How to Add a QR Code to an Existing Headstone

Yes, you can. A small QR plaque attaches to a headstone that is already in place with adhesive, in about ten minutes, with no monument work. Check the cemetery's rules first, choose a spot a visitor can reach while standing, clean the stone, apply on a mild dry day, and press hard for a full minute.

Updated July 27, 2026 · Written and checked by the Lumestone team

Most families arrive at this question late, and that is entirely normal. The stone was set years ago, the inscription said what it could, and then somewhere between a birthday and an anniversary it starts to feel thin. Two dates and a surname is not much of an account of a life.

Adding a QR code to an existing headstone is a small job. There are two routes: attach a plaque to the stone, or have a code cut into the granite by a monument dealer. Almost everyone takes the first, because it costs less, needs no equipment, takes roughly ten minutes at the graveside, and can be undone if the family changes its mind.

It is also older practice than people assume. Quiring Monuments in Seattle was doing this in 2011 and charged $65 to add a code about the size of a postage stamp to an existing headstone, applying them to mausoleums, benches, sundials and urns as well as to grave markers. What has changed in the fifteen years since is the price, the finish quality, and what waits on the other side of the scan.

Do you need permission first?

There are two permissions, and people usually think about only one of them.

The first is the cemetery's. When you buy a plot you generally buy the right of interment rather than the land itself, and the cemetery keeps authority over what appears on it. In practice most cemeteries have no objection to a small adhesive plaque on a monument the family already owns. Objections cluster around anything that changes the footprint: ground stakes, standing signs, anything a mower has to steer around.

Ask specifically, because the phrasing changes the answer. A question put as do you allow QR codes invites a cautious no from someone who has not thought about it. A question put as may we attach a two-inch adhesive plaque to the face of our own monument usually gets a yes, because that is a thing the office already permits under another name. Get the answer in writing, even if it is only a short email. Staff change, and a plaque outlives a conversation. Our guide to cemetery rules covers the wording that works and what to do if the answer comes back no.

The second permission is the family's, and it causes far more trouble than cemetery policy ever does. Headstones are frequently owned jointly in practice if not in law, and a sibling who was not consulted can turn a kind gesture into a decade of quiet resentment. One phone call in advance settles it.

If the marker was supplied by a government veterans program, treat that as the stricter case and ask before attaching anything at all. Those markers tend to carry their own rules about alterations, and the cemetery office will know them.

Where on the stone to put it

Placement is decided by two things at once: where a visitor's hand naturally goes, and where the plaque will be left alone by weather and machinery. Those pull in opposite directions, so there is a real choice to make.

The front face, lower right, is the traditional spot and the most intuitive. Someone standing where visitors stand can hold a phone in front of it without kneeling or leaning across the grave, which matters more than it sounds when the person scanning is eighty. The tradeoff is exposure: full weather, full sun, and full visibility to anyone who dislikes the idea.

The base or plinth is the discreet option. It sits below the eye line, the stone above shelters it from direct rain, and it reads as part of the monument rather than as an addition to it. The tradeoffs are that turf creeps upward and can bury it, string trimmers work at exactly that height, and a visitor has to crouch.

The back of the stone is invisible from the path, which some cemeteries prefer and some families do too. Nobody will find it by accident, so it only works if the family says it is there.

Flat and lawn-level markers are the awkward case, because a horizontal surface collects rainwater, leaves and grass clippings, and anything lying on the code stops the scan. If the marker has a vase block, a raised border or a granite surround, put the plaque on a vertical face of it rather than on the top.

Whatever you choose, decide it at the graveside with the plaque in your hand, not from a photograph on a kitchen table. Stand where you would stand. Hold the phone where you would hold it. A two-inch code wants to be read from close range, so if you find yourself stepping back and squinting, the spot is wrong rather than the code.

Polished granite, marble, bronze and flat markers

Adhesive needs contact area, and contact area is a property of the surface rather than of the glue. It is the single biggest predictor of whether a plaque is still there in ten years.

Polished granite is the ideal case, and most modern headstones offer some. It is dense, close to non-porous at the polished face, and flat enough that a plate makes full contact across its whole back. If the stone has a polished panel anywhere, use it.

