Thomas Armstrong (Concrete Blocks) Ltd
The Home of Concrete Blocks and Block Paving


Thomas Armstrong (Concrete Blocks) Ltd is a leading block paving and concrete block manufacturer in the UK. We believe that the key to success is to ensure that the very best standards of quality and high levels of customer service are at the forefront of any business, and this is one reason why The Thomas Armstrong Group have continually grown and developed as a business since 1830.

With multiple offices and factories located across the North of England, our comprehensive concrete block product range features high quality Lightweight Aggregate Blocks, Dense Concrete Blocks and Airtec Aerated Concrete Blocks for various building requirements across commercial and residential developments. Our Block Paving Bricks range features 'The Lakeland Range' and 'The Armstrong Range' including kerbs and accessories along with a 25-year guarantee.

All our Concrete Block products are compliant to all the latest technical and environmental standards for use in foundation walls, internal walls, acoustic separating walls, thermally insulating walls and permeable paving solutions for driveways.


Make sure you look at our building blocks range today and let us help you to build your next project!

Lightweight and Dense Concrete Blocks

Build Smart & Beautiful

Airtec Aerated Concrete Blocks

Amongst the most environmentally friendly building products available

Block Paving

Irresistibly instagramable Paving that’s made to last

Technical Information

Latest News

Thomas Armstrong continues its expansion

Thomas Armstrong (Holdings) Ltd are pleased to announce their latest acquisition of the Sellite Blocks Limited, a Yorkshire based building block manufacturer. Based in Great Heck near Leeds, Sellite Blocks Limited is a well-established and highly regarded building block manufacturer of eco-friendly building blocks. View more...

Our new Leeds concrete block plant achieves BES 6001 'Excellent' status.

Our new multimillion pound Stocks Bros Ltd concrete block plant in Cross Green Leeds has achieved the highest possible rating of 'Excellent' to the Responsible Sourcing standard BES 6001. This is only the 2nd block plant anywhere to have ever achieved this, the first being our Airtec aerated block plant in Catterick. View more...

Industry-first BES 6001 Responsible Sourcing 'Excellent' rating achieved!

Thomas Armstrong (Concrete Blocks) Limited have become the first block manufacturing company to achieve the highest possible rating of 'Excellent' to BES 6001 Issue 3.0 for Airtec aerated block manufacture. Stocks Bros Ltd achieve a 'Very Good' rating! View more...

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Designed to offer a low weight, load-bearing block with enhanced thermal properties suitable for a wide range of applications.


Lightweight & Dense Concrete Blocks

Our Most Popular Blocks

 Airtec Standard



The perfect all-round aerated concrete blocks giving you a combination of medium strength and high thermal performance in one block.


Airtec Aerated

Concrete Blocks

Lakeland Coniston



Available in 8 different colours. Suitable for residential drives, paths, patios or lightly trafficked roads.


Block Paving
The Lakeland Range

Latest News