Stone Retaining Wall & Staircase Restoration
Heavy mould, algae and years of built-up grime completely transformed with professional soft washing and pressure cleaning. The natural stone colour and texture was fully restored without any damage to the stonework.
Before & After
What We Did
Pre-treatment
Applied a biodegradable biocide to kill mould and algae at the root, preventing rapid regrowth and ensuring a long-lasting clean.
Soft washing
Low-pressure application of a specialist cleaning solution to break down the organic matter without blasting or eroding the stone surface.
Pressure rinse
Controlled pressure wash to remove all residue and reveal the natural stone colour beneath — no damage to the surface or mortar joints.
The Result
The natural colour and texture of the stone was fully restored. No damage to mortar joints, no surface etching — just clean stone that looks as it should.
The biocide treatment inhibits regrowth for 12+ months under normal conditions.
Suitable For
If your stone surfaces have gone dark from mould or algae, it's almost certainly cleanable — get in touch for a free assessment.
This stone retaining wall and staircase had accumulated years of mould, algae, and biological growth that had turned the natural stone almost entirely black. The client had tried domestic cleaning products without success before calling us in.
Our soft-wash method is the right approach for porous stone surfaces like this — high-pressure cleaning would have damaged the stone face and eroded the mortar joints. The gentler chemical-led approach removes organic staining without harming the structure underneath. The result speaks for itself.
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