Roofing and Roofers in Glasgow, Scotland. At GHC Roofing in Glasgow our roofers specialise in new tiled roofs, roofing repairs, slate roofs, roof-lights, guttering and re-tiling of all roofs in the Glasgow area or elsewhere in Scotland. We have successfully served our customers since 1993 and through our quality of work we have built up an enviable reputation for quality and expertise, which we are continually striving to improve