Limestone is a soft, porous natural stone that’s highly absorbent and sensitive to harsh cleaning methods. Over time, it can darken, stain, or develop algae and mould, especially in shaded or damp outdoor areas. Unlike concrete or brick, limestone requires a gentle but effective cleaning process to restore its appearance without causing etching or surface damage.
Professional limestone cleaning involves using a low-pressure washing method (often called soft washing) paired with a pH-neutral, stone-safe cleaning solution. This breaks down organic growth and surface grime without damaging the stone. High-pressure water is never used directly on limestone, as it can cause pitting and erosion.
If high-pressure cleaning is used incorrectly, it will absolutely damage limestone stripping away the top layer, causing surface etching or even cracking. That’s why we use a low-pressure system specifically designed for delicate surfaces. Our process safely removes dirt, mould, and stains while protecting the integrity of your limestone.
Our professional limestone cleaning service is suitable for a wide range of surfaces, including:
Whether the limestone is sealed or unsealed, we tailor our approach to suit the specific surface and its condition.
Yes. Mould and algae are common problems on limestone, especially in shaded or moist areas. Our soft wash system includes an antimicrobial treatment that kills off the spores and lifts the black and green staining from the surface. For long-term prevention, we recommend sealing the limestone after cleaning.
We highly recommend sealing your limestone after it’s been cleaned. Because limestone is porous, it easily absorbs moisture and stains. Sealing helps protect it from mould regrowth, UV damage, and everyday wear. It also makes future cleans much easier and helps maintain the stone’s natural colour.
For most residential properties, once every 12–18 months is ideal to keep limestone surfaces looking their best. If your property is exposed to heavy shade, moisture, or traffic (or you live near the coast) you might benefit from more frequent cleaning and maintenance.
Time between cleans can be drastically reduced if you decide to go ahead with limestone sealing – it saves you money long-term on cleaning and protect your limestone from the elements for 5-7 years.
We offer a higher standard of pressure cleaning services in Perth at competitive prices.
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