Services to buildings and landscape activities Standard Industrial Classification (SIC) codes of UK-based importers and exporters 81100 - Combined facilities support activities (11954) 81210 - General cleaning of buildings (36221) 81221 - Window cleaning services (7331) 81222 - Specialised cleaning services (19760) 81223 - Furnace and chimney cleaning services (565) 81229 - Other building and industrial cleaning activities (8555) 81291 - Disinfecting and exterminating services (1624) 81299 - Other cleaning services (29272) 81300 - Landscape service activities (29694)