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21 October 2024
Cleaning Indian Sandstone: A Complete Guide to Maintaining and Restoring Your Patio
Whether it’s the warm, earthy tones or its ability to handle the unpredictable British weather, it’s easy to see why Indian sandstone paving is such a popular choice. However, like any outdoor surface, it needs regular care to keep looking its best.
Without proper maintenance, dirt, stains, and weathering can dull the natural stone paving’s charm. But don’t worry—keeping your sandstone paving in top shape doesn’t have to be complicated! In this guide, we’ll walk you through simple and effective methods for cleaning Indian sandstone, helping you maintain its beauty and ensure it remains a standout feature in your garden for years to come.
Best Cleaning Methods for Indian Sandstone
To keep your Indian sandstone paving in top shape, opt for cleaning solutions that are pH-neutral and non-acidic. These intensive cleaners are designed to lift dirt and grime without damaging the stone. For a thorough clean, we recommend using LTP Grimex once or twice a year, as it is specially formulated for natural stone surfaces.
How to Clean Indian Sandstone Without Damaging It
For a thorough yet gentle clean, follow these steps:
- Use LTP Grimex: Apply LTP Grimex according to the manufacturer’s instructions. This product is designed to break down dirt and stains effectively while being safe for your sandstone.
- Apply the Solution: Pour LTP Grimex over the sandstone paving, ensuring even coverage. The product will work to lift the dirt without harming the stone.
- Scrub the Surface: Use a nylon pad or stiff bristled brush to scrub the stone gently. Focus on the full area when using Grimex, but avoid using abrasive tools that could scratch the surface.
- Rinse Thoroughly: After allowing LTP Grimex to work its magic, rinse the sandstone with clean water to remove any residue and remaining dirt.
- Allow to Dry: Let the surface air-dry naturally to prevent water spots.
Is it OK to Power Wash Indian Sandstone?
While pressure washing can be effective for cleaning Indian sandstone paving slabs, we ultimately recommend avoiding this method, as it can cause damage to the stone. However, if you do choose to use a pressure washer, it’s essential to follow these careful steps to minimise any risk.
- Use LTP Grimex for Optimal Cleaning: Apply LTP Grimex to break down dirt and stains effectively. The pressure washer will then help remove the excess product and any debris that has been loosened. This combination ensures a thorough clean while protecting your sandstone.
- Choose the Right Pressure Setting: When using a pressure washer, opt for a low to medium pressure setting. High pressure can erode the sandstone surface, leading to damage. Typically, a pressure setting between 1,500 and 2,500 psi is suitable for sandstone.
- Use a Wide-Nozzle Tip: Attach a wide-angle nozzle to your pressure washer. A 25-degree or 40-degree nozzle is recommended, as it disperses the water over a larger area, reducing the risk of damage.
- Maintain Safe Distance: Keep the nozzle at a safe distance from the sandstone surface, ideally around 18-24 inches. This helps prevent direct high-pressure contact, which can cause chipping or etching.
- Test First: Before starting on the entire area, perform a test on a small, inconspicuous section of the sandstone. This helps you gauge the pressure and ensure that the washer doesn’t cause any damage.
- Work in Sections: Clean the paving in small sections to ensure even cleaning and avoid leaving streaks. Move the pressure washer in a sweeping motion, working from one end of the section to the other.
- Avoid Prolonged Water Exposure: Don’t linger too long in one spot with the pressure washer, as extended exposure to water can lead to issues like efflorescence. Move steadily and methodically to cover the surface evenly.
- Clean Up Properly: After pressure washing, rinse the area thoroughly with clean water to remove any residual dirt and cleaning solution. Allow the sandstone to dry completely before walking on it or replacing any furniture.
How to Remove Stains from an Indian Sandstone Patio
Stains on Indian sandstone can be persistent and challenging, but with the right techniques, you can effectively tackle them. Whether dealing with general stains or more stubborn marks, follow these steps to restore your paving’s appearance:
- Prepare a Cleaning Solution: For most stains, we recommend using LTP Grimex, a specially formulated, Ammonia based cleaner that has been lab-tested on all our products. Additionally, we offer more targeted solutions:
- LTP Blackspot and Algae Remover – a deep cleaning solution perfect for tackling blackspots and algae on garden patio paving and driveways containing no bleach.
- LTP Rust Stain Remover – a non-caustic solution ideal for removing rust stains caused by metal garden furniture, BBQs, and fire pits from exterior paving and flagstone tiles.
- LTP Ferrex Patio Cleaner & Rust Remover – An acid based cleaner for use on slate, sandstone and granite removes rust breakouts, cement, and mortar on natural stone and patio flagstones, suitable for both interior and exterior use.
- Apply the Solution: Apply the commercial cleaners directly to the stained area. Ensure the stain is thoroughly covered. Follow the manufacturer’s instructions if using a commercial product.
- Scrub the Stain: Use a soft-bristled brush or a non-abrasive scrubbing pad to gently work the solution into the stain. Scrub in a circular motion to lift the stain without scratching or damaging the sandstone.
