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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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  • 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...
  • Celcon Plus Block Standard Grade Block - 630 x 215 x 100mm Celcon Plus Block Standard Grade Block - 630 x 215 x 100mm

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

    Celcon Standard Grade Blocks are an all-round performance block used in construction throughout a build. Their strength makes them great for applications such as building solid or separating walls, and for the internal and external leaf of cavity walls...
  • Celcon Plus Block Standard Grade Block - 630 x 215 x 140mm Celcon Plus Block Standard Grade Block - 630 x 215 x 140mm

    Celcon Plus Block Standard Grade Block - 630 x 215 x 140mm

    Celcon 630mm x 215mm x 140mm Standard Grade Blocks are a versatile all-round performance block used in construction. Their strength makes them great for applications such as building solid or separating walls, and for the internal and external leaf of...
  • Coursing Units High Strength Grade Block - 215 x 65 x 100mm Coursing Units High Strength Grade Block - 215 x 65 x 100mm

    Coursing Units High Strength Grade Block - 215 x 65 x 100mm

    Celcon High Strength Blocks are used as interior and external leaf construction blocks in cavity walls. Their strong strength makes them ideal for constructing solid or dividing walls. The H+H High Strength Celcon block is an essential architectural...
  • Tarmac Concrete Block Hemelite Standard Solid Block 7.3N 440 x 100 x 215mm Tarmac Concrete Block Hemelite Standard Solid Block 7.3N 440 x 100 x 215mm

    Tarmac Concrete Block Hemelite Standard Solid Block 7.3N 440 x 100 x 215mm

    Lightweight aggregate block suited to a number of loadbearing applications. For general use in walls above and below ground and in beam and block floors. Proven high level of technical performance. Easy to handle, high strength to weight ratio, lower...
  • Tarmac Concrete Block Topcrete Hollow Block 7.3N 440 x 140 x 215mm Tarmac Concrete Block Topcrete Hollow Block 7.3N 440 x 140 x 215mm

    Tarmac Concrete Block Topcrete Hollow Block 7.3N 440 x 140 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,...

  • Thomas Armstrong Ultralite Concrete Aggregate Block 3.6N 440 x 215 x 100mm

    These lightweight aggregate blocks are designed to offer the builder a low weight, load-bearing block with enhanced thermal properties suitable for a wide range of applications. Ultralite blocks are manufactured to BS EN 771-3 and are ISO 9001 Quality...

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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