Membrane Waterproofing

Your Trusted Membrane Waterproofing Experts

When you choose us for your membrane waterproofing needs, you’ll receive more than just quality workmanship. You’ll get expert advice tailored to your project. We take the time to understand your site conditions, walk you through the most suitable options, and explain exactly why they’ll work.

At Stop & Seal, we use high-performance polyurethane, cementitious and acrylic membranes across both new builds and remedial applications. From planter boxes and rooftops to wet areas, retaining walls and more, our systems are built to last and backed by manufacturer and applicator warranties of up to 15 years.

What Sets Us Apart

Expert Free Consultation & Honest Advice

We don’t just apply membranes, we help you understand them. Every project starts with a full free consultation to ensure you get the most suitable membrane waterproofing system for your specific needs.

Tailored Remedial & Preventative Solutions

From repairing failed membranes to installing complete new systems, we offer both remedial and preventative waterproofing designed to protect your property for the long haul.

Manufacturer-Approved Applicators

Our team is trained and approved by membrane manufacturers, ensuring every system is installed to the highest standard.

Up to 15-Year Warranty

We offer a combined Manufacturer/Applicator warranty of up to 15 years, giving you long-term confidence in the work we deliver.

Premium-Grade Membranes

We offer a wide selection of high-quality polyurethane, cementitious, and acrylic membranes, ideal for both new builds and remedial applications, including wet areas, rooftops, planter boxes, and more.

Understanding Membrane Waterproofing

What is Membrane Waterproofing?

Membrane waterproofing is a technique used to prevent water from penetrating a structure by applying a seamless, watertight barrier over the surface. Depending on the product and environment, membranes may be sprayed, rolled, or poured. Once cured, they provide critical protection against leaks, water damage, and long-term structural degradation.

It’s a widely trusted solution across commercial and residential builds and a core part of modern waterproofing systems.

Choosing the Right Membrane

Waterproofing membrane success depends on more than just materials, it comes down to choosing the right system for the specific conditions of your project. With our industry knowledge and on-site experience, we make informed decisions that ensure long-term performance.

Our team ensures the membrane system we recommend is tailored to the unique conditions of each site. We offer a free consultation to walk you through our reasoning, so you’re confident that the system is fit for purpose.

Here’s what we take into account when choosing a membrane waterproofing system:

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Purpose of the area

Is the surface going to be walked on regularly?
Will it hold planter boxes or other weight-bearing structures?

Each application demands different membrane properties, from trafficable finishes to root-resistant barriers.

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Location

External areas are exposed to the elements: rainfall, UV rays, and temperature fluctuations can all affect membrane performance.

For example, an exposed rooftop may require a UV-stable topcoat.

Internal areas, like basements, often deal with hydrostatic pressure, especially in coastal regions where saltwater may also contribute to corrosion.

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Long-term stresses

We consider long-term exposure factors like:

Constant moisture and root pressure in planter boxes.

Salt, heat, and humidity in coastal environments.

Movement and expansion in structural elements over time.

 

Where We Use Membrane Waterproofing

We install high-performance membrane systems across a wide range of internal and external applications of residential, commercial, and industrial sites:

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Planter Boxes

Need root-resistant and moisture-tolerant membranes

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Rooftop & Podiums

Trafficable or non-trafficable, exposed to UV and weather.

Large-scale horizontal surfaces requiring layered protection

Example

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Carparks

Open or underground carparks with exposed concrete require weatherproof, durable systems

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Soffit Slabs & Basement Ceilings

Below-ground spaces prone to leaks, hydrostatic pressure, and concrete cancer; often require membrane protection across walls, floors, and ceilings
Example
Image of a retaining wall, can't see the water ingress on this side but water ingress is leaching into the basement. Hence need for rectification.

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Retaining Wall

Below-ground or partially exposed walls requiring continuous waterproofing to prevent moisture intrusion and structural degradation

Image of a retaining wall, can't see the water ingress on this side but water ingress is leaching into the basement. Hence need for rectification.

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Lift Pits

Where below-ground water ingress is a risk

Image of a retaining wall, can't see the water ingress on this side but water ingress is leaching into the basement. Hence need for rectification.

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Why Do Some Membranes Fail?

Membrane failures generally fall into two categories: avoidable and inevitable.

Avoidable failures include

– Incorrect installation

– Using a membrane that doesn’t meet the specific site requirements

Inevitable failures

Inevitable failures occur over time, even with the best system in place. Most membranes have a lifespan of around 15 years, with deterioration caused by:

– UV exposure

– Constant or heavy foot traffic

– Thermal expansion/contraction of the substrate

– Repetitive movement of equipment or objects

Signs Your Membrane is Failing:

Keep an eye out for clear signs such as bubbling, cracking, leaks, or staining. For a full breakdown of what to watch for, check out our blog post: Signs of Membrane Failure

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Key Weak Points to Watch

Roof drains

Poor detailing allows water ingress

Water tanks

Inadequate base sealing

Pipe penetrations

Cracking at the junction

Can You Just Patch a Failing Membrane?

 

In some cases, yes. But when failure is widespread or due to poor installation, patching isn’t enough. A full membrane rectification may be necessary for lasting protection. We’ll help you assess and advise the best long-term fix. (Blog: When Patching Isn’t Enough)

Key Weak Points to Watch

Roof drains

Poor detailing allows water ingress

Water tanks

Inadequate base sealing

Pipe penetrations

Cracking at the junction

Client Reviews

– Daniel Morgan

We have tried many options to try and stop the leaking in our basement carpark. The boys from Stop and Seal rolled in and in a few day managed to fix a water problem we had been fighting for years.

– Phillip Jones

I have never seen a waterproofing solution work so well. I wouldn’t hesitate to recommend Stop and Seal to anyone with water problems.

– Craig Nickson

Robbie and the team at Stop and Seal are at the top of the game. They solved a water problem in our unit block that we had been dealing with forever. Now when it rains we aren’t nervous.

Brett Cooper, Director, Tweed Ultima Apartments

We have been caretakers of Tweed Ultima Apartments for around 2+ years, At this time we have engaged Stop and Seal to do water leak rectification on 6 or more problem areas around the property. Each leak has been assessed and whilst Stop and Seal have needed to attend to the same problem area more than once, the important thing is they have kept coming back out. All but 1 of our 6 issues have been resolved and some of these leaks have been issues over 12 years that no one else could fix. I highly recommend Stop and Seal their innovative rubber and activator and most of all their commitment to getting the job done.

Wayne Syrch, Site Manager, Hutchinson Builders

I have utilised the services of Stop & Seal on several occasions and have found them to be reliable, professional, and most of all, come with a can-do attitude. The SNSeal product is unique in its application, but most importantly it works, and I’ve seen great results when no one else was willing to attempt to solve an issue. I have great pleasure in recommending their services.

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