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Concrete Blocks

Concrete blocks or breeze blocks are ideal for multiple uses such as building foundations and separating walls.

The range includes hollow blocks, solid blocks and foundation blocks. From lightweight blocks, low density blocks and high strength blocks you can purchase online or in your local branch. 

Shop from industry trusted brands such as Celcon, Plasmor and Tarmac, supplying the best quality essential building supplies. 

 

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  • Concrete Block Solid Insulite Block 7.3N 400 x 215 x 100mm Concrete Block Solid Insulite Block 7.3N 400 x 215 x 100mm

    Concrete Block Solid Insulite Block 7.3N 400 x 215 x 100mm

    Make sure you look at our building blocks range today and let us help you to build your next project!
  • Celcon Block Standard Grade Block 440 x 215 x 100mm Celcon Block Standard Grade Block 440 x 215 x 100mm

    Celcon Block Standard Grade Block 440 x 215 x 100mm

    H+H Standard Grade Celcon Blocks (440mm x 215mm x 100mm) are a versatile all-round performance block for use in construction. Their strength makes them popular for applications such as building solid or separating walls, and for the internal and external...
  • Concrete Block - Airtec Foundation Block 7.0N - 300 x 275 x 140mm Concrete Block - Airtec Foundation Block 7.0N - 300 x 275 x 140mm

    Concrete Block - Airtec Foundation Block 7.0N - 300 x 275 x 140mm

    These 7N concrete blocks are a high-density product that is manufactured by compressing the concrete and fine sands together, which makes them extremely durable. It can be used with a variety of load-bearing applications in your home or business; such as...
  • Celcon Coursing Units Standard Grade Block - 215 x 65 x 100mm Celcon Coursing Units Standard Grade Block - 215 x 65 x 100mm

    Celcon Coursing Units Standard Grade Block - 215 x 65 x 100mm

    Celcon Coursing Units 215mm x 65mm x 100mm are an aircrete product used for masonry coursing (a horizontal row of the same unit in a wall). These durable and strong blocks are used for external and internal load bearing and non-load bearing positions...
  • Celcon Block Standard Grade Block - 440 x 215 x 140mm Celcon Block Standard Grade Block - 440 x 215 x 140mm

    Celcon Block Standard Grade Block - 440 x 215 x 140mm

    440mm x 215mm x 140mm H+H Celcon Blocks (Standard Grade) are a versatile all-round performance block for use in construction. Celcon Blocks are extremely popular for applications such as building separating or solid walls, and for the internal and...
  • Celcon Block Standard Grade Block - 440 x 215 x 75mm Celcon Block Standard Grade Block - 440 x 215 x 75mm

    Celcon Block Standard Grade Block - 440 x 215 x 75mm

    Standard Grade Celcon Blocks 440mm x 215mm x 75mm are a valuable all-round performance construction block. Standard Blocks are brilliant for a number of applications such as building separating or solid walls, and for the internal and external leaf of...
  • Celcon Block Standard Grade Block - 440 x 215 x 215mm Celcon Block Standard Grade Block - 440 x 215 x 215mm

    Celcon Block Standard Grade Block - 440 x 215 x 215mm

    H+H Celcon Standard Grade Blocks 440mm x 215mm x 215mm are a flexible all-round performance construction block. Celcon Blocks are great for applications such as building separating or solid walls, and for the internal and external leaf of cavity walls...
  • Concrete Padstone 440 x 215 x 102mm

    Concrete Padstone 440 x 215 x 102mm

    A Concrete Padstone is strengthened, making it extremely durable. Its purpose is to distribute excessive weight from above, usually to support the roof.
  • Tarmac Concrete Block Topcrete Hollow Standard Block 7.3N 440 x 215 x 215mm Tarmac Concrete Block Topcrete Hollow Standard Block 7.3N 440 x 215 x 215mm

    Tarmac Concrete Block Topcrete Hollow Standard Block 7.3N 440 x 215 x 215mm

    The Topcrete Hollow Standard Board is 440 x 215mm 7.3n. The block is dense and robust, and offers acoustic properties that are ideal for use in most types of property. Ideally used in walls and floors, both above and below ground. Suitable for render,...
  • Tarmac Concrete Block Hemelite Standard Solid Block 7.3N 440 x 140 x 215mm Tarmac Concrete Block Hemelite Standard Solid Block 7.3N 440 x 140 x 215mm

    Tarmac Concrete Block Hemelite Standard Solid Block 7.3N 440 x 140 x 215mm

    Hemelite are lightweight blocks that are suitable for many load-bearing applications. It can be used in a variety of walls including external and internal solid walls, cavity walls and internal separating walls. Hemelite can also be used in block floors...

