SIG plc is a British-based international supplier of specialist insulation, roofing, commercial interiors, and sustainable building products. Founded in 1957 as Sheffield Insulations Limited in Sheffield, it evolved through rapid expansion, renaming to SIG plc in 1995 after listing on the London Stock Exchange in 1989. The company distributes essential materials across Europe and the Middle East, serving building, construction, off-site manufacturing, and process sectors with segments including UK Roofing, UK Interiors, Germany, France Roofing, Poland, Benelux, Ireland, and specialist markets. Notable features encompass a workforce of approximately 6,600 employees, operations from its headquarters at Adsetts House in Sheffield Business Park, and a focus on innovative solutions like fire-rated roofing systems, waterproofing, and high-temperature insulation. SIG plc supports diverse projects through subsidiaries such as SIG Trading Ltd. for roofing design and SIG France SAS for insulation and exteriors, playing a key role in the construction supplies and fixtures wholesale sector by providing impartial design, specification, and supply services.