How to Clean a Granite Headstone: A Step-by-Step Guide
What You'll Need
- Soft-bristle brush — natural or nylon, never wire
- Plastic scraper — for stubborn buildup, never metal
- Clean water — bring a gallon jug if no water source nearby
- D/2 Biological Solution — the industry standard cleaner for stone memorials
- Soft cloths or sponges — for wiping and detail work
- Rubber gloves — protect your hands from the cleaning solution
Step-by-Step: How to Clean a Granite Headstone
Assess the Stone
Before you start, take a good look at the headstone. Note any areas with heavy algae growth, lichen, mineral staining, or structural damage like cracks. Cleaning can address biological buildup — but cracks or deep erosion may need professional restoration instead.
Wet the Stone First
Thoroughly wet the entire granite surface with clean water before applying any cleaner. This loosens surface dirt and prevents the cleaning solution from absorbing unevenly. Use a gentle pour — never spray at high pressure.
Apply D/2 Biological Solution
D/2 is the cleaner recommended by the Association for Gravestone Studies and the National Park Service. It's safe for granite, kills biological growth (algae, lichen, mold), and won't harm surrounding plants or grass. Apply directly to the wet stone and let it dwell for 5–10 minutes.
Scrub Gently
Using a soft-bristle brush, scrub in small circular motions across the surface. Pay extra attention to engraved lettering (use an old toothbrush here), the base where dirt pools, and any dark algae staining. For thick lichen buildup, a plastic scraper can carefully lift material before scrubbing — never use metal.
Rinse Thoroughly
Rinse the entire stone with clean water until all cleaner and loosened debris is gone. Repeat the scrub-and-rinse cycle if needed for heavily soiled areas. Don't rush this step — leftover cleaner residue can attract dirt.
Let It Air Dry
Allow the granite to air dry fully. D/2 continues working for several weeks after application — you'll often see biological die-off continue as the stone dries. This is normal. Revisit in 30 days for a light follow-up cleaning if needed.
How Often Should You Clean a Granite Headstone?
| Environment | Recommended Frequency |
|---|---|
| Open, sunny cemetery | Once a year |
| Moderate shade / mixed | Twice a year |
| Heavy shade, moist climate | Three times a year |
| Heavy lichen / deep staining | Two cleanings close together, then annual |
Does Granite Finish Type Matter?
Polished granite(glossy surface) — clean gently to preserve the shine. Avoid anything abrasive that could dull the polish.
Flamed or thermal granite(rough, matte texture) — slightly more durable to scrubbing, but the same rules apply. No wire brushes, no bleach, no pressure washing.
When to Call a Monument Professional
Some issues go beyond routine cleaning. Call a monument specialist if you see:
- Deep mineral staining that won't lift with D/2
- Structural cracks, chips, or leaning
- Severe lichen that has penetrated into the stone surface
- Faded, worn, or damaged engraving
A professional can assess whether the stone needs restoration, re-engraving, or resetting in addition to cleaning.
Choosing a Granite Memorial That Lasts
The best way to keep a headstone beautiful is to start with quality stone. Every Gaulden Monuments memorial is made from quality granite, built to hold its finish for decades. Compare options in our guide to types of granite for monuments.
Browse Granite Upright Monuments → Questions? Call us: (803) 327-2760 — Family-owned since 1961Frequently Asked Questions
Can I use bleach to clean a granite headstone?
No. Bleach can discolor and weaken granite over time. It also kills surrounding grass and plants. Use D/2 Biological Solution — it's specifically formulated for stone memorials and environmentally safe.
Can I use a pressure washer on a headstone?
Avoid it. High water pressure can erode engraved lettering and damage the stone's surface, especially on older or weathered granite. A gentle pour and soft brush are always the safer choice.
What is the best way to remove lichen from a granite headstone?
D/2 Biological Solution is the most effective and safest option. Apply it, let it dwell for 5–10 minutes, then gently scrub. For thick lichen, use a plastic scraper to carefully lift the bulk before applying solution.
How do I clean the engraved letters on a headstone?
Use a small soft-bristle brush — an old toothbrush works well — with D/2 solution. Work gently in the grooves of the lettering. Never use anything metal or stiff, which could widen or damage the cuts.
How often should I clean a granite headstone?
Once or twice a year is ideal for most headstones. Increase to three times per year for stones in heavily shaded or moisture-prone environments where biological growth is more aggressive.
Will cleaning damage the granite polish?
Not if done correctly. D/2 solution and soft brushes are safe for polished granite. Abrasive cleaners, wire brushes, and bleach are what cause polish damage — avoid those and your stone's finish will be fine.
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