The frequency of professional rope access window cleaning depends on various factors, including the location and type of building, environmental conditions, and aesthetic preferences. Generally, high-rise buildings in areas with high levels of dust, pollution, or coastal exposure may require more frequent cleaning. However, as a general guideline, it is recommended to schedule professional window cleaning at least twice a year to maintain the cleanliness and appearance of the windows. Additionally, periodic inspections can help determine if more frequent cleaning is necessary based on the specific needs of your building. Consulting with a professional rope access window cleaning company in Doha, Qatar can provide you with tailored advice based on your building's characteristics and cleaning requirements.