- Rinse Thoroughly: After scrubbing, rinse the area with clean water to remove any residue from the cleaning solution. This step helps prevent potential damage from leftover agents. Each product above has various dwell times. Please read the label.
- Repeat if Necessary: For more stubborn stains, you may need to repeat the cleaning process. Ensure the sandstone is completely dry before applying additional treatments.
Does Bleach Damage Indian Sandstone?
We know what you’re thinking: does bleach damage Indian sandstone? No Bleach does not damage sandstone but bleach is known to be quite harsh on natural stone, which is why we recommend using LTP Grimex, an non bleach-based product that has been specially formulated and lab-tested for safe use on sandstone and other natural stones. Unlike household bleach, LTP Grimex is designed to effectively remove tough stains without causing damage. Here’s how to use it properly:
- Follow Instructions: Always follow the product guidelines to ensure safe and effective cleaning. LTP Grimex has been rigorously tested, so you can trust it for your sandstone.
- Test First: As with any cleaner, test LTP Grimex on a small, hidden area of the stone before applying it to a larger section. This helps ensure there’s no discoloration or surface damage.
- Avoid Prolonged Exposure: Do not leave the product on the surface longer than recommended. Rinse thoroughly to prevent any residue from lingering on the stone.
- Use When Necessary: For severe biological stains like algae or black spots, consider using LTP Blackspot and Algae Remover for a more targeted solution.
Essential Maintenance Tips for Indian Sandstone
Restoring the Colour of Indian Sandstone
Over time, Indian sandstone can lose its vibrant hue due to exposure to the elements, dirt, and general wear. Fortunately, you can effectively restore its original charm using LTP Colour Intensifier and Stainblock H20. This specially water-based formulated product not only enhances the rich colours of your sandstone paving but also provides strong protection against water, oil, and dirt. By using this sealer, you can ensure your outdoor space remains stunning and well-maintained. Here’s how you can bring back the lively colours of your sandstone paving with LTP Colour Intensifier.
- Prepare the Surface:
- Ensure the sandstone is completely clean, dry, and free from any dirt or contaminants using the cleaning steps above.
- Test First:
- Always test the sealer on an inconspicuous area before applying it to the entire surface. This ensures compatibility and desired results.
- Apply the Impregnating Sealer:
- Shake the bottle well before use. Apply generously and evenly with a foam roller, paint brush, sealant applicator, lint free cloth or sponge.
- For more absorbent surfaces, apply additional coats at hourly intervals until fully saturated. A light pressure sprayer can be used for application.
- Remove Excess Sealer:
- After the waiting period, use a clean, dry, fluff-free cloth to wipe off any excess sealer.
- Ensure the surface maintains a natural finish. Leaving excess sealer can cause an unsightly glossy appearance.
- For Enhanced Colour:
- If you want a stronger colour enhancement, or if your sandstone is more absorbent, you can apply additional coats.
- Note: Do not apply in direct sunlight or when temperatures exceed 25˚C or when temperatures are under 5˚C. Avoid application on floors with underfloor heating, as it may cause premature drying.
- Keep Surfaces Dry:
- After application, avoid getting the surfaces wet for a minimum of 3 days to ensure proper curing.
Sealing for Long-Term Protection
Whether you’ve just had a new sandstone patio installed or have finished restoring its colour, sealants are a great way to ensure long-term protection. Sealing offers several benefits:
- Protects Against Stains: A good sealer creates a protective barrier that helps prevent stains from penetrating the stone, making it easier to clean up spills and dirt before they can cause lasting damage.
- Enhances Colour: Many sealers have a colour-enhancing effect, which deepens and enriches the natural tones of your sandstone, giving it a more vibrant and polished look.
- Prevents Weathering: Sealing helps protect the stone from the effects of weathering, such as fading due to UV exposure or damage from rain and frost.
Choosing and Applying the Right Sealer
We recommend using Mattstone H20, a top-tier, water-based impregnating sealer specifically designed for exterior stone surfaces. It enhances the beauty of your stone without adding a glossy sheen and provides exceptional protection against water, oil, and grease.
Before sealing, always clean the surface with LTP Grimex to ensure optimal adhesion and effectiveness. Apply Mattstone H20 according to the manufacturer’s instructions, typically using a brush or roller. Ensure even coverage and allow it to dry thoroughly before using the area. It’s generally recommended to reapply the sealer every 1-2 years, depending on the level of wear and environmental factors.
By following these steps, you can effectively restore the colour of your Indian sandstone paving and keep it looking vibrant and beautiful for years to come. Regular maintenance, including periodic cleaning and resealing, will help preserve its natural beauty and extend its lifespan.
Whether you’re tackling stubborn stains, considering a power wash, or looking to restore and protect the colour of your sandstone, these tips will help you maintain its natural beauty and prolong its life. Remember, regular care not only enhances the appearance of your paving but also guards against wear and weathering.
By following these straightforward methods, you’ll ensure your Indian sandstone patio remains a striking and inviting feature for years to come. Embrace these cleaning and maintenance tips to enjoy a beautiful, vibrant outdoor space that truly stands the test of time.