waterproofing concrete in Sydney

To help you make the best decision for your concrete, we have put together this ultimate guide to waterproofing concrete in Sydney.

Waterproofing concrete is essential for any structure located in Sydney. The city’s humid, subtropical climate means that concrete is constantly exposed to moisture, which can lead to several problems, such as mould growth, efflorescence, and spalling.

Waterproofing your concrete will extend its lifespan and improve its appearance and performance.

2. Prevents Mould and Mildew Growth:

Mould and mildew growth on concrete can be an eyesore and cause respiratory problems for those living or working nearby. It can also reduce the lifespan of concrete by causing spalling and cracking due to increased pressure from growing roots inside the substrate. Waterproofing protects against mould growth by preventing moisture from entering through cracks or joints in your concrete surface.

3. Protects Against Chloride Ion Penetration:

Waterproofing concrete protects against chloride ion penetration (CIP). Chloride ions are present in most deicing salts and road salts used in Australia. When they come into contact with your concrete surface and dissolve it, they produce a white salt deposit called efflorescence. Efflorescence is unsightly and can even damage your property if left untreated.

waterproofing concrete in Sydney

4. Increases the Lifespan of Concrete:

Concrete is vulnerable to moisture penetration from rain or groundwater because it has low resistance to water. Therefore, even when properly cured and sealed, it can still suffer from water damage if left untreated or if not maintained properly by owners/tenants who fail to maintain their property after construction work has been completed.

5. Improves Appearance and Performance:

Concrete is susceptible to damage from moisture because it has a porous surface that can allow water molecules to pass through and cause internal damage. Waterproofing your concrete will allow it to breathe while preventing unwanted moisture from entering the structure. This will also protect against harmful bacteria or mould growth.

6. Concrete can save your money:

Concrete and rubber deck tiles are Sydney’s most popular building materials because it’s affordable and versatile. However, if your home or business has concrete foundations or walls built with poor drainage, they could cause expensive damage over time. Water seeping into your foundation can cause dampness inside your home or office.


Always follow the manufacturer’s instructions and give your concrete a thorough rainwater test to ensure the waterproofing job is successful. Remember, take measures to waterproofing concrete in Sydney to avoid ending up miserable with mould problems. It’s also important to note that installing a waterproofing system over a poorly prepared surface will not necessarily result in a well-functioning waterproofing installation.

Related Resource: Waterproof Concrete Supplies Sydney , Waterproofing Concrete Products Sydney