Written by Chris Earley
Founder, Perth Eco Clean
Chris Earley founded Perth Eco Clean in 2018 to give Perth homes and businesses a genuinely eco-friendly alternative to conventional cleaning. He holds multiple industry certifications including BSCAA and RapidClean accreditations across office cleaning, carpet cleaning, chemical handling, and infectious cleaning in commercial settings.
Key Takeaways
- Limestone is a beautiful but porous natural stone that requires special care, especially in Perth’s outdoor climate.
- Acidic cleaners, bleach, or high-pressure washing can permanently damage limestone.
- The safest way to clean limestone is with gentle, pH-neutral, eco-friendly solutions and regular maintenance.
Limestone is one of Perth’s most popular building materials, prized for its natural beauty, durability, and timeless appeal. From garden walls and outdoor paving to pool surrounds and indoor flooring, it gives properties a warm and elegant finish.
However, WA’s coastal air, red dust, and rainy winters can take a toll on limestone. Its porous surface means it absorbs stains easily, while harsh cleaning methods can cause permanent damage. Many homeowners unknowingly erode their limestone with acidic cleaners or high-pressure washing, leading to costly repairs.
This guide explains how to clean limestone properly, the mistakes to avoid, and why eco-friendly limestone cleaning is essential for protecting your stone.
Why Cleaning Limestone Properly Matters
Limestone is a calcium-based natural stone, which makes it both beautiful and delicate. Its porous nature allows liquids, dirt, and debris to seep in quickly, leading to stains and discolouration.
When cleaned incorrectly, limestone is at risk of:
- Etching from acidic products such as vinegar, bleach, or citrus-based cleaners.
- Erosion from high-pressure cleaning, which strips away the stone’s surface.
- Mould and staining from moisture trapped in unsealed surfaces.
Eco-friendly, pH-neutral limestone cleaning methods are the safest way to maintain limestone without harming the environment or your family.
Common Limestone Cleaning Mistakes in Perth
Many Perth homeowners and businesses unintentionally damage limestone by:
- Using vinegar, bleach, or acidic cleaners. These corrode the stone and leave permanent marks.
- Applying high-pressure cleaning, unless limestone is properly sealed, pressure washing can erode the surface and worsen porosity.
- Neglecting red dust, leaves, and moisture, WA’s iron-rich soils and coastal climate mean staining and mould can develop quickly if limestone is not maintained.
Step-by-Step Guide: How to Clean Limestone Properly
1. Regular Sweeping and Dusting
- Sweep floors and outdoor areas weekly to remove dirt, red dust, and leaves.
- Use a soft-bristle broom or microfibre mop to avoid scratching.
2. Use Eco-Friendly pH-Neutral Cleaners
- Avoid acidic or harsh chemicals.
- Opt for eco-friendly, pH-neutral cleaners specifically designed for natural stone.
- Dilute according to instructions for safe use indoors and outdoors.
3. Cleaning Limestone Floors and Walls
- Lightly mop limestone floors with a damp mop, not soaking wet.
- Wipe walls and vertical surfaces with a soft cloth or sponge.
- Rinse with clean water to prevent residue build-up.
4. Outdoor Limestone Care
- Rinse outdoor pavers and pool surrounds with a garden hose rather than high-pressure equipment.
- Pay extra attention to shaded areas where mould or algae may grow.
5. Drying to Prevent Watermarks and Mould
- Always dry limestone surfaces with a clean towel or mop after washing.
- This prevents water spots, mould, and efflorescence (white salt deposits).
How to Remove Stains from Limestone
Oil Stains (BBQ and Outdoor Areas)
- Blot oil spills immediately with a soft cloth.
- Apply a natural stone poultice or a paste of bicarbonate of soda and water.
- Let it sit, then rinse gently with water.
Organic Stains (Leaves, Algae, Mould)
- Gently scrub with a pH-neutral stone cleaner and soft brush.
- For stubborn growth, contact a professional to avoid damaging the surface.
Salt Stains (Pools & Coastal Homes)
- Wipe with clean water and dry immediately.
- Persistent salt deposits may require professional limestone cleaning to restore the surface.
Sealing Limestone for Long-Term Protection
Sealing is one of the most effective ways to protect limestone from Perth’s climate.
- Sealing matters as it creates a barrier against water, oils, and stains while preserving the stone’s natural look.
- Outdoor limestone should be re-sealed every 1–2 years due to exposure to weather and pool chemicals.
- Indoor limestone should be resealed every 2–3 years depending on usage.
If you’re looking for an eco-friendly options, choose water-based, non-toxic sealants for sustainable stone protection.
Why Choose Professional Limestone Cleaning in Perth
While regular care can keep limestone looking its best, professional cleaning ensures deeper, long-lasting protection. Perth Eco Clean offers:
- Eco-friendly, non-toxic cleaning solutions safe for families, pets, and the environment.
- Expertise in Perth limestone and its unique challenges, from red dust to coastal salt damage.
- Time-saving and cost-effective services that prevent damage and extend the life of your stone.
Whether for a one-off restoration or scheduled maintenance, Perth Eco Clean is your trusted partner in limestone care.
Final Thought
Limestone is a stunning feature of many Perth properties, but it requires the right care to remain beautiful. Avoid acidic cleaners and high-pressure washing, stick to pH-neutral eco-friendly solutions, and reseal regularly to protect against Perth’s climate.
For stubborn stains or professional results, trust Perth Eco Clean to restore and maintain your limestone safely.
Contact Perth Eco Clean today to book professional limestone cleaning services in Perth.
FAQs
What’s the safest way to clean limestone in Perth?
Use a pH-neutral, eco-friendly cleaner with a soft mop or cloth. Avoid acidic products and high-pressure washing.
Can high-pressure cleaning damage limestone?
Yes. High-pressure water can erode the surface, making limestone more porous and vulnerable to damage.
How do you remove red dust stains from limestone?
Sweep regularly, then clean with a pH-neutral solution. For stubborn stains, a professional limestone cleaning service is recommended.
Is sealing limestone necessary in Perth’s climate?
Yes. Sealing protects against rain, red dust, salt, and moisture, all common in Perth conditions.
What eco-friendly cleaners are safe for limestone?
Use pH-neutral, biodegradable cleaners designed for natural stone. Perth Eco Clean uses only eco-friendly, non-toxic products.
How often should limestone be professionally cleaned?
Every 12–18 months is ideal for most Perth homes, or more frequently in high-traffic outdoor areas.