How to Check a Headstone Cleaner's References and Past Work

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I remember the first time I hired someone to clean my grandmother's headstone. It was a hot July afternoon, and I was desperate. The stone was covered in a crust of yellow lichen and bird droppings, and I thought, 'How hard can it be?' I found a guy on a local forum who said he'd been cleaning stones for years. He showed up with a pressure washer, a bottle of something that smelled like a swimming pool, and a wire brush. I watched him for ten minutes, then asked him to stop. The marble had started to pit. Tiny craters, like acne scars. Took me three years and a professional restoration to fix it.

That day taught me something I'll never forget: you can't trust a headstone cleaner just because they say they're good. You have to check their work. You have to talk to real people who hired them. You have to see the before-and-after photos, not the ones they staged in perfect light.

So let me walk you through exactly how to vet a cleaner before you let them touch a stone you love. Because once damage is done, it's done. No undo button on granite or marble.

Start with the Obvious: Ask for Names and Dates

I mean real names of real families. Not just 'Oh, I cleaned a bunch of stones at St. Mary's Cemetary.' That's too vague.

Ask for the full name of the deceased and the cemetery section. Then call the cemetery office. Most will tell you if a cleaner has been reported for damage. I did this once with a guy who claimed to have cleaned forty stones. Turns out, three families had complained about white residue left behind.

Don't be shy about it. You're protecting a memorial. If the cleaner hesitates or says 'I don't have that info handy,' that's a red flag. A good cleaner keeps records. They know exactly which stones they worked on because they're proud of their work.

Look at the Photos – The Right Way

Anyone can take a pretty picture. But you want to see the ugly ones too.

Ask for photos taken in direct sunlight, not shade or overcast. Sunlight shows every stain, every scratch, every patch of lichen. I had a client once who showed me a cleaner's 'after' photo that was taken at golden hour – soft, warm light that hid alot of yellowing. The actual stone looked dull and streaky.

Ask for close-ups of the lettering. Lettering is the hardest part to clean without damage. If the edges of the letters look chipped or the paint is gone, that's a bad sign.

Also ask for photos of stones with different types of stains: moss, rust, bird droppings, lichen. A good cleaner should of examples of each. If all their photos are of clean stones with no visible staining, they might be photoshopping or only working on stones that were already in good shape.

Call the References – and Ask the Right Questions

Don't just call and say, 'Was the cleaner good?' That's too easy. Be specific.

Here's what I ask: 'Did the cleaner use any harsh chemicals or power tools?' 'Did they test a small area first before doing the whole stone?' 'What did the stone look like six months later? Any new stains or discoloration?' 'Did they clean the base and the back too, or just the front?' 'Was the stone wet when they left? Did they dry it properly?'

One reference told me the cleaner left puddles around the base that seeped into the foundation. That caused efflorescence – white salt crystals – that took months to manage.

If a reference sounds hesitant or says 'I guess it was fine,' that's not good enough. You want enthusiasm. You want them to say, 'I'd hire them again in a heartbeat.'

Check for Red Flags in Their Cleaning Methods

This is the part where I get a little bossy. Sorry. But I've seen too much damage.

A good cleaner will tell you upfront: no pressure washing, no wire brushes, no acids. They'll use a pH-neutral, non-ionic cleaner like D/2 Biological Solution. It's the gold standard. It works slowly, over time, but it's safe on marble, limestone, sandstone, granite – everything.

If a cleaner says they use 'a special mix' or 'proprietary chemicals,' ask for the exact product name. If they won't tell you, walk away.

Also ask about their proccess for different stone types. Marble is soft and acidic – I mean, it reacts badly to acid. Limestone is even softer. Granite is tough but can still be scratched. A good cleaner will talk to you about these differences without being asked. If they say 'I treat all stones the same,' run.

Don't Forget the Gut Check

After you've checked references, looked at photos, and grilled them on methods, trust your gut.

I once hired a cleaner who had perfect references and beautifull photos. But when he showed up, he was in a hurry. He kept glancing at his phone. He didn't listen when I said the stone had a crack in the corner. He pressured me to let him use a 'faster' method. I said no. He left. I found someone else.

A good cleaner is patient. They'll spend time explaining their process. They'll offer to do a test patch. They'll tell you it might take multiple visits. They won't promise miracles.

Your grandmother's stone – or your father's, or your child's – deserves that patience. Don't settle for less.

Frequently Asked Questions

Q: How many references should I ask for before hiring a headstone cleaner?

A: At least three. And not all from the same cemetery or the same year. A cleaner who has been working for five years should have a list of at least ten families they've helped. If they can't give you three recent ones, that's a red flag.

Q: What if the cleaner's photos look too good to be true?

A: They probably are. Ask for raw, unedited photos taken in natural light. If they can't provide those, ask for a time-stamped photo of a stone they just finished. You can also ask to visit a site they've cleaned recently – most cemeteries allow visitors during the day. See the stone in person before you commit.

Q: Should I ask about insurance or bonding?

A: Yes, absolutely. A professional cleaner should have liability insurance in case they damage the stone or the cemetery property. Ask for a copy of their insurance certificate. If they don't have it, you're taking a big risk. I've seen stones cracked by falling equipment.

Q: How do I verify a cleaner's claims about their training or certifications?

A: Ask for the specific organization or person who trained them. There are a few reputable groups like the National Association of Cemetery Cleaners or the American Institute for Conservation. Call the organization to confirm. If the cleaner says they trained with a local monument company, call that company. I once had a cleaner claim he trained with a well-known restorer, but when I called, they said they'd never heard of him.

Q: What should I do if a cleaner refuses to let me see their past work?

A: Hire someone else. No exceptions. A good cleaner is proud of their work and wants you to see it. If they're secretive or defensive, they're hiding something. I've had cleaners say 'I don't keep records' or 'I don't like people visiting cemeteries.' That's nonsense. You have every right to see where your money is going.