Can You Use Bleach on Bluestone?

Many homeowners turn to bleach for tough cleaning jobs, but using it on bluestone surfaces can be risky.

Bleach is known for its powerful disinfecting properties, yet its harsh chemical composition can cause discolouration and damage to bluestone, potentially leading to costly repairs or replacements.

Fortunately, there are safer and equally effective alternatives to maintain the pristine condition of your bluestone. This article explores these alternatives, ensuring your bluestone remains beautiful without the risks associated with harsh chemicals.

Can You Use Bleach on Bluestone?

Using bleach on bluestone is not recommended as it can cause discolouration and damage the stone’s surface. Instead, opt for milder, pH-neutral cleaners designed for stone care to avoid harming your bluestone while keeping it clean and well-maintained.

Properties of Bluestone

Bluestone is a versatile and durable natural stone, commonly used in outdoor and indoor applications like patios, walkways, and architectural features. It primarily comprises sand-sized minerals or rock grains, most widely feldspathic sandstone.

This composition gives bluestone its notable strength and weather resistance, making it suitable for various climates and heavy usage.

Depending on the depth and location of the quarry, bluestone ranges in colour from deep blues to earthy greens, greys, and even purples.

The stone’s unique colouration is due to iron and other mineral compounds, which can also contribute to its susceptibility to discolouration when exposed to certain chemicals.

Bluestone is also known for its thermal stability, meaning it doesn’t easily crack under temperature changes, which is particularly valuable in areas with fluctuating climates. Its natural texture provides a non-slip surface, making it an ideal choice for pool surrounds and outdoor areas.

Bluestone’s density and hardness make it relatively low-maintenance; however, it is porous, which means it can absorb liquids and potentially stain if not properly sealed.

Sealing bluestone can help prevent staining and extend its life and beauty. Regular maintenance and the use of appropriate cleaning agents are crucial for preserving bluestone’s aesthetic and structural integrity.

The Impact of Bleach on Bluestone

Due to bluestone’s natural composition and porosity, using bleach can have detrimental effects. Bleach, a highly alkaline and aggressive chemical, can break down the sealant applied to bluestone surfaces.

This degradation exposes the porous stone to more dirt and moisture, which can lead to staining and increased wear.

Additionally, the harsh nature of bleach can cause a chemical reaction with the iron compounds in bluestone. This reaction may lead to discolouration, most commonly resulting in orange or rust-coloured stains that are difficult to remove and detract from the stone’s natural beauty.

Prolonged use of bleach can also alter the surface texture of bluestone, leading to a rougher feel that may compromise the stone’s non-slip properties.

For these reasons, avoiding bleach and using pH-neutral cleaners specifically formulated on natural stone is advisable. These cleaners effectively maintain bluestone’s integrity without risking damage.

If heavy staining occurs, products designed to tackle specific stains on natural stone should be used, following the manufacturer’s guidelines to prevent damage.

Alternatives to Bleach for Cleaning Bluestone

When cleaning bluestone, opting for alternatives to bleach is crucial to preserve the stone’s integrity and appearance. Here are effective and safer alternatives:

• pH-Neutral Cleaners: These are specially formulated for natural stone and are gentle enough not to harm the bluestone while effectively cleaning it. They help maintain the stone’s natural pH balance, preventing potential damage.
• Mild Dish Soap and Water: For routine cleaning, a simple solution of mild dish soap mixed with water can be used. Use a soft brush or mop to apply the solution gently, avoiding abrasive tools that could scratch the stone.
• Hydrogen Peroxide: For organic stains, such as those from leaves or food, hydrogen peroxide can be a safe alternative. It has bleaching properties without the harshness of chlorine bleach and is effective in removing stains when applied directly to the affected area.
• Vinegar Solution: Diluted vinegar (one part vinegar to five parts water) can be effective for removing mineral deposits like calcium and lime. However, it should be used sparingly, as acidic solutions can etch bluestone over time.
• Commercial Stone Cleaners: Many commercial products are available designed specifically for natural stone. These products provide a safe and effective way to tackle tougher stains without damaging bluestone.

