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How does waterproof concrete work?

How does waterproof concrete work?

Concrete isn’t just one of the strongest man-made materials on the planet, it’s also one of the most versatile – adaptable to make it effective under a vast array of conditions.

You might think that concrete is already waterproof – and, indeed, most of it is at the very least water resistant – but there are some projects that require extra protection in this manner. In this article, we’re going to look at how waterproof concrete differs from standard mixes, when and where it should be used and what benefits it can bring to aid your construction project.

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If you’re in need of waterproof concrete solutions for your home or commercial projects, take a look at our dedicated waterproof concrete page to learn more.

Waterproof Concrete

What is waterproof concrete?

Waterproof concrete is created by adding a special admixture to the initial concrete mix to make it even more impermeable. A waterproof concrete additive starts working the moment it’s added, so that there’s no need for any further waterproofing to be carried out once it’s been poured and laid. Once hardened, it becomes practically impervious to both liquid and soil moisture.

When is waterproof concrete used?

A waterproof concrete mix is commonly used in the following situations: 

  • Basements (up to about ten feet deep)
  • Underground car parks
  • Water retaining structures, such as ponds and swimming pools
  • Areas in which there is a high water table
  • Areas that are prone to flooding

At the most basic level, it should be employed anywhere in which it’s vital to maintain a dry environment.

Benefits of waterproof concrete

Protection from water damage: this may be evident from the name, but it’s still worth emphasising, as it’s a very useful feature that can enhance the structural integrity of your building.

Durability: by offering such efficient water resistance, using a waterproof concrete mix can also extend the life of your project; over time, water damage can lead to degradation and weakening of the structure. 

Healthier atmosphere: water-resistant concrete can prevent internal dampness and the growth of mould and mildew, making for a healthier environment for those living or working inside.

Reduced maintenance costs: if the concrete in your structure is degrading because of water damage, you’ll need to carry out extensive maintenance to keep it safe. Over time, that could add up to a substantial sum, making waterproof concrete very cost-effective initial choice in the long run.

Reduced running costs: the prevention of water absorption doesn’t just mean that your building costs less to maintain – it’s also likely to be cheaper to run, because it will cost less to heat in winter and cool in summer. Such energy efficiency can be an important consideration in these times of high energy bills.


If you’re not sure whether your construction project would benefit from using waterproof concrete, why not ask the experts at Stewart Brothers Concrete for advice?

Our team have experience in mixing and supplying concrete to commercial and residential customers across Kent – including in and around Dover, Ashford and Sittingbourne – for over 35 years and know what’s needed to ensure the right solution for your project.

Get in touch now to find out more!

For more information on How does waterproof concrete work? talk to Stewart Brothers Concrete

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