A Specialist Quarried Materials Group

We invest in high quality quarries that allow us to extract low and high grade materials for use in construction, agriculture, environmental and industrial applications.

Channel Islands Platform

The Ronez opperations supply the Channel Islands with aggregates, ready-mixed concrete, asphalt and precast concrete products.

Precast Products Group

PPG is a Platform of companies specialising in manufacturing concrete blocks, precast products, as well as fencing solutions.

Dimension Stone Platform

Carrières du Hainaut (CDH) is the cornerstone of our Dimension Stoneplatform. It specialises in belgian blue limestone unique to the region.

Benelux Platform

Our benelux-wide aggregates and concrete platform which includes Granulats du Hainaut, B-Mix Beton and Cuvelier, producing over 250000 m3 of concrete.


With over 820 employees and a rich history spanning over a century, the Nordkalk platform consists of more than 30 locations across 10 countries.


RightCast Ltd RightCast Ltd We are pleased to welcome the RightCast team into SigmaRoc’s Precast