How to Clean a Headstone: Safe Step-by-Step Guide

Cleaning a headstone is a respectful way to restore its appearance and preserve it for years. The key is to be gentle: most damage comes from harsh chemicals, metal tools, and pressure washing. Before you start, check the stone for cracks, loose pieces, or flaking. If it’s fragile, skip cleaning and consult a professional conservator. For routine cleaning, you’ll need a few basic supplies.

What You’ll Need

Soft-bristled brush (plastic or natural bristle, not metal; a nylon dish brush works well)
Plastic scraper or wooden craft stick (for stubborn dirt)
Clean water (bottled or distilled is best; tap water may contain minerals that leave deposits)
Mild, pH-neutral soap (like diluted dish soap) or a specialized stone cleaner (optional; plain water often suffices)
Spray bottle or bucket
Soft cloths or sponges
Gloves (to protect your hands from dirt and cleaning solutions)

Step-by-Step

Assess the headstone. Look for cracks, chips, loose fragments, or signs of flaking. If the stone is unstable or already damaged, do not clean it—contact a professional conservator. Also note the type of stone (granite, marble, sandstone, etc.) to adjust your approach.
Remove loose debris. Gently brush off loose dirt, leaves, and cobwebs with a dry soft brush. Work from the top down. Avoid using metal scrapers or wire brushes—they scratch the surface.
Wet the stone thoroughly. Use a spray bottle or a bucket of water to moisten the entire surface. This helps loosen dirt and prevents the cleaning solution from drying too quickly. Avoid pressure washers, as they can erode the stone and force water into cracks.
Apply a mild cleaner (if needed). For most headstones, plain water is enough. If you need extra cleaning power, mix a few drops of pH-neutral dish soap in a bucket of water. Apply with a soft brush or sponge. Avoid bleach, ammonia, or any acid-based cleaners—they can damage the stone and harm plants.
Scrub gently. Using a soft-bristled brush, scrub in a circular motion, working from the bottom up to prevent streaking. Pay extra attention to areas with biological growth (moss, lichen). For stubborn spots, use a plastic scraper or wooden stick to gently lift the dirt—never chisel or scrape hard.
Rinse thoroughly. Rinse the stone with clean water until all soap residue is gone. Leftover soap can attract more dirt. Use a spray bottle or a bucket of clean water; avoid high-pressure hoses.
Let it air dry. Allow the headstone to dry completely. Avoid wiping it with cloths that might leave lint or scratch the surface. Check for any remaining spots and repeat the process if necessary.

Common Mistakes

Using bleach or harsh chemicals: These can discolor the stone, break down its surface, and harm surrounding vegetation.
Scrubbing with metal tools: Wire brushes, steel wool, or scrapers leave scratches that are permanent.
Pressure washing: The high pressure erodes the stone and can force water into cracks, causing further damage.
Cleaning a damaged stone: If the headstone is already cracked or flaking, cleaning can make it worse.
Using tap water with high mineral content: This can leave white deposits (efflorescence) on the stone.

Tips

Test any cleaner on a small, inconspicuous area first.
Work on a cloudy day or in shade—direct sun dries the cleaner too quickly and can leave streaks.
For lichen or moss, soak the area with water and gently scrub; if it persists, consult a professional.
If the headstone is very old or made of soft stone (like sandstone), avoid any soap and use only water.
After cleaning, you can apply a stone-safe sealant (if recommended by a professional) to help protect against future staining.

Troubleshooting

White spots appear after drying: These are mineral deposits from hard water. Rinse again with distilled water and gently buff with a soft cloth.

Moss or lichen won’t come off: Soak the area with water for 15–20 minutes, then gently scrub. If it still persists, do not use a wire brush—ask a conservator for advice.

The stone looks streaky: This usually happens when the cleaning solution dries too quickly. Rewet the stone and rinse again, working in smaller sections.

The headstone is very fragile: If pieces are loose or flaking, stop cleaning. Contact a professional conservator who specializes in gravestone restoration.

Frequently Asked Questions

Can I use vinegar to clean a headstone?

No—vinegar is acidic and can etch the stone, especially marble and limestone. Stick to pH-neutral cleaners or plain water.

Is it okay to use a pressure washer?

No, pressure washers are too aggressive and can damage the stone. Use a gentle spray from a hose or a spray bottle.

How often should I clean a headstone?

Once a year is usually enough, but it depends on the environment. If moss grows quickly, you may need to clean more often—just be gentle.

Can I use a wire brush to remove stubborn dirt?

No—wire brushes scratch the stone and can cause permanent damage. Use a plastic scraper or a wooden stick.

What if the headstone has a bronze plaque?

Bronze plaques can be cleaned with a soft cloth and a specialized bronze cleaner, but avoid getting any cleaner on the stone. Test in a small area first.

Should I use a commercial stone cleaner?

Only if it’s specifically labeled as safe for headstones and is pH-neutral. Avoid products with acids or abrasives. When in doubt, use plain water.

Sources: National Park Service. Menus and buttons can differ slightly by version. Spotted something out of date? Tell us.