Something has been sprayed on a Bishopsgate frontage and you want it removed without the terracotta, granite or brick carrying a mark of the cleaning instead.
Nearly all of it comes off. Two surfaces on this street set the limits, and they fail in opposite directions. The modelled terracotta front of the Institute loses its fired skin if anything abrasive touches it. The polished granite plinths on the towers lose their shine. Neither can be repaired in place.
We identify the material, prove the treatment somewhere concealed, then take the mark off. Across EC2 that is normally the same day, seven days a week.
Do you need graffiti removed from your property? Get a fast, hassle-free quote today! Click here to get a professional graffiti removal quote or call us today on: 020 8050 5997
Terracotta Has A Skin, And It Is Millimetres Thick
The most protected frontage on the street is also the one most easily ruined by a competent-looking clean.
What Is Listed
The Bishopsgate Institute was listed Grade II* on 16 July 1964 under entry 1191674. Charles Harrison Townsend, 1894: a modelled buff terracotta front with polygonal turrets, red brick and terracotta behind, and a round-arched doorway on polished granite columns.
Why Terracotta Is Different
Terracotta is fired clay, and firing produces a dense skin at the surface only a few millimetres deep. Behind it the body is far more open and absorbent. That skin is the whole of the weather protection.
What Happens When It Goes
Breach it and that patch takes in water at a rate the rest of the elevation does not. The damage is not cosmetic and it does not stay the same size, because exposed body weathers faster than its neighbours. A wire brush, a grit blast or a pressure lance removes in seconds something fired once in 1894 that cannot be fired again.
And It Is Modelled, Not Flat
Townsend's front is deeply worked, which compounds it. Medium collects in undercuts a flat pad cannot reach, so the operator presses harder on the high points, which is where the skin is thinnest. Reaching the detail without loading the relief is the difficulty here.
Recent London Graffiti Removal Projects
Polished Granite Fails The Opposite Way
Walk a hundred metres and the problem inverts entirely.
Where It Is
The towers along and behind Bishopsgate are finished at street level in polished granite: plinths, entrance surrounds, cladding to the first two or three metres. That band is where marking lands.
Why It Looks Safe And Is Not
Granite is among the hardest things on the street, so it gets treated as indestructible. The polish, though, is not a property of the stone but a mechanical finish applied to it. The stone resists almost anything. The finish does not.
What A Bad Clean Leaves
A dull patch. Any abrasive, any harsh pad, any grit in a water stream leaves a section reading matt against the mirror around it, and it shows worst in the conditions these entrances are designed for: raking light across a flat plane, seen at an angle.
Why It Cannot Be Put Right
Re-polishing is a multi-stage process needing heavy equipment against a flat reference. It cannot be done on a fixed vertical plinth to a standard matching the panel beside it, and a part-polished panel looks worse than a dulled one. The mark is temporary and the repair is permanent, which is the wrong way round.
Start Soft, Move Up Only When It Fails
The method here is chosen by escalation rather than by diagnosis, because on both of these surfaces the cost of starting too strong is unrecoverable.