Cleaning Methods
How Do You Clean a Headstone Without Damaging It?
Quick answer
Clean a headstone by soaking it thoroughly with plain water, then scrubbing gently with a soft natural-bristle or nylon brush, working from the bottom up in the shade. Rinse well and let it air dry. Avoid metal brushes, bleach, vinegar, and pressure washers — all of them can permanently etch, discolor, or weaken the stone.
The safe process, step by step
Start by soaking the entire surface with plain water for several minutes — this loosens surface dirt and keeps the stone from absorbing cleaning solution unevenly. Work in a shaded area or on an overcast day; direct sun dries cleaning solution too fast to be effective and can cause streaking.
Scrub in small, circular motions using a soft-bristle brush, moving from the bottom of the stone upward so dirty runoff doesn't re-stain areas you've already cleaned. For carved lettering, a soft toothbrush reaches into grooves without forcing debris deeper in. Rinse thoroughly with clean water and allow the stone to air dry naturally — never wipe it with a cloth that could leave lint or fibers in porous stone.
Tools to use — and what to avoid entirely
Stick to soft natural-bristle or nylon brushes, plain water, and a conservation-grade biological cleaner if there's algae, lichen, or moss present. Skip anything with metal bristles, abrasive pads, or scrapers — they can scratch the surface and create tiny grooves where dirt and biological growth collect faster afterward.
Never use bleach, vinegar, ammonia, or other household acids. These can react with minerals in the stone, cause discoloration that gets worse over time, and accelerate erosion of carved details. A pressure washer is also risky: the force can drive water into hairline cracks, erode softer stone like marble or sandstone, and dislodge loose fragments on older monuments.
Why gentleness matters more than strength here
Headstones are exposed to the elements year-round, and most damage isn't caused by dirt — it's caused by well-meaning cleaning attempts using the wrong products or tools. Stone is more porous and more fragile than it looks, especially marble and older sandstone. The goal is the gentlest method that gets the job done, repeated patiently, rather than the strongest one that gets it done in a single pass.
Prefer to have this handled for you? Sacred Stone visits Utah County cemeteries monthly using only stone-safe methods.
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