KM Roofing Edinburgh flat roof specialists – Our roofers laying flat roof insulation boards on a property in Trinity, Edinburgh. The flat roof insulation boards are mechanically fixed to the exposed timber roof deck with screws and flat roof washers. The insulation boards are then covered with torch on high performance underlay and green mineral felt capping sheet with a 20 year warranty & AA fire rating. All roofing work by KM Roofing Edinburgh and 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).