Services to buildings and landscape activities Standard Industrial Classification (SIC) codes of UK-based importers and exporters 81100 - Combined facilities support activities (11680) 81210 - General cleaning of buildings (34982) 81221 - Window cleaning services (7134) 81222 - Specialised cleaning services (19116) 81223 - Furnace and chimney cleaning services (554) 81229 - Other building and industrial cleaning activities (8229) 81291 - Disinfecting and exterminating services (1567) 81299 - Other cleaning services (28343) 81300 - Landscape service activities (29047)