking assistance from other reputable trades regarding:

  • Lightweight constructions
  • Window sills
  • Showers and bathrooms  – We recommend contacting a waterproofer that specialises in bathroom waterproofing or a specialist builder.


If your building is 7 years or younger, our recommendation is to seek assistance from QBCC and contact the builder.



 We bring our substantial civil works experience to your home, commercial buildings, industrial sites, civil infrastructure, government and educational facilities. 

Established by Harold Du Toit in 2009 to service the construction of Clem 7 tunnel in Brisbane, the team at Waterstop Solutions has since completed over 10,000 projects across Queensland and New South Wales – Notably:

Parliament House, Legacy Way Tunnel, Yungaba House, The Gabba,

Jewel Residences, Gotham Tower, Airport Link Tunnel, Alex Perry Hotel and Apartments, 

Cathedral of St Stephen, QLD Children’s Hospital, Australian Federal Police HQ,

Taronga Zoo, Steyne Hotel, M5 Tunnel,

“The Toaster” (Bennelong Apartments) and Sydney Harbour Bridge.

With a solid reputation of integrity built upon years of reliable service in the building and construction industry, at Waterstop Solutions we pride ourselves on using industry-leading technologies to deliver superior remedial waterproofing, leak sealing, concrete crack injections, joint sealing and concrete repair solutions to Brisbane, Gold Coast, Sunshine Coast in South-East QLD and areas in and around Sydney NSW.

Remedial Reflections - HIGHLIGHTS

If you have any questions regarding water ingress/seepage and/or concrete deterioration/concrete cancer, we would love to hear from you. We have offices located in Brisbane and Sydney, with our services offered throughout QLD and NSW.


Waterstop Solutions’ quality system, policy and procedures are compliant across Australia to AS/NZS ISO 9001, ISO 4801, ISO 14001.

Cm3 Prequalified

Waterstop Solutions is Cm3 prequalified for our OHS/WHS capabilities and practices.

Waterstop Solutions is Cm3 prequalified for our OHS/WHS capabilities and practices.

  • Waterstop Solutions on QBCC Panel of Providers
  • QBCC Licence Classes: Concreting and waterproofing. Licence number: 1162603
  • NSW Builders Licence number: 347295C
  • NSW Registered Design and Building Practitioners Licence
  • Certificate III in waterproofing
  • Working in confined space certified
  • Elevated Work Platform (EWP) and High-Risk Work (HRW) qualified


Philip CrespinPhilip Crespin
02:38 18 Jan 23
Sam and Elijah from Waterstop Solutions have attended our site and I couldn’t have asked for anyone better. They have both been extremely professional, diligent and helpful. They’ve given me regular updates and indulged all my questions in a really decent manner. Would recommend.
Martha JenningsMartha Jennings
23:27 07 Nov 22
First class! We had some issues with spalling concrete in the suspended slab in our garage and water seepage through the wall in the back. The inspector walked us through the assessment explaining what was causing these issues and how to rectify them. The quote detailing of each step of the process to complete the work and their ability to clearly walk you through each stage of the concrete repair and leak sealing process made Waterstop Solutions stand out from other quotes. The technicians were very skilled and friendly. Outstanding workmanship. Definitely highly recommend Waterstop Solutions for their expertise and professional service.
Matt CornellMatt Cornell
02:20 28 Oct 22
Very happy to refer our clients iwth water entry issues to the team at Waterstop Solutions. It's a tricky thing keeping water out of buildings and the team at Waterstop Solutions know their business very well.
Chris AndersonChris Anderson
01:11 16 Aug 22
Waterstop Solutions are leaders and pioneers in their fields of expertise. The senior management were also was involved developing the first nationally accredited training course for remedial work to the built environment.
Vicki PainVicki Pain
06:04 23 Nov 21
Leaders in their field without a double! I have worked with Chris on and off over the past 15 or so years, As a long term business owner it is easy to see that experience speaks for itself. Waterstop Solutions have provided expert advice on a variety of situations, they really are leaders in their field. Experienced and knowledgeable in order to recommend solutions and problem solve whenever you have unwanted water. Just down to earth and honest.
Pedro Jose BallesteroPedro Jose Ballestero
05:54 09 Dec 22
Waterstop team solved a complex moisture problem in our storeroom. The humidity has been reduced inmensely.The final result has been what it was promised.Great result ,talking about water,humidity and retaining walls difficulties to work with.
Beth NymanBeth Nyman
06:32 02 Dec 22
Adrian and his team were helpful and responsive and went out of their way to fix my problem. Adrian also helped with his expertise in ensuring my insurance company came to the party to fix the water damage.
Shay Vaughn-HudsonShay Vaughn-Hudson
03:38 10 Jun 21
Thank you to Adrian & the Waterstop Solutions team for their recently completed concrete injection works at a residential apartment complex in Pymble.From the initial quoting process, all the way through to post job completion follow up - I found Adrian to be eminently professional, thorough and communicative. The proposed scope of works and timeframe all aligned with an excellent final result from the team. Highly recommend Waterstop Solutions for any remedial waterproofing and concrete repairs.
Marcus GeogheganMarcus Geoghegan
04:00 31 May 21
Adrian and his team are extremely professional, conduct there work in a timely manner and always finish there work to the highest standard, at a cost effective price. Adrian and WWS have conducted many jobs for me and will continue to do so, highly recommended.
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