Services to buildings and landscape activities Standard Industrial Classification (SIC) codes of UK-based importers and exporters 81100 - Combined facilities support activities (11412) 81210 - General cleaning of buildings (33805) 81221 - Window cleaning services (6968) 81222 - Specialised cleaning services (18488) 81223 - Furnace and chimney cleaning services (546) 81229 - Other building and industrial cleaning activities (7947) 81291 - Disinfecting and exterminating services (1523) 81299 - Other cleaning services (27464) 81300 - Landscape service activities (28491)