Sandblasted or frosted granite is the middle case. It bonds acceptably, but the texture reduces true contact area, so press harder and longer than feels necessary.

Rock-pitched and rough-cut granite is the difficult case. The adhesive touches only the high points, which can be a small fraction of the plate. Most rough-cut monuments have a polished margin or a smooth base somewhere. Find it rather than fighting the texture.

Marble, limestone and sandstone deserve real caution. They are softer, considerably more porous, and prone to shedding a thin flake of their own surface in a hard freeze, which takes the plaque with it. They also stain. funeral.com warns plainly that a strong adhesive is not always cemetery-friendly, and some adhesives can stain stone or fail after freeze-thaw cycles. On a historic marble marker the honest advice is not to glue anything to it. Use the granite base if there is one, a nearby bench, or a separate small marker set at ground level.

Bronze is trickier than it looks. Bronze markers carry an oxide layer and usually a wax or lacquer coating, so adhesive bonds to the coating rather than to the metal. Stripping the wax back changes the finish and starts fresh oxidation. The granite base a bronze marker is mounted on is the better target.

Field practice recognizes three approaches on gravestones: an adhesive plaque in stainless, ceramic or aluminum, a code engraved directly when the monument is made, and a ceramic memorial photo with the code integrated into it. For a stone that already exists, only the first and the last are practical.

Preparing the surface

Bring more than you think you need, because a second trip is an hour of your life. A small bottle of isopropyl alcohol, two lint-free cloths, a soft brush, plain water, a towel, masking tape and your phone will cover it.

1. Brush loose grit, pollen and dead lichen off the target area with a soft brush. Never a wire brush.
2. Wash the area with plain water. Skip household cleaners, which leave salts behind.
3. Dry it completely, then give it longer. Stone that feels dry can still be holding moisture from a week of rain.
4. Wipe with isopropyl alcohol. 3M recommends a 70/30 mixture of isopropyl alcohol and water for preparing surfaces before applying its tapes.
5. Let the alcohol flash off, then do not touch that patch again. Skin oil from one fingertip is enough to create a weak spot.

The National Park Service guidance for grave markers applies to the stone as much as to the plaque: soft brushes and gentle cleaners such as water or a neutral-pH non-ionic cleaner only, and never wire brushes, power washers or harsh cleaners such as bleach. Scrubbing a headstone hard enough to make it look new takes a layer of the stone away every time.

Applying it: temperature, pressure and cure time

This is the step where the outcome is decided, and it turns on conditions rather than on skill.

Pressure-sensitive acrylic adhesives work by flowing into the microscopic texture of a surface. Warmth helps them flow. Cold prevents it. 3M's published guidance for its VHB acrylic foam tapes gives an ideal application range of 70°F to 100°F (21°C to 38°C) and a minimum of 50°F to 60°F (10°C to 15°C). The tape on your plaque may differ in detail, but the physics is the same across the class. Below about 50°F the adhesive is too stiff to wet the stone, and a bond that never wetted the stone is the one found lying in the grass the following spring. Wait for a mild, dry day.

The same datasheet describes how the bond builds: roughly 50 percent of ultimate strength after 20 minutes, 90 percent after 24 hours and 100 percent after 72 hours. The plaque is holding almost immediately, is holding well within a day, and is fully cured by the end of the week.

1. Dry-fit first. Hold the plaque in position, or tape it there with a loop of masking tape, and look at it from a few steps back.
2. Mark two corners with small pieces of masking tape on the stone, so you can place it once and place it straight.
3. Peel the liner. Do not touch the exposed adhesive, and do not set the plaque down face-first on anything.
4. Place it in one movement. These tapes grab immediately and do not reposition without a fight.
5. Press hard with your thumb across the entire face for 30 to 60 seconds. Pressure matters more than duration.
6. Press again after five minutes, remove the guide tape, and then leave it alone for a day.

The Lumestone plaque ships with the industrial 3M adhesive already applied to the back and the QR code already linked to the memorial page, so the work at the graveside is clean, peel, press. Nothing has to be programmed on site, mixed, or left to cure in a car.

Testing the scan before you commit

Test before you peel the liner, not after. Once the tape is down you have lost the option, and the whole advantage of an attached plaque over an engraved one is that you still have options.

