5 Signs Your Driveway or Patio Needs Pressure Washing

Over time, driveways and patios in the South London and Surrey area collect grime, moss and algae — especially in shaded or north-facing areas where surfaces stay damp longer.

Here's how to tell it's time for a clean:

1. Green or black patches appearing on block paving or slabs — usually algae or moss.
2. The surface feels slippery, especially when wet — a safety risk for family and visitors.
3. Grout lines between paving blocks are disappearing under weeds or grime.
4. The overall colour looks dull compared to when it was laid.
5. It's been more than 12–18 months since the last clean.

Left untreated, moss and algae can cause permanent staining and even loosen paving over time.

British Property Maintenance offers professional pressure washing for driveways, patios and decking across Croydon, South London and Surrey from £70. Message us with a photo for a fast estimate.