How to Clean Algae from Your Patio in the Algarve

Why Algae Thrives on Algarve Patios

The Algarve enjoys over 300 days of sunshine per year, but the combination of warm temperatures and coastal humidity creates perfect conditions for algae and moss growth on outdoor surfaces. Patios, pool surrounds, and walkways are particularly vulnerable — especially those in partly shaded areas or near water features.

Green algae can appear within weeks of cleaning if not treated properly, making surfaces dangerously slippery and visually unappealing. The porous nature of common Algarve paving materials like limestone, terracotta tiles, and concrete means algae can embed itself deep into the surface.

DIY vs Professional Pressure Washing

While consumer pressure washers are available from hardware stores in the Algarve, they often lack the power needed to remove deep-set algae. More importantly, using incorrect pressure or technique can damage delicate surfaces like natural stone or painted tiles.

Professional pressure washing services use commercial-grade equipment with adjustable pressure settings, combined with biodegradable pre-treatment solutions that kill algae at the root. This means the clean lasts significantly longer — typically 6-12 months in the Algarve climate compared to just a few weeks with DIY methods.

Our Recommended Approach

At Whitehouse Services, we follow a proven four-step process for patio cleaning in the Algarve:

1. Assessment: We identify the surface type and level of algae growth to determine the right pressure and cleaning solution.
2. Pre-treatment: A biodegradable anti-algae solution is applied and left to work for 15-20 minutes.
3. Pressure washing: Using commercial equipment, we systematically clean the entire patio at the correct pressure for your specific surface.
4. Final rinse and inspection: We ensure every area is spotless and the runoff is properly managed.

How Often Should You Clean?

For most Algarve properties, we recommend professional patio cleaning once or twice a year. Spring (March-April) is ideal for preparing your outdoor space for summer, while autumn (October-November) removes summer buildup before the wetter months. Properties near the coast or in shaded areas may benefit from quarterly cleaning.