How Many Concrete Blocks Do I Need

How Many Concrete Blocks Do I Need

Whether you are new to conducting a construction project, are seeking alternative materials such as Interlocking Concrete Blocks for your structure, in some cases it can be confusing to know what the right amount would be.

By failing to understand the correct amount of concrete blocks you require, you would either be overpaying, or delaying the completion of your structure. Ideally, we want to avoid both of these outcomes, and the best way to do this is through proper planning, research, and understanding.

In this blog, we will provide guidance regarding the question ‘How many concrete blocks do I need?’

At PPC Concrete Products, we are here to provide solutions for your construction needs,

from the person working their own part-time project, to commercial clients, and everyone in-between.

Monthly construction output had risen an estimated 1.6% value in June 2023, and we would like to think our accessible concrete products had a small part to play by giving our clients easy access to reliable and easy-to-use construction solutions.

Is it better to use bricks or concrete blocks?

Is it better to use bricks or concrete blocks?

When it comes to bricks and concrete blocks, it isn’t as simple as saying which option is the better choice. It is all subject to the task at hand. Below, we will share some key information regarding both of these construction options.

There’s no easy answer to whether a concrete block is better than a brick, it all depends on your project! Here’s a breakdown of some key differences to help you decide:

 Bricks and concrete blocks

  • Bricks are traditionally made from clay that is fired at high temperatures. That being said, some modern bricks can include concrete materials.
  • Concrete blocks are made from aggregates such as crushed rock, or sand mixed cement. Concrete blocks can also provide a greater level of durability.

The pros and cons of bricks and concrete blocks


  • Pros: They can be strong, durable, and fire-resistant. They are generally low maintenance and have a classical aesthetic.
  • Cons: They can be expensive and heavier than a concrete block. They are also susceptible to cracking over time.

Concrete Blocks: 

  • Pros: Usually cheaper than bricks, and can be a lighter weight. They have a good level of fire resistance, water resistance, and also offer good insulation. They are also available in different forms, such as interlocking concrete blocks.
  • Cons: They can be prone to cracking and may require more maintenance over time. They are also quite plain in terms of aesthetic, and would require your own personalisations to make it look unique.

How many concrete blocks do I need?

How many concrete blocks do I need?

Understanding the amount of concrete blocks you need is not a one-size fits all universal number, it is completely dependent on various factors which can include, but are not limited to:

  • The size of the perimeter for the structure being constructed.
  • The height of the structure being constructed.
  • The type of concrete block being used.
  • The size of the concrete block being used.

Arguably, the overall size and height of the structure is the key component to consider, as a wider, or taller structure would require more blocks, whilst a smaller structure would require fewer. This however changes depending on the size of the chosen block.

In any instance, you should ensure that any structure you intend to create by using blocks is assessed and has received consultation by an expert, especially if you have not done it before.

Should I order more blocks than I require?

In some cases, depending on the block you opt to use, and the kind of structure they are being used for, it could be wise to order an additional surplus of blocks just in case. However, in most cases it is not necessary, and can be an inconvenience for those with a tight budget.

Can I use more than one kind of concrete block for a project?

In some cases, yes you can, but this is subject to the area being constructed. For example, if they are a part of the same wall, then it would be advisable to not use different types of concrete blocks.

However, if they are used in separate areas of the same build, it is completely feasible to use more than one kind of concrete block on a project.

What is the most versatile concrete block?

What is the most versatile concrete block?

Interlocking Concrete Blocks are one of the most versatile concrete blocks you can use. These special pre-cast blocks do not require mortar in order to create a long-lasting and effective connection, and are available in multiple sizes.

Interlocking Concrete Blocks connect to each other via studs and recesses at the top and bottom of the blocks, respectively. Individually, concrete blocks are heavy, but once they are joined, they provide an excellent counterweight against exceedingly heavy applications like a retaining wall.

Considering the fact they do not require mortar to connect, it is safe to say you will be saving money that would otherwise be spent on binding materials, and even some labour costs. But what actually makes Interlocking Concrete Blocks special? Well, a lot of things.

Here is a list of some of the uses that Interlocking Concrete Blocks can facilitate.

  • 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

What are the advantages 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

Is it better to use mortar for a concrete block?

If you are not using an interlocking concrete block, then yes, it would be better to use mortar to achieve a safe, lasting hold. However, with an interlocking concrete block, this is already achieved once the blocks have been stacked accordingly.

By using these blocks, you would save money that would have otherwise been spent on mortar, and the labour required to lay/stack the blocks by using the mortar.

How high can interlocking concrete blocks be stacked?

Yes, our interlocking concrete blocks have the potential to have 5 blocks stacked upon each other. This means that the fifth topmost can be a flat top concrete block.

When it comes to the height, Our standard-sized blocks are 60 cm in height, with 5 stacked together this would equate to 300 cm, which is exactly 9 feet (2.74 m) & 10.11 inches (ca. 26 cm) high. This means that a flat top concrete block can be placed at a maximum of 9 feet (2.74 m) high.

This superior level of height opens the interlocking concrete block to have the potential to be used in a variety of builds.

Find the best concrete blocks today

Find the best 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 have a look at our FAQ.

In this blog, we hope to have provided guidance by answering the question ‘How many concrete blocks do I need?’ Whilst also providing additional information including 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.


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Higginshaw Lane,




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Tel: 01706 655245


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