Step-by-Step Guide to Cleaning Bluestone

Cleaning bluestone properly preserves its durability and aesthetic appeal. Follow this step-by-step guide for effective results:

1. Remove Debris: Start by sweeping or vacuuming the bluestone surface to remove loose dirt, leaves, and other debris. This prevents scratching the stone during the wet cleaning process.
2. Prepare Cleaning Solution: Mix a pH-neutral cleaner with water as directed on the cleaner’s label. For light cleaning, a mild dish soap solution (a few drops of soap in a bucket of water) can also be used.
3. Apply the Solution: Using a soft mop or cloth, apply the cleaning solution to the bluestone. Avoid pouring the solution directly onto the stone to prevent excess moisture from seeping into the pores.
4. Scrub Gently: For areas with more significant soiling, use a soft-bristled brush to scrub the surface gently. Do not use wire brushes or abrasive scrubbers, as these can scratch and damage the stone.
5. Rinse Thoroughly: After scrubbing, rinse the stone thoroughly with clean water to remove any soap residue. Excess cleaner can attract dirt and may lead to surface degradation over time.
6. Dry the Surface: Use a clean mop or towels to dry the surface. This helps prevent water spots and potential slip hazards.
7. Inspect and Repeat if Necessary: Check the stone for any remaining stains. For stubborn stains, a specialised stone cleaner may be required. Repeat the cleaning process if necessary.

What to Avoid When Cleaning Bluestone

When cleaning bluestone, it’s crucial to avoid practices and products that could damage the stone or compromise its appearance:

• Harsh Chemicals: Avoid using bleach, ammonia, or acid-based cleaners, including vinegar, unless diluted and used sparingly. These substances can etch the surface of the bluestone, leading to discolouration and pitting.
• High-Pressure Washing: While pressure washing can be tempting for removing tough stains, high pressure can erode the bluestone surface, making it more susceptible to wear and staining. If pressure washing is necessary, use a low setting and hold the nozzle at least 12 inches from the surface.
• Abrasive Tools: Do not use wire brushes, steel wool, or abrasive scrub pads. These can scratch the surface of the bluestone, leaving it vulnerable to further damage and staining.
• Excessive Water: Bluestone is porous, so excessive water during cleaning can penetrate the stone, potentially leading to freeze-thaw damage in colder climates. Always ensure that the stone is adequately sealed to resist water absorption.
• Standing Cleaners: Never allow cleaning solutions to dry on bluestone surfaces. They can leave residues that attract dirt or even stain the stone. Always rinse the area thoroughly after cleaning.

Expert Advice

When caring for bluestone, expert advice centers on using the correct techniques and products to maintain the stone’s natural beauty and durability. Here are critical recommendations from stone care professionals:

• Appropriate Cleaners: Always use cleaners specifically formulated for natural stone. These pH-neutral solutions will clean effectively without damaging the stone’s surface. Avoid using bleach, as it can lead to discolouration and chemical degradation of bluestone.
• Regular Sealing: Bluestone should be sealed regularly to protect it from stains and moisture penetration. Experts recommend sealing bluestone every two to three years, depending on exposure to elements and foot traffic. For best results, use a penetrating sealer designed for natural stone.
• Gentle Cleaning Techniques: Use soft cloths for mops and gentle scrubbing actions for routine cleaning. Avoid stiff brushes or abrasive tools that can scratch the stone. For outdoor bluestone, sweeping before washing minimises the risk of scratching from trapped debris.
• Spot Treatment: Treat stains promptly with cleaners meant for specific types of stone stains. Hydrogen peroxide is preferred for organic stains, while poultice pastes are recommended for oil-based stains.
• Professional Consultation: For persistent stains or when unsure about the type of cleaner to use, consult with a stone care professional. They can provide tailored advice and services based on your bluestone’s specific condition and installation.

Conclusion

Using bleach on bluestone can cause irreversible damage. Opt for pH-neutral cleaners and professional products to maintain your bluestone’s integrity. 

If you’re unsure how to proceed or need assistance, consider contacting a stone care expert. By choosing the right care methods, you can protect your investment and ensure your bluestone surfaces remain pristine and beautiful.