Clean, sparkling windows don’t just make your property look better — they let in more natural light, improve air quality, and boost overall wellbeing. But how often should you really clean them? The answer depends on a few key factors: your location, type of property, and exposure to the elements.
1. Residential Properties
For most homes, professional window cleaning every three to four months keeps glass clear and frames in good condition.
However, if your house is near the sea (like many in Lisbon and the coastal areas), salt and humidity can leave streaks and corrosion faster — meaning a bi-monthly cleaning may be better.
Pro tip: Regular maintenance helps prevent mineral build-up and costly glass replacement later on.
2. Commercial Buildings
Businesses should think of window cleaning as part of their brand image. Office windows collect dust, rain marks, and pollution that dull the building’s appearance — and that affects how clients and employees perceive your company.
Street-level shops or restaurants: Every 2–4 weeks, since fingerprints and pollution are constant.
Office buildings: Every 1–2 months, depending on local traffic and weather.
High-rise buildings: Every quarter, coordinated with safety and access schedules.
Remember: Clean windows signal professionalism and attention to detail — the same qualities your business wants to project.
3. Industrial or Construction Environments
If your property is near construction zones or industrial areas, dust and grime build up rapidly. Scheduling monthly cleaning avoids permanent staining and maintains clear visibility.
4. Environmental Factors to Consider
Several local conditions can influence how often you need to clean your windows:
Coastal air: Salt deposits and humidity accelerate corrosion.
Traffic & pollution: Urban areas accumulate grime faster.
Seasonal weather: After storms or heavy rain, streaks and mineral residues can appear.
Flexible Details tailors its cleaning schedules to your environment — ensuring you get the best balance between cost, efficiency, and lasting shine.
5. The Bottom Line
There’s no one-size-fits-all schedule. For most homes, cleaning every 3 months works well. For businesses, plan on monthly or bi-monthly service.
Consistent cleaning doesn’t just keep your glass spotless — it protects your investment, improves natural lighting, and enhances your property’s image.
✨ Need a Shine That Lasts?
Flexible Details provides professional window cleaning in Lisbon and across Portugal, using safe, eco-friendly products and expert techniques for every surface type.
👉 Contact us today for a free quote or a custom cleaning schedule that fits your property and budget.