Flat Roofing We are approved installers of Icopal, Index and Pluvitec high performance SBS elastomeric bitumen based membranes. These are torch bonded or self adhesive systems , which eliminates the use of a boiler and reduces the use of heat by 85%. Specifiers can prefer traditional membranes and we can offer 10,15 and 20 year guarantees on all systems on new build and refurbishment.