Project Transformation
A natural stone patio in Marlow showing heavy moss growth and widespread black spot, cleaned back to the stone and protected with Chiltern EverGuard™.
BeforeAfterAbout the project
On this project, the patio was showing significant moss growth, widespread black spot and years of built-up contamination. We always begin with a full inspection to assess the condition of the surface and determine the safest and most effective restoration process.
Black spot is one of the most stubborn forms of organic staining found on natural stone. Before cleaning begins, we identify the extent of the contamination so the correct treatment can be used to break it down safely and effectively. Using specialist treatments and professional surface cleaning equipment, we remove moss, dirt, black spot and other organic contamination from the patio, restoring the surface without causing unnecessary damage to the stone. Once the patio is fully cleaned, we apply Chiltern EverGuard™. The treatment penetrates into the substrate of the stone, killing organic spores below the surface while providing 12–24 months of protection against algae, moss, lichens and black spot regrowth. With the cleaning complete, the natural colour and texture of the stone are revealed once again. Fine detail, colour variation and the original finish are restored, leaving the surface clean, vibrant and protected.
The completed patio has been transformed from a heavily contaminated surface into a clean, bright outdoor space. With long-lasting protection now in place, it will continue to improve over the coming weeks and remain cleaner for longer.
Surface
Natural Sandstone
Location
Project Type
Step by step
Every project follows a careful, surface-specific process — here’s exactly how we approached this one.
On this project, the patio was showing significant moss growth, widespread black spot and years of built-up contamination. We always begin with a full inspection to assess the condition of the surface and determine the safest and most effective restoration process.
Black spot is one of the most stubborn forms of organic staining found on natural stone. Before cleaning begins, we identify the extent of the contamination so the correct treatment can be used to break it down safely and effectively.
Using specialist treatments and professional surface cleaning equipment, we remove moss, dirt, black spot and other organic contamination from the patio, restoring the surface without causing unnecessary damage to the stone.
Once the patio is fully cleaned, we apply Chiltern EverGuard™. The treatment penetrates into the substrate of the stone, killing organic spores below the surface while providing 12–24 months of protection against algae, moss, lichens and black spot regrowth.
With the cleaning complete, the natural colour and texture of the stone are revealed once again. Fine detail, colour variation and the original finish are restored, leaving the surface clean, vibrant and protected.
The completed patio has been transformed from a heavily contaminated surface into a clean, bright outdoor space. With long-lasting protection now in place, it will continue to improve over the coming weeks and remain cleaner for longer.
A large entertaining terrace in Henley-on-Thames that had greyed off and gone slippery. Restored with a controlled chemical treatment rather than brute pressure, because the stone would not have survived the alternative.
This bespoke sandstone garden pathway had become heavily weathered with organic staining, darkened gravel, embedded contamination and surface discolouration throughout.
Before cleaning began, the patio was cleared to provide safe and unobstructed access to the complete surface. The surrounding areas were assessed and prepared so that the cleaning process could be carried out methodically while protecting nearby plants, lawns, fencing and other
We'll assess your surfaces and recommend the right approach — no pressure, no obligation.
