Will Interlocking Concrete Block Hold Water?

Will Interlocking Concrete Block Hold Water?

Water is a factor you should always consider when creating a new structure, as it can affect everything. In this blog, we will answer the question ‘Will interlocking concrete blocks hold water?”

PPC Concrete Products is here to provide the answers you may be looking for whilst giving you an insight into the quality concrete options we supply. Our supplies are fit for purpose and generally provide no issues with building regulations, not to mention being safe to use for a variety of construction needs.

The demand for construction is only increasing, on a private and industrial level. Whichever side you fall into, An interlocking concrete block may be an option to help keep your site secure regardless of its shape.

Let us tell you more about the uses and benefits of interlocking concrete blocks below.

What is a interlocking concrete block?

As building regulations came into being in England, the requirement of having fireproof dwellings was compulsory, this was achieved by subsequent houses being made of stone and brick. Interlocking concrete blocks present a modern alternative.

Interlocking Concrete Blocks are a unique form of pre-cast concrete blocks that are designed to hold together by using pre-measured studs and recesses.​ These concrete blocks are built with unique profiles and features, which allow them to fit perfectly into each other.

What are the advantages of interlocking concrete blocks?

Disadvantages of using interlocking concrete blocks

  • Can’t be moved without machinery
  • Can topple over if not placed on level ground

What are interlocking concrete blocks used for?

PPC Concrete Products supply interlocking concrete blocks, we can share with you what they are used for.

  • Material Storage bays
  • Blast walls
  • Salt stores
  • Crash protection
  • Push walls
  • Security barriers
  • Segregation bays i.e recycling centres
  • Retaining walls
  • Industrial buildings
  • Fire breaks
  • Counterweights
  • Roadblocks

Do Interlocking concrete blocks need cement?

No, interlocking concrete blocks bypass the need for any binding elements such as cement. As the name suggests, the ‘interlocking’ part refers to the ability of these blocks to create a secure connection between each other through studs and recesses.

In instances where you want to build a wall with interlocking concrete blocks, you just need to stack them, making sure the studs on top of the base block have connected with the recesses on the block above it and so forth.

In the long term, using interlocking concrete blocks can save money that would otherwise be spent on cement, and time that would otherwise be spent on applying the cement and waiting for it to dry properly before proceeding.

Will interlocking concrete blocks hold water?

Will interlocking concrete blocks hold water?

Firstly, we must address our definition of ‘holding water’. For us, holding water means absorbing water.

With this understanding, we can say that our interlocking concrete blocks do not hold water. To an extent. To clarify, our blocks do absorb a nominal amount of moisture, concrete is not porous by nature, which means water has difficulty penetrating it deeply.

So what will this result in? It means that a vast majority of water that falls upon a concrete block will pool across the top as much as it can until it pours over the edges. This is why concrete structures made with interlocking concrete blocks require some drainage.

Does rain affect interlocking concrete blocks?

No, interlocking concrete blocks are weather resistant, this means rain isn’t going to affect the blocks to a degree where it affects their usability.

Why doesn’t water penetrate concrete?

The molecular structure of concrete is much tighter, and the binding agents used in creating concrete ensure this refined level of molecular fortitude. This is reinforced by the natural curing process that further strengthens the concrete block.

Why shouldn’t you have a material that is affected by water?

Due to water being so regularly apparent, especially with UK weather, you will be confronted by water whether that is through rain or condensation.

This means, using a material that is affected negatively by water will result in your structure being compromised, or becoming weaker over time, if water makes this particular material gain weight to a large degree, then it could be dangerous for the structure’s stability.

How high can you stack interlocking concrete blocks?

Our interlocking concrete blocks have the potential to have 5 blocks stacked upon each other. Our standard-sized blocks are 60cm in height, with 5 stacked together this would equate to 300cm, which is exactly 9 feet & 10.11 inches high. This height is more than enough for applications such as a retaining wall and so much more.

Stacking our interlocking concrete blocks is made easy, safe and secure through the studs and recesses that are on all of our blocks, once they are connected, they are not loose. The beauty of this simple method is that it eliminates the need for cement to bind the blocks together.

What happens if I stack interlocking concrete blocks too high?

In this instance, stacking blocks too high may make them less stable, this is why interlocking blocks have a certain amount of applications, as wide as they may be. Like with any structure, interlocking concrete blocks can fall if stacked too high, this can be amended with secure and stable foundations, but our blocks are suitable for temporary buildings as opposed to homes.

How much do interlocking concrete blocks cost?

If you are considering the cost of our interlocking concrete blocks, we encourage you to get in touch. Having a solid idea of what you intend to use the blocks for, including the space they’re going into, and how much you need will make it easier for us to give you a quote.

Understandably, the cost will be dependent on the amount required, and the sizes of the individual blocks you require.

However, if you’re still deciding whether or not to use our blocks, and would like specific questions to be answered in relation to your project, we are happy to provide all the information you need once you get in contact.

How much do interlocking concrete blocks weigh?

In regard to the weight of the blocks, it will vary from size to size, and from the concrete being used. But as an example, 1800 x 600 x 600 concrete block can weigh 1560 kg, this can fluctuate as different types of concrete have different levels of density.

Purchase interlocking concrete blocks today

Purchase interlocking concrete blocks today

As an established supplier all over the UK, PPC Concrete Products is always happy to help, which is why we encourage you to get in touch with any questions you may have or take a look at our FAQ.

In this article, we hope to have answer the question ‘Will interlocking concrete blocks hold water?’, whilst also providing extra information in regard to construction solutions that we offer.

Take a read of our case studies to truly understand how we have provided solutions for business in the past with the use of our interlocking concrete blocks, and ultimately, how we can help you today.

Read our blog page for more insights into our passion, construction.


The Old Gasworks,

Higginshaw Lane,




Opening Hours:

Monday to Friday – 8 AM til 4 PM

Tel: 01706 655245

Email: info@ppcconcreteproducts.co.uk

Share on Facebook Share on Twitter Share on Google