Why I Stabilized the Marker Before I Cleaned It

headstone cleanning in Pennsylvania | headstone cleaning in California

I’ll never forget the first time I ruined a headstone. Not on purpose, obviously. I was fresh out of college, working for a small preservation crew in upstate New York. We had this beautifull 1840s marble marker for a woman named Eliza, it was covered in black lichen and looked dingy. I was eager to show off. I grabbed my spray bottle of D/2, scrubbed with a soft nylon brush, and watched the lichen slide off. Felt like a hero. Then I stepped back and saw the whole thing tilt. About four degrees. The base had been loose — just sitting on a pile of soil and roots. I’d scrubbed the top but the base was sinking. Took me three tries to re-level it. Big mistake. Never again.

That day I learned a hard lesson: cleaning is cosmetic. Stability is structural. If the stone isn’t solid, you’re just polishing a collapse waiting to happen. So before you touch that spray bottle, before you even mix water, you need to stabilize a headstone before cleaning. Here’s how I do it now. No shortcuts. No heroics.

Step 1: The Wiggle Test and the Listen

I don’t start with tools. I start with my hands. Gently, I place one palm flat on the face of the stone, near the top. Then I apply a slow, steady pressure — maybe five pounds of force, like leaning on a door. If it moves even a millimeter, it’s unstable. I also listen. A creak, a grind, or a hollow thud means the base is shifting or the stone is cracked inside. I’ve found hairline fractures this way that you couldn’t see with your eyes. If the stone rocks, stop. Do not clean it. You’ll push dirt and moisture into the crack and make it worse. Mark it with a piece of flagging tape and move on to the base.

Step 2: Check the Base Like a Dentist Checks a Tooth

Most headstone failures happen at the base. The ground settles, roots push up, water seeps in and freezes. I dig around the base with a wooden dowel — never a metal trowel, because I don’t want to scratch the stone. I look for gaps, rot, or loose soil. If the base is tilted more than two degrees, it needs to be lifted and re-bedded. I use a combination of crushed stone (3/4-inch angular gravel) and sand. No concrete. Concrete traps moisture and causes spalling. I’ve seen 200-year-old sandstone bases turn to powder because someone poured a concrete footer. For a single marker, I’ll dig a hole about 10 inches deep and 8 inches wider than the base, put in 4 inches of gravel, tamp it with a hand tamper, then set the stone. I use a level on every axis. Takes an hour. Worth it.

Step 3: Temporary Supports for Cracked or Leaning Stones

Sometimes the stone is too fragile to move or re-level. That’s when I use temporary stabilization. I’ve got a kit: four 2x4s (pressure-treated, cut to 4-foot lengths), a roll of 3-inch nylon strap, and a few soft foam pads. I strap the stone to a frame — not tight enough to crush, but firm enough to stop wobble. I’ve also used wooden shims under leaning markers. Just slide them in until the stone is plumb. One time I had a 400-pound granite obelisk that was tilted 10 degrees. I used a car jack with a plywood pad to lift it an inch, slipped in a new base of crushed granite, and lowered it. Took all afternoon. But it’s been straight for six years now. If you’re not comfortable doing that, call a pro. Seriously. A falling headstone can crush a foot.

Step 4: Clean Only After the Stone Sits for 48 Hours

Once the base is stable and the stone isn’t moving, I wait. Two full days. Why? Because the ground needs to settle. If you start scrubbing right after you re-set the stone, the vibration can shift the base again. I’ve done it. Watched a perfectly leveled marble tablet sink half an inch into wet soil after I scrubbed it. So I wait. In that time, I check for any new cracks that might have opened up during the move. Then, and only then, do I clean. I use D/2 Biological Solution — it’s pH-neutral and non-ionic. No harsh chemicals. No pressure washer. Just a soft brush and patience. And I always clean from the bottom up. That way dirty water doesn’t run over clean stone. Small detail. Makes a big difference.

Step 5: The Final Check — Walk Away and Come Back

After cleaning, I don’t call it done. I walk away for an hour. Grab a coffee. Sit in the car. Then I come back and look at the marker from three different angles — front, side, and 20 feet away. I check for any new tilt, any fresh cracks, any pooling water around the base. If everything looks good, I take a photo for my records. If something’s off, I adjust. I’ve re-shimmed a stone twice in one day because the ground was soft after a rain. It’s tedious. But I’ve never had a stone fall over after I worked on it. That’s the goal. Not a pretty stone that falls next year. A stable stone that lasts another century.

Frequently Asked Questions

Q: Can I stabilize a headstone without digging it up?

A: Sometimes, yes. If the stone is just leaning, you can use wooden shims or a gravel pack around the base without lifting it. But if the base is broken or the stone is rocking, you’ll need to dig it out. I’ve tried the lazy way — just jamming rocks under the edge — and it never holds. Do it right or don’t do it.

Q: What’s the best material to use for re-setting a headstone base?

A: Crushed angular gravel (3/4 inch) and sand. No concrete, no mortar, no asphalt. You want drainage, not a solid block. I’ve used decomposed granite in a pinch, but crushed stone packs better. For a small marker, a 50-pound bag of gravel is plenty.

Q: How do I know if the stone is too fragile to stabilize myself?

A: If you see large cracks, missing pieces, or if the stone is more than 50% detached from it's base, call a professional. Also, if the stone is marble or sandstone and over 200 years old, the inside might be crumbling. Push on it gently — if you hear a grinding sound, stop. I’ve broken a few things by being overconfident. Not proud of it.

Q: Do I need to stabilize a headstone that’s flat on the ground?

A: Yes, especially if it’s a ledger stone (a flat slab on the ground). They can crack or sink unevenly. I check for rocking by stepping on one corner. If it moves, I lift it, re-level the base, and set it back. A flat stone that’s unstable can trap water and cause freeze-thaw damage. Don’t skip it.

Q: Can I use epoxy or glue to fix a cracked headstone before cleaning?

A: Not recommended for most historic stones. Epoxy is permanent and can trap moisture. If the crack is small, leave it. If it’s structural, you need a conservator who uses reversible adhesives like lime-based mortars. I once glued a small chip back on with epoxy — looked great for a year, then the chip fell off and took a layer of stone with it. Never again.