Algae, lichens, liverworts and moss on hard surfaces like patios and block paving

Algae, lichens, and moss often thrive on patios and block paving surfaces. Despite common misconceptions, these growths don't inflict damage on the underlying structures but can render patios, drives, paths, and steps slippery, posing a safety concern.

The Issue with Lichens on Patios and Driveways:

Pathways and steps covered in algae-like growths, liverworts, lichens, and moss can pose a hazard due to slipperiness. Although the winter season typically witnesses significant algal, moss, and liverwort growth, accumulation can transpire during any damp period or in shaded, humid areas.

On stone and timber features, lichens and moss contribute to an aesthetically pleasing and mature appearance in the garden. Importantly, these growths don't inflict harm on the surfaces they adorn; rather, they constitute a natural facet of the garden ecosystem.

Appearance of Various Growth Types:

Algae and algae-like growths: Recognizable by a green film or powdery deposit, algae commonly appear on block paving, stonework, and garden furniture. The dark green or blackish jelly-like growths observed in damper, cooler weather on paths and tarmac areas are often mislabeled as blue-green or gelatinous algae but are, in fact, a cyanobacteria called Nostoc.

Lichen: Frequently found on block paving and timber structures like garden benches and decking, lichen exhibits various colors depending on the species—silver-grey, grey-green, yellow, or orange. Lichens can manifest as crust-like, leafy, or scurfy in texture.

Liverwort: On hard surfaces, liverworts typically present a green, flattened, plate-like body devoid of leaves. Marchantia, a common example, often features umbrella-like structures carrying sexual organs.

Moss: Mosses found on hard surfaces typically exhibit a cushion-like appearance.

The Origin of Lichen Growth on Patios and Driveways

Algae, lichens, liverworts, and moss thrive in damp environments, relying on moisture for growth and reproduction. While lichens are commonly found in areas with clean air, their slow growth distinguishes them from the faster-spreading moss and algae. Typically, these growths appear in sheltered spaces beneath overhanging plants, flourishing in poorly drained or shady conditions.

Understanding and Managing Lichen Growth on Outdoor Surfaces

In instances where the presence of algae, moss, lichens, and liverworts poses no threat, such as on stone sculptures and features, embracing their existence is encouraged. These growths not only contribute to the mature aesthetic of a garden but also seamlessly blend with stonework, enhancing the garden's biodiversity. In rural settings, gardens may even host rare lichen species.

The Royal Horticultural Society (RHS) advocates for proactive control measures against pests, diseases, and weeds through effective cultivation practices, careful cultivar selection, garden cleanliness, and the promotion of natural enemies. Chemical interventions, if necessary, should be applied sparingly and with precision.

Control Measures for Slippery and Weathered Surfaces

Cultural Control:

• Use a sharp knife or a block paving brush with wire bristles to dislodge moss between paving stones.
• Safely utilize a pressure washer for efficient removal of moss, black spot and algae, especially on wooden garden features. Follow up by treating fences, sheds, and furniture with appropriate preservatives.

Regular Maintenance:

• Employ a stiff broom for routine brushing of hard surfaces to deter growth.
• Rake loose surfaces like gravel to prevent moss and weed development.
• Prune overhanging plants to improve air circulation, allowing sunlight and wind to facilitate drying.
• Ensure surfaces have a slight slope to prevent standing water.

Drainage Improvement:

• Dig shallow channels along path edges, patios, and drives, filling them with coarse gravel to absorb runoff water.
• Fork over beds near damp surfaces to enhance drainage and water absorption.

Paving Considerations:

• Limit paved areas to essential access points.
• Opt for permeable paving for new hard surfaces.
• Keep drains clear of debris to maintain effective water drainage.

Anti-Slip Solutions:

• Choose surface finishes designed for grip in wet conditions, particularly in shady spots.
• Secure chicken wire on wooden surfaces to reduce slipperiness.
• Apply coarse sand on garden steps for a straightforward anti-slip solution.Weedkiller control

Algae, lichens, and liverworts can be removed with most proprietary patio cleaners. Moss can be controlled with products approved for use on hard surfaces. Most products are non-persistent and repeat applications will be required.

Efficient Solutions with Hedon Exterior Cleaning Services

For comprehensive removal of lichen, moss, and algae nuisances, Hedon Exterior Cleaning Services stands as a reliable solution. Our expert team employs advanced techniques, including soft washing and pressure washing services, to restore the pristine condition of outdoor surfaces.

Soft Washing Expertise:

Hedon Exterior Cleaning Services specialises in soft washing, a gentle yet highly effective method tailored to treat delicate surfaces. Utilising eco-friendly cleaning agents, we ensure the thorough elimination of lichen, moss, and algae without causing harm to your valuable outdoor features. This approach is particularly suitable for stone sculptures and intricate garden structures where preservation is crucial.

Precision Pressure Washing:

In cases where a more robust approach is required, our team utilises precision pressure washing service. This method is ideal for hard surfaces like driveways, patios, and wooden structures, efficiently eradicating persistent growths. By carefully adjusting pressure levels, we guarantee thorough cleaning without compromising the integrity of your surfaces.

Comprehensive Surface Treatment:

Hedon Exterior Cleaning Services goes beyond mere cleaning. We understand the importance of preserving your garden's aesthetics while addressing the issues at hand. Following the removal of lichen, moss, and algae, our experts can recommend protective measures, such as the application of specialised coatings or sealants, to deter future growth and extend the longevity of your outdoor spaces.

Environmentally Responsible Practices:

We are committed to environmentally responsible cleaning practices. Our cleaning solutions are biodegradable and designed to minimise ecological impact, ensuring a harmonious balance between effective cleaning and environmental consciousness.

Choose Hedon Exterior Cleaning Services for a tailored approach to lichen, moss, and algae removal. Our dedicated team combines expertise with cutting-edge technology to rejuvenate your outdoor spaces, leaving them looking pristine and well-maintained. Experience the difference with our professional exterior cleaning services.

For more information about Hedon Exterior Cleaning Services complete our online form to request a call back or call 01482 898 742 and speak to a member of our friendly team.