KM Roofing Edinburgh, Roofers Edinburgh, flat roof contractors. A completed insulated flat roof in Edinburgh by our roofers. This picture shows feltwork details with a lead flashing raggled into a sandstone chimney stack/gable end. The lead flashing is sealed with a polysulphide lead mastic. All roofing work by KM Roofing Edinburgh & all flat roofing materials supplied by Polyglass UK. KM Roofing Edinburgh are members of the National Federation of Roofing Contractors- NFRC, and Flat Roofing Alliance (FRA).