Expert Reveals the «Most Effective Way» to Remove Algae from Terraces: It’s «Highly Efficient»
Most homeowners are likely to encounter a green patio at some point because it is affected by algae. Keeping the patio and paths clean is often overlooked compared to other tasks in the garden. It’s worth remembering that without proper care, green algae and moss can start to grow on terraces, stone walls, or fences. This can damage the appearance of the stone and pose a risk of slippery roads, which can be quite dangerous.
The Problem with Algae
Algae tends to be more prominent on uneven and soft surfaces rather than flat and hard surfaces. Late fall through winter is traditionally the time when algae and moss are most prominent, but buildup can happen during any wet period or in shady, damp areas. Monty Don, a gardening expert, shared his insights with the Express on the importance of keeping these areas clean.
Why It’s Important
Monty Don argued that the main reason to remove algae on paths and patios is because it can be “dangerous.” “At this time of year, brick and tile paths can be very slippery and dangerous. This is due to algae growing on the surface – especially if it’s wet and shady. And at this time of year, they can be wet and slippery for months,” he explained.
The Best Method
To reduce slipperiness, Monty Don claimed that the ‘best way’ is to wash off the algae with a pressure washer, which can be rented if you don’t own one. Using a pressure washer can remove algae from patios, but it can also remove sand in the joints. This sand protects and extends the life of your tiles, so if you plan to use a pressure washer, be careful not to hit the grout. However, it’s not a problem if it does happen. Once the algae has been removed, sand can be used to repair the joints and prevent regrowth, as this will block the spaces between the stones.
Practical Tips
“Once this is done, sand is swept into the joints. If the path is tiled or stone, the porous surface will absorb some of the sand. A quicker – but still quite laborious – alternative is to simply work the sand in with a stiff brush without washing,” Monty Don said. The expert explained that this is a “very effective way” to clean a terrace and make a path safe “without resorting to chemicals.”
