SIG plc (LSE: SHI) is a British-based international supplier of insulation, roofing, commercial interiors and specialist construction products.
It is listed on the London Stock Exchange and is a constituent of the FTSE 250 Index.
The Company was founded by Ernest Adsetts in 1957 in Sheffield as Sheffield Insulations Limited. His son Norman Adsetts joined the firm in 1966 becoming Managing Director in 1970 and then Chairman in 1985. The Company was first listed on the London Stock Exchange in 1989 when it became Sheffield Insulations Group plc.