Tape the plaque in the intended position and scan it the way a visitor would. Stand where they would stand, at the distance they would use, which for most people is a foot or two away.

Check it in the light people will actually visit in. Late-afternoon sun striking polished granite at a low angle is the difficult case, and it is worth walking around the stone once with the phone to find out whether any angle defeats it. If one does, moving the plaque an inch usually solves the problem.

Try a second phone if there is one to hand. Older handsets are less forgiving, and the people most likely to scan this are the least likely to carry a new one.

Then check something almost no guide mentions: cellular signal. Scan the code with Wi-Fi switched off. Plenty of cemeteries sit in poor coverage, and a link that resolves instantly in your driveway can spin for thirty seconds at the graveside. No provider can fix that, but you would rather know while you are standing there. Visitors can always scan and open the page once they are back in signal.

Last, look at what the visitor sees, on a phone, at the graveside. A page that reads beautifully on a laptop can be a wall of text on a handset. Our guide on what to put on a memorial page covers how to shape it, and there is a live sample memorial you can open on your own phone to see how a finished one behaves.

Can it be removed later?

Yes, though not casually, and that is by design. An adhesive strong enough to survive four winters is strong enough to resist a fingernail.

The method that works is patience. Warm the plaque gently with a hair dryer for a minute or two, which softens the acrylic. Then work a length of fishing line, dental floss or braided cord behind the plate and saw it back and forth, keeping the line tight against the stone. A thin plastic wedge of the kind sold for phone repair does the same job. Do not lever with a screwdriver, which chips granite.

Residue comes off polished granite with a citrus-based adhesive remover and a soft cloth. On unpolished or porous stone, be careful. Solvents can drive residue deeper and leave a shadow worse than what you started with. Test on a hidden area first, and accept that on marble or sandstone some outline may remain.

The honest version is simple. If perfect reversibility matters to you more than anything else, do not attach anything to the face of the stone. Use the granite base, a bench, or a separate marker at ground level. The durability guide explains why porous stone is the risky case for staining and for long-term adhesion alike.

When to use a monument dealer instead

Doing it yourself is right for most families and wrong for some. Call a dealer if the stone is historic or marble, if the cemetery requires an approved contractor, if the monument needs resetting anyway, if you want the plaque mechanically pinned rather than bonded, or if you want the code cut into the granite itself.

Costs vary widely and the market is not standardized. For orientation:

Those figures come from the Seattle Times report on Quiring Monuments, which is fifteen years old and would read higher today, Beyond This Stone's current listing, and Farewelling's lifespan estimates. Our cost guide breaks down the ongoing hosting side, which is where the long-run difference between providers sits.

One argument for attaching rather than engraving is rarely made and probably should be. A code cut into granite cannot be changed. If the web address behind it ever has to move, because a company is sold or a platform is retired, the stone is left holding a dead link and the only remedy is a stonemason. A plaque can simply be swapped for a new one. Permanence in the stone and permanence of the link are not the same thing, and the second is the one genuinely at risk.

Urns, benches and keepsakes at home

The headstone is not the only place a code belongs, and for some families it is not the best one. Plenty of people have no grave to visit at all.

An urn at home takes a plaque on the base or the back, out of sight until someone looks for it. A columbarium niche is more restricted, because the niche front usually belongs to the facility rather than to the family, so ask before attaching anything there. Memorial benches, tree plaques and scatter-garden markers all take a small plate well, and a bench is a particularly natural place, since people already sit and linger there. Quiring were fixing codes to benches, sundials and urns fifteen years ago for exactly that reason.

Then there is the version that has nothing to do with a cemetery. A plaque on the back of a photograph frame, or inside the lid of a keepsake box, gives grandchildren a way in that does not require a car journey. Families often want more than one: the grave, the family home, a sibling in another state.

That case is worth pricing carefully, because it is where most providers charge again for the same memorial. Lumestone Care is $29.99 a year for the whole order rather than per plaque, covering every plaque and every memorial page you have, billed every 12 months at a price locked for life and cancellable at any time. That is why a 2-pack is $69.99 and a 3-pack is $95.99: the second and third plaque add nothing to the ongoing cost. If you are still deciding what belongs on the page itself, the step-by-step setup guide is the place to start.

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