Bluestone courts a classic, durable look in many American landscapes, from patios to entryways. Cleaning it properly preserves color, texture, and longevity while avoiding damage. This guide covers safe, effective methods using commonly available products and tools.
Quick Answer
For most homes, rinse the stone, apply a pH-neutral stone cleaner, scrub with a stiff nylon brush, and rinse again. If stains persist, use a stone cleaner concentrate and revisit with a rinse. For outdoor surfaces, finish with a breathable sealer for natural blue stone exterior to protect against future staining.
What You’ll Need
- pH-neutral stone cleaner for bluestone or exterior stone cleaner concentrate for bluestone
- Stiff nylon brush for bluestone cleaning
- Pressure washer for bluestone cleaning (on a low setting to prevent etching)
- Protective gloves and eyewear
- Non-bleach, non-acid cleaners suitable for natural stone
- Sealer for natural blue stone exterior (optional, for aftercare)
Before You Start
Survey the surface for cracks or loose tiles. Repair any damage before cleaning to prevent water intrusion. Work in shade or on cooler parts of the day to minimize cleaner evaporation. Test a small, inconspicuous area first to confirm no color change or etching. Keep pets and children away from the work area until surfaces are completely dry.
Step-By-Step: How To Clean Bluestone
- Remove loose debris with a broom or blower to prevent scratching during scrubbing.
- Rinse the surface with a garden hose or a low-pressure stream from a pressure washer for bluestone cleaning to loosen dirt.
- Mix your chosen pH-neutral stone cleaner for bluestone or exterior stone cleaner concentrate for bluestone according to label directions.
- Apply cleaner evenly across the stone, working in small sections to avoid drying residue.
- Scrub with a stiff nylon brush for bluestone cleaning, using circular motions to lift embedded grime without scratching.
- Rinse thoroughly with clean water, ensuring all cleaner is removed to prevent streaks or film.
- Inspect for any remaining staining. For stubborn areas, repeat the cleaning process or try a fresh application of cleaner concentrate.
- Allow the stone to dry completely. If color variation appears, ensure even drying and consider a second pass in future cleanings.
- Optional: Apply a sealer for natural blue stone exterior following manufacturer guidelines to improve stain resistance and ease future cleaning.
- Regular maintenance includes periodic rinses and gentle cleaning to prevent buildup, especially in shaded or high-alkaline areas.
- Store any leftover cleaners in a cool, dry place and never mix cleaners not labeled for stone use.
- Dispose of rinse water away from gardens and lawns to protect soil health and vegetation.
Troubleshooting
| Symptom | Likely Cause | Fix | Prevention |
|---|---|---|---|
| Stains persist after cleaning | Deep-set stain or mineral deposits | Spot-treat with a cleaner designed for mineral stains or consult a stone professional | Address staining early; rinse after rain; use sealer where appropriate |
| Etching or color change | Acidic cleaner or improper brush choice | Cease use of acidic products; switch to pH-neutral cleaners | Test area first; avoid acid-based cleaners |
| Soap film after rinse | Cleaner residue | Rinse thoroughly with clean water; re-clean a small section if needed | Rinse completely after every cleaning |
| Surface feels very slick | Over-wetting or cleaners with oily components | Rinse more, wait for dry; avoid oily cleaners | Use appropriate pH-neutral cleaners |
Common Mistakes
- Using harsh or acidic cleaners that can etch bluestone
- High-pressure washing at excessive pressure which damages stone edges
- Skipping a test patch, leading to unexpected color change
- Not rinsing thoroughly, leaving cleaner residue and streaks
- Applying sealer too soon or on dirty surfaces, which traps moisture
Tips For Best Results
- Work in cool, shaded areas to prevent rapid drying and streaks
- Maintain a consistent distance and angle when using a pressure washer for bluestone cleaning
- Choose a pH-neutral stone cleaner for bluestone to protect the stone’s natural finish
- Test any sealer on a small area before full application to ensure color match
- Clean proactively after winter to remove de-icing salts and mineral deposits
Call A Professional
Seek professional help if bluestone shows deep cracks, significant edge chipping, or persistent staining despite cleaning. Also contact a pro for large outdoor installations, uneven surfaces, or if you plan to apply a sealer and want a uniform finish.
FAQ
What is the best cleaner for bluestone?
A pH-neutral stone cleaner or exterior stone cleaner concentrate is ideal to avoid damaging the surface.
Can I use a pressure washer on bluestone?
Yes, but use a low setting and keep the nozzle moving to prevent etching or gouging the stone.
Do I need to seal bluestone after cleaning?
Sealing is optional but can improve stain resistance; follow the sealer’s instructions and ensure the stone is completely dry before applying.
How often should I clean bluestone surfaces?
Frequency depends on location and exposure; typical guidance is every 1–2 years for exterior surfaces, or after seasonal buildup.
What should I avoid when cleaning bluestone?
Avoid acidic cleaners, bleach, and abrasive tools that can damage the stone’s surface.
Is a stain-removal treatment necessary for outdoor bluestone?
Only if stains persist after a standard cleaning; otherwise, routine maintenance with pH-neutral cleaners is sufficient.
Buying Guide
When choosing products for cleaning and maintaining bluestone, consider size and coverage, noise level, energy efficiency (for any powered equipment), controls, and placement. Key questions include whether a cleaner is pH-neutral and safe for natural stone, if a sealer is compatible with outdoor use, and whether the surface will benefit from a buffer-friendly brush or a gentler nozzle on a pressure washer. Compare brands for residue-free rinsing, ease of application, and dry time. For outdoor patios or entryways, assess the area layout to determine the appropriate equipment—hand tools for small spaces and low-pressure washers for larger areas. Always verify compatibility with existing stone if there are any special treatment concerns.