81.21 - General cleaning of buildings
This class includes: - general (non-specialized) cleaning of all types of buildings, such as: . offices . houses or apartments . factories . shops . institutions - general (non-specialized) cleaning of other business and professional premises and multiunit residential buildings These activities are mostly interior cleaning although they may include the cleaning of associated exterior areas such as windows or passageways.
This class excludes: - specialised cleaning activities, such as window cleaning, chimney cleaning, cleaning of fireplaces, stoves, furnaces, incinerators, boilers, ventilation ducts, exhaust units, see 81.22