  • Thomas Armstrong Concrete Commons Block 7.3N/mm2 215 x 100 x 65mm

    Concrete Common units also known as ‘frogged bricks’ are coursing bricks which are designed to work in conjunction with Thomas Armstrong’s Dense Concrete Blocks for applications above and below damp-proof course (DPC). Our concrete coursing bricks are...
  • Celcon Foundation Block Standard Grade Block - 440 x 215 x 300mm Celcon Foundation Block Standard Grade Block - 440 x 215 x 300mm

    Celcon Foundation Block Standard Grade Block - 440 x 215 x 300mm

    Standard Grade 440mm x 215mm x 300mm Celcon Blocks are a useful all-round performance construction block. Celcon Standard Blocks are excellent for multiple applications such as building separating or solid walls, and for the internal and external leaf of...
  • Celcon Block High Strength Grade Block - 440 x 215 x 100mm Celcon Block High Strength Grade Block - 440 x 215 x 100mm

    Celcon Block High Strength Grade Block - 440 x 215 x 100mm

    Celcon 440mm x 215mm x 100mm are High Strength Grade Blocks, manufactured for use in the internal and external leaf of cavity walls. The H+H High Strength Celcon block is an integral construction block and can be used to for a wide range of building...
  • Tarmac Concrete Block Topcrete Standard Foundation Block 7.3N 300 x 274 x 140mm Tarmac Concrete Block Topcrete Standard Foundation Block 7.3N 300 x 274 x 140mm

    Tarmac Concrete Block Topcrete Standard Foundation Block 7.3N 300 x 274 x 140mm

    Standard foundation blocks are specifically for use below DPC in solid walls that replace traditional innter and outer leaves. One layer helps save construction time and they have recessed grooves in the block to ease handling
  • Concrete Padstone 440 x 215 x 140mm

    Concrete Padstone 440 x 215 x 140mm

    Concrete Padstones are a multi-purpose block that comes in a variety of sizes. They are a good block to utilise because of their ability to handle huge weights and may be positioned in any direction to suit the unique project. The strengthened Padstone...
  • Celcon Block High Strength Block - 440 x 215 x 140mm Celcon Block High Strength Block - 440 x 215 x 140mm

    Celcon Block High Strength Block - 440 x 215 x 140mm

    Celcon 440mm x 215mm x 140mm High Strength Blocks are manufactured for use as building blocks for the internal and external leaf of cavity walls. The H+H High Strength Celcon block is an integral construction block and can be used to for a wide range of...
  • Celcon Block High Strength Block - 630 x 215 x 100mm Celcon Block High Strength Block - 630 x 215 x 100mm

    Celcon Block High Strength Block - 630 x 215 x 100mm

    Celcon 630mm x 215mm x 100mm High Strength Blocks are ideal for use as internal and external leaf construction blocks in cavity walls. Because of their enormous strength, they're ideal for applications like solidifying or separating walls. The H+H High...
  • Celcon Block High Strength Grade Block - 440 x 215 x 215mm Celcon Block High Strength Grade Block - 440 x 215 x 215mm

    Celcon Block High Strength Grade Block - 440 x 215 x 215mm

    Celcon 440mm x 215mm x 215mm are High Strength Grade Blocks, produced for use in the internal and external leaf of cavity walls. The H+H High Strength Celcon block is an integral construction block and can be used to for a wide range of building needs,...
  • Celcon Block Solar Grade Block - 440 x 215 x 100mm Celcon Block Solar Grade Block - 440 x 215 x 100mm

    Celcon Block Solar Grade Block - 440 x 215 x 100mm

    Solar Grade Celcon Blocks 440mm x 215mm x 100mm are perfect for use as building blocks for the internal and external leaf of cavity walls. Solar Grade blocks are mainly used for applications where high thermal performance is a priority. H+H Celcon blocks...
  • Celcon Block Solar Grade Block - 440 x 215 x 215mm Celcon Block Solar Grade Block - 440 x 215 x 215mm

    Celcon Block Solar Grade Block - 440 x 215 x 215mm

    H+H Solar Grade Celcon Blocks 440mm x 215mm x 215mm are perfect building blocks for the internal and external leaf of cavity walls. Sturdy Solar Grade blocks are often used for applications where high thermal performance is a priority. H+H Celcon blocks...
  • Celcon Block Standard Grade Block - 440 x 215 x 150mm Celcon Block Standard Grade Block - 440 x 215 x 150mm

    Celcon Block Standard Grade Block - 440 x 215 x 150mm

    440mm x 215mm x 150mm H+H Standard Celcon Blocks are a versatile all-round performance construction block. Celcon Blocks are great for applications such as building separating or solid walls, and for the internal and external leaf of cavity walls. H+H...
  • Celcon Foundation Block High Strength Grade - 440 x 215 x 300mm Celcon Foundation Block High Strength Grade - 440 x 215 x 300mm

    Celcon Foundation Block High Strength Grade - 440 x 215 x 300mm

    Celcon High Strength Foundation Blocks are made of the same aircrete as ordinary Celcon Blocks, but they're designed to provide more support as a foundation for a structure. They can be used to support solid or hollow walls, framed or suspended floors,...
  • Celcon Plus Block High Strength Grade Block 7.3N - 630 x 215 x 100mm Celcon Plus Block High Strength Grade Block 7.3N - 630 x 215 x 100mm

    Celcon Plus Block High Strength Grade Block 7.3N - 630 x 215 x 100mm

    Plasmor's proprietary man-made expanded clay is used to make FIBOLITE, an ultralight load bearing block. Expanded clay nodules are made using sophisticated pyrogenic technology, in which geochemically specific clay is expanded at high temperatures in a...
  • Celcon Plus Block Solar Grade Block - 630 x 215 x 100mm Celcon Plus Block Solar Grade Block - 630 x 215 x 100mm

    Celcon Plus Block Solar Grade Block - 630 x 215 x 100mm

    Celcon 630mm x 215mm x 100mm Solar Grade Blocks are perfect for use as building blocks for the internal and external leaf of cavity walls. Solar Grade blocks are mainly used for applications where high thermal performance is a priority. They are great...

Blocks

Blocks (also known as building blocks) are manufactured from concrete or cement for use in construction. They are similar to bricks but lightweight, larger in size, and chosen for function rather than appearance. They usually have a hollow core giving them good insulating properties. Blocks are often used as foundation blocks, or to construct loadbearing or retaining walls.

Types of blocks:

At Howarth we offer a variety of blocks, including:

Concrete Block


Concrete blocks are manufactured from concrete, cast in a mould. They are a popular choice due to being inexpensive, strong, and durable.

Solid Block


Dense Concrete Blocks are adaptable for several building applications, both above and below ground, particularly useful for building cavity or solid walls. Solid blocks with a standard finish provide an excellent base for plastering or rendering.

Lightweight Block


Lightweight blocks are manufactured from expanded clay aggregate, with a ceramic exterior and honeycomb centre. These blocks offer great thermal and sound insulation. Being lightweight, these blocks can be considered safer and easier to work with, whilst still being strong and insulating.

Hollow Block


Hollow blocks are excellent for structural work including high strength retaining walls, external walls, and cavity walls. They are incredibly durable, fire resistant and low maintenance. Plaster or render can be applied if you wish to paint them with a nice finish.

Breeze Block


Breeze blocks are a structurally reliable option, with excellent insulation properties. They are sometimes referred to as Cinder Blocks, as they are manufactured from cinder (coal) aggregate.

Foundation Block


Foundation blocks are manufactured from concrete and more economically friendly in comparison with older foundation materials.

Aerated Blocks


Aerated blocks are lightweight, strong, and reliable. They are commonly used as infill for beam and block flooring. Other uses include building cavity walls, separating walls, foundations, as well as flanking and partition walls. The most commonly used aerated block is the H+H Celcon Block, available in Solar, Standard, High Strength, and Super Strength grades

Frequently Asked Questions

What size is a concrete block?
Building blocks are manufactured in a number of sizes, the most popular size is known as a ‘standard block size’ and measures 440mm x 100mm x 215mm. If you are unsure of which block type is best for your project, please contact your friendly local Howarth branch.
How many blocks in a square metre?
A single block wall requires 10 blocks per square metre.

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