About Us

Across the South West

The Maen Karne Family

Maen Karne comprises Maen Karne Aggregates and Maen Karne Concrete Products (formerly Western Blocks 2010 Ltd). We have four depot locations in Cornwall, one in Devon, another in Somerset and we also have a new block plant in Essex.

We are the South West’s leading independent supplier of bagged and loose aggregate, environmental services, concrete blocks, ready-mix concrete and flowing screed. Our flexible delivery options tailored to each customer will allow you to have the perfect delivery to match your site requirements and the most cost-effective service.

More About Us

Contact Us


Talk to our team about anything from project advice to account queries.

Our Locations


View details of our different locations across the South West.



Find out about job opportunities with Maen Karne.

Social Media


Live updates from the Maen Karne team on the ground.



View our range of business and individual accreditations.

Maen Karne Timeline

  • Portacabin and 3 trucks.

  • Purchase of Eden Aggregates - Artic trucks, Bagging and Clay

  • Start of Cornwall Ready Mix concrete - our first concrete plant

  • Purchase of Western Blocks - a concrete blockworks and two further concrete plants. (Hayle depot)

  • Purchase of Melbur Blockworks (our new head office) - a full static block plant and amalgamation of Artic depot and bagging operations.

  • Maen Karne acquired by GRS.

  • Continuing growth within the bagging division. Our depots consist of Melbur, Henlade, Uffculme, Cardiff and Newton Abbort

Our Core Values


People are at the heart of everything we do. We all look out for one another, and in doing so create a happy, rewarding, safe and healthy workplace.


Together we contribute to something exceptional, building strong working relationships to achieve common goals. We inspire and challenge each other to go beyond, showing leadership, responsibility and trust. Everyone is included, respected and valued.


We're continually improving to ensure we're number one in our chosen markets, in customer service and in people development. Each person contributes to, and shares in, our undisputed success.


We nurture the strengths of every person so they can do their best. We create opportunities for learning and development, supporting every individual to achieve their goals and realise their ambitions.


We work with positivity, passion and flair, seeing obstacles as challenges to overcome. We're agile enough to adapt when things change, yet determined enough to go beyond to make things happen.

Newquay Skatepark

Such an amazing project to have been apart of!

Maen Karne’s ready-mix concrete was used to build a ‘world class’ skatepark in Newquay in Cornwall. Over 400 cubic metres of a specially designed mix has been supplied from both Hayle and Penryn plants for the new Concrete Waves skatepark. The concrete is sprayed on to form the vertical ramps, bowls and half-pipes of the new facility that was built by skatepark specialists Maverick Industries and open in July 2018. This was a great project that we all loved to be apart of.

Follow our Social media accounts to keep up to date with all our current projects.



We pride ourselves on our concrete blocks being manufactured locally, from 100% secondary aggregate making them extremely sustainable.

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