About Us

The Leadweight company is a Division of Calder.  With over 260 years’ experience, Calder Industrial Materials is the UK’s leading manufacturer and supplier of lead products to the Roofing, Healthcare, Aerospace, Defence, Industrial, Marine, Oil & Gas, Security and Research markets.

Based in the UK but servicing customers throughout the globe, Calder provide mission critical solutions with a commitment to reliability, quality and service.

We are a member of Calder Group, who are Europe’s largest producer of lead sheet and lead-based engineered products. With operating subsidiaries in Germany, France, Netherlands, Ireland and UK.