North West

North West

The North West region is led by Michael Roddy and geographically covers England, Wales and the Channel Islands. It comprises four platforms which are detailed below. The North West is primarily focused on the construction industry, which accounts for a majority of the revenue, and the core product group is therefore construction minerals, including pre-cast concrete & concrete products, ready-mix concrete, asphalt & contract services, dimension stone and aggregates.







Channel Islands

Ronez’s operations supply the Channel Islands with aggregates, ready-mixed concrete, asphalt and precast concrete products and services. Operating out of multiple sites across Jersey and Guernsey with satellite offerings on other islands, Ronez offers a full range of high-quality construction products and services. The creation of a shipping division, SigmaGsy, by SigmaRoc upon acquisition of Ronez has helped with transporting dry-bulk materials to and from our own sites as well as third-party sites in the UK and Europe, resulting in higher profits and operational efficiency.

Find out More


Following the acquisition of the Johnston Quarried Group in January 2022, the Group established its England Platform focusing on quarried and mined limestone for the construction market.

Johnston is a specialist quarried materials supplier producing construction aggregates and premium quality building stone, as well as agricultural lime for soil improvement. Its aggregate products are typically used in infrastructure projects, with its unique Cotswolds Ironstone and Bath Stone used in specified high-end housing applications. The business currently consists of four quarries, three mines and two separate stone processing sites located across the Southwest, Oxfordshire, and Lincolnshire. Johnston has access to tonnes of freehold and leasehold reserves giving it an average life of over 40 years.

Find out More


Harries is the cornerstone for SigmaRoc’s Welsh platform. Following the Group taking 100% ownership in September 2020, we have a significant footprint in the region with opportunities to expand the businesses organically and acquisitively.

Harries is one of Wales largest independent suppliers of aggregates. Based in West Wales, it operates out of six granite and limestone quarries; incorporating three asphalt plants, eight concrete plants, and a wharf operation, as well as a civil engineering division delivering significant infrastructure projects.

Harries now forms part of the North West region and is therefore overseen by Michael Roddy, who is also acting as interim MD to the platform. Following the award of the SWTRA contract and in preparation for tendering of the NMWTRA contract, the business has been restructured into two divisions:

1.     Construction Materials, which focuses on aggregate and ready-mix concrete and is led by Simon Lewis.

2.    Construction Services, which focuses on civil engineering, road surfacing, road construction and asphalt and is led by Nick Cleary. 

Find out More


PPG is a Platform of companies specialising in manufacturing precast concrete products. The platform includes:

Allen Concrete manufactures precast concrete products for the fencing and building industries with operations in Surrey and Northamptonshire.

Poundfield Precast is a leading manufacturer of precast concrete products. The company has been recognised as being “innovators in concrete”.

CCP Building Products is a supplier of concrete blocks and aggregates with 4 production facilities in the North West of England and North Wales.

RightCast are a leading precast company specialising in the design, manufacture, supply and installation of bespoke precast concrete products based in Yorkshire and serving customers nationally.

Find out More