Pros and Cons of Interlocking Concrete Blocks

Pros and Cons of Interlocking Concrete Blocks

With many types of building solutions on the market, it could be challenging to know what option would suit your needs, whether you are building temporary storage or a retaining wall.

In this blog, we at PPC Concrete Products will discuss the pros and cons of interlocking concrete blocks.

With time and cost-efficient building solutions being needed, as construction output in Great Britain has seen an increase, alternatives to traditional brick-and-mortar builds are required for those looking to save time and money.

Interlocking concrete blocks present an alternative to some construction needs. Let us tell you more about them.

Having an understanding of the pros and cons of interlocking concrete blocks can help you make an informed decision on if our blocks are suitable for your project.

Explaining interlocking concrete blocks

How Do You Face Interlocking Concrete Blocks?

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. Built with unique profiles and features, which allow them to fit perfectly into each other without the use of any mortar. Instead, the cementitious blocks simply snap together with each other.

Depending on the size of the block that is chosen will affect the number of studs that are on the block. In regards to the sizing, interlocking concrete blocks don’t need mortar to be held in place. This means the speed of building is improved, whilst using less manpower.

Other concrete providers may offer “concrete lego blocks” The differences between the two aside from their names are nominal.

Other suppliers may offer alternative styles and sizes than us. As a result, you may be paying a premium price for it.

Pros and cons of interlocking concrete blocks

What is the cost of a concrete barrier?

The following pros and cons are here to help you understand the potential benefits or hindrances that these blocks can grant. Ultimately though we always advocate our quality blocks, we understand that they may not be suitable for all projects.

With that in mind, here are the pros and cons of interlocking concrete blocks.

The pros of interlocking concrete blocks

  • Longer lasting and more durable than a Gabion basket
  • Quicker and less hassle to install
  • No need for mortar, saving you money and time
  • No need for steel reinforcement or shuttering
  • Resistant to extreme weather conditions
  • Fire-resistant properties, mitigating the spread of fire depending on the structure
  • Little maintenance required
  • Often, no foundation is needed before installing
  • Sound resistant
  • Sustainable
  • Ability to stack them upon each other
  • Flexibility in sizes
  • Appropriate for temporary and/or permanent buildings
  • Unlikely to be displaced due to the interlocking function
  • Can be moved with standard lifting equipment

The cons of interlocking concrete blocks

  • Difficult to move safely without the right machinery
  • Sizes may not be favourable for certain projects (though we have various sizes)
  • You must ‘unlock’ them before moving if the blocks are connected
  • Can cause serious injury if not handled and moved safely

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.

Interlocking concrete block cost

If you are considering the cost of our interlocking concrete blocks, we strongly encourage you to get in touch with us. 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.

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.

Interlocking concrete block sizes and styles

Our team at PPC Concrete Products supplies different types of interlocking concrete blocks. Though we have a variety of options when it comes to the interlocking concrete blocks that we make.

The way our blocks are made is by having a casting of the dimensions mentioned below and depending on the option chosen, the cast is then filled with concrete. Each block has a Lifting pin anchor system embedded in the concrete at the point of casting – this is how the blocks are moved once the concrete is set.

After setting, the cast is then removed and the blocks are transported to their destination.

we offer the option for your block to be:

  • Standard Blocks
  • Flat Top Standard Blocks
  • Rock Face Block
  • Rock Face Flat Top Block

To view what these options look like, take a look at our gallery.

 Here are our size options:

  • 300 x 600 x 600
  • 600 x 600 x 600
  • 900 x 600 x 600
  • 1200 x 600 x 600
  • 1500 x 600 x 600
  • 1800 x 600 x 600
  • 400 x 800 x 800
  • 800 x 800 x 800
  • 1200 x 800 x 800
  • 1600 x 800 x 800

Half and thirds of the sizes displayed are also offered with your order if needed.

Forklift-Friendly Concrete Blocks

Fork Lift

Our forklift-friendly concrete blocks hold all of the benefits that have been mentioned previously, in addition, forklift-friendly concrete blocks present a great opportunity to manoeuvre concrete blocks in a more intricate fashion due to the manoeuvrability of the forklift.

This is Ideal for situations in which larger equipment would struggle to place a concrete block.

PPC Concrete Products, alongside providing Interlocking Concrete Blocks, Jersey Barriers (and more) also are proud to also provide forklift-friendly concrete blocks, which we refer to as Fork Lift Blocks.

Fork Lift Blocks are ideal for Security barriers, traffic management, Blocking Entrances, test weights, and counterweights.

What size are Forklift Blocks?

We now offer the 1800x 600 x 600 mm (1560kg) and the 1600x 800 x800mm (2460kg) block with forklift slots.

Why do interlocking concrete blocks interlock?

The interlocking feature of our blocks is there to facilitate stability and security. These blocks have the potential to be stacked as well. Interlocking them distributes the stability of the overall structure it is helping to create.

A better level of stability means that the structure will be far less likely to overturn or become unbalanced. Interlocking the blocks also reduces the need for mortar.

How long do interlocking concrete blocks last?

Concrete is resilient by nature, it can last for a number of years and beyond without any serious degradation. The only exception to this is if the blocks are in an environment in which they regularly receive forceful impact.

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 supplied enough pros and cons of interlocking concrete blocks to help you make the right choice for your project. 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


01706 655245


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