The 5 most dependable waterproofing businesses in Sydney
When you’re building yourself a home or setting up an office space, there are going to be a lot of things on your checklist. In between the construction and insurance and all the other concerns, don’t forget to give some attention to waterproofing.
This is crucial for protecting your home or commercial area when bad weather inevitably hits. Good waterproofing will guard against leaks that can damage your structure or belongings, mitigate mould growth, and make your building last longer overall.
Our list of recommended waterproofing businesses in Sydney will get you started on protecting your property investment.
How much does waterproofing cost in Sydney?
Waterproofing in Sydney will usually cost between $40 and $100 per square metre. The complexity of the area and the type of method or technique used, such as torching, will affect the final price. Most companies will work with you to come up with a custom quote.
1. Waterproofing Sydney

Phone: 1800 49 00 49
Business hours:
- Monday – Friday: 7:00 am – 5:00 pm
- Saturday: 7:30 am – 4:00 pm
- Sunday: Closed
Waterproofing Sydney is a provider of waterproofing for residences and commercial properties all over the Sydney CBD and surrounding suburbs. The company has been around for over 15 years, and all technicians hold Level 3 waterproofing and general construction certificates.
The business does waterproofing for interior areas like bathroom surfaces, laundry areas, kitchens, and basements. They also work on exterior spaces like balconies, roofs, retaining walls, and swimming pool walls and flooring.
Finally, they also do caulking and sealing where necessary, such as for tanks and epoxy coatings.
You can call on Waterproofing Sydney’s expertise whether you’re planning to build and waterproof a new house or add some protection to your existing property.
You can contact the team anytime to talk about what kind of waterproofing work your property needs, and they’ll get back to you with a free quote. It would have been nice to see some listed pricing on the business website, however.
Would highly recommend
“It’s been a pleasure dealing with Waterproofing Sydney and his team for several years now, always on time and takes pride in his work. Would highly recommend to any other builder looking for someone reliable and professional.”
- Hassan Hariri, Google review
I am thoroughly impressed
“Very honest advice given, and saves you a lot of time and money. The quality of workmanship, effort, responsiveness, and the way he explained each step of the roof waterproofing process is second to none. From my initial call to completion of the work, I am thoroughly impressed.”
- Simon Lata, Google review
2. Mister Membrane

Address: 13/45 Green St, Banksmeadow NSW 2019
Mister Membrane is a licensed waterproofer that serves clients in multiple sectors, anywhere within Sydney. With over 40 years of combined experience in waterproofing and building, they’ve got the expertise to deliver solid results.
Mister Membrane performs waterproofing for bathrooms, balconies, planter boxes, storage areas, water tanks, and more. For each waterproofing job, they can present a report that details their findings, recommendations, and quotes.
All their services come with warranties ranging from 7 to 20 years — so you know they truly stand by the quality of their work.
Nearly all of the Mister Membrane customers we talked to had good things to say about the business, including praise for the quality of work, professionalism, thoroughness, and speed.
That said, we did hear one report about a lack of responsiveness from the team, and we also couldn’t find any specific pricing listed on the business website.
Cannot fault a single thing!
“The team is incredibly professional, friendly, and always delivers high-quality work. Their attention to detail and commitment to getting the job done right has been outstanding. I highly recommend Mister Membrane to anyone needing reliable and expert waterproofing services!”
- Peter Hardy, Google review
We couldn’t recommend them more
“We had George and his team do the waterproofing membrane for our class 2 build in Fairlight. We couldn’t recommend them more. They are fast, efficient, punctual and everything passed a secondary inspection by a third party. I will be using Mister Membrane for all our builds from here on out.”
- Lewis Haines, Google review
3. JK Waterproofing Solutions

Phone: 0401 590 583
Business hours: 6:00 am – 6:00 pm (Every day)
JK Waterproofing Solutions is a licensed and accredited waterproofing firm that serves residential, commercial, and industrial properties of any size. Strata managers and developers are on the client list as well. The business’ services are available Sydney-wide.
The company’s expertise includes waterproofing for bathrooms, balconies, flat concrete roofs, walls, water tanks, and more. They can seal or caulk masonry and brick walls, including injections that use epoxy resin to fill in any cracks in concrete walls.
Notably, they also do torch-on waterproofing services, in which a waterproof layer is added onto an existing surface via low-pressure gas torch.
All the work the team performs is compliant with Australian quality standards. Depending on the specific task, they offer 6 to 25-year warranties on their work.
We didn’t see many customer reviews for JK Waterproofing Solutions, but those we got mentioned an overall great experience with the team’s punctuality and reliability. You’ll have to get in touch with the company directly to get their pricing information, though.
A breath of fresh air
“James was a breath of fresh air. He always arrived when he said he would, returned calls, and was very punctual. James fitted us in and fixed a dodgy bathroom job that required fixing urgently. He repaired the work required and suggested a couple of preventative touch-ups all within the quoted price.”
- Mandy Farrar, Google review
Best experience I’ve had with tradesmen
“Jawad is a great communicator, he kept me abreast of the situation at all times. He never assumed he had the job, he just provided me with information and reassurance throughout. Tim and the boys arrived on time and efficiently did the screed. Two days later the waterproofing was being laid by Noah and Jawad. The newly waterproofed roof got a great workout during the large amount of rain we got. It is a dream to see that area not leak.”
- Cee Jae, Google review
4. Remseal

Address: Barker Street, Randwick
Phone: 1300171091
Business hours:
- Monday – Friday: 7:00 am – 4:00 pm
- Saturday: 7:00 am – 12:00 pm
- Sunday: Closed
Remseal finds and diagnoses water leaks, while also providing waterproofing services, for homes and businesses all across NSW. The business owner personally has 23 years of experience in the building industry, and the company as a whole has over 4 decades of expertise with waterproofing.
Remseal does waterproofing for a property’s balconies, rooftops, bathrooms, and even the structural foundation. They can apply waterproof membranes to concrete surfaces, install waterstops of various materials to joints and tunnels, and perform torch-on waterproofing.
Besides waterproofing, the business also does remedial leak detection. This means they find water leaks anywhere in a home or building, and then plug it up before it causes additional or long-term damage.
Users love Remseal’s quality of work and initiative; the team can adapt to problems and adjust the scope of work as needed. Their waterproofing can also survive heavy rainfall. You’ll need to call them directly to get an idea of their pricing, though.
Greatly appreciated
“We’ve been dealing with a very challenging leak on and off for the last year, and it’s been an absolute nightmare. Sam came, used his variety of expensive-looking sensors and equipment to check so many different areas, and really gave me the peace of mind I was looking for. He left afterwards and I felt so much better, and taught me a few lessons for next time as well. Greatly appreciated and the guy was such a pleasure to deal with.”
- Jack D, Google review
We would definitely recommend Remseal
“We had water coming into my kitchen from the outside through the brickwork after heavy rainfall which was getting progressively worse. Contacted Sam at Remseal who came out straight away and provided a quote and advice. We went ahead, and once the job was underway, it became apparent the job was much bigger than anticipated. Sam spent his own time rectifying the issues and found there were more leaks, and he was always updating us on progress, and nothing was ever too much of a problem. He provided great customer service and we are more than happy with the job.”
- Darren Robinson, Google review
5. Titan Waterproofing Services

Address: 100 Barangaroo Ave, Barangaroo NSW 2000
Phone: 1300 761 219
Business hours:
- Monday – Friday: 9:00 am – 5:00 pm
- Saturday and Sunday: Closed
Titan Waterproofing Services specialises in commercial and strata waterproofing, with over 40 years of combined experience between its trained staff members. They can also work on residential properties, and they operate all throughout Sydney.
The company performs remedial waterproofing (finding and fixing leaks), membrane and torch-on waterproofing, epoxy coatings (such as for flooring and walkways), and waterstop installation.
The team can work with concrete walls, and can also further proof wet areas such as swimming pools, balconies, and rooftops. They can enhance the protection of any exposed areas of a home or building, as well as internal areas such as joints and seals which may need repair.
The company’s 4+ decades of industry expertise gave us peace of mind — and that’s not even mentioning the $20 million Public Liability Insurance they have. Take note that the business is closed on weekends, however.
Highly recommended
“Friendly, professional and high quality work. Highly recommended.”
- Chris Manns, Google review
