Packing, stopping and insulating materials; boards, sheets and films of polymers and foils and laminates comprising combinations of these materials for insulating, weatherproofing, packing, lining and stopping; films, sheets and laminates comprising polymers, foils or papers or combinations of these, optionally reinforced with fibres, or like materials, used within walls, floors or ceilings of buildings and houses for the purposes of insulation, lining or weatherproofing; foils, films and insulating materials for lagging; sheets, films, laminates and tapes for masking, backing, underlay and surface protection; none of the foregoing goods being or containing sisal