Ensure that surface of outer pipe is clean and free of dust etc. Cut insulation to suit either bends or straight lengths. Wrap insulation in place and ensure no gaps and that butt joins are well sealed. For straight lengths use a minimum 50mm overlap. Use foil face self-adhesive tape ensuring that surface to be taped is clean and dust free. On straight runs, foil tape, cable ties, or packaging strapping should be used as a band approximately every 400-500mm wrapped around the insulation. All longitudinal joins to be overlapped and taped. Joins should be facing downwards to avoid unnecessary weight and strain on the tape. Important to ensure there are absolutely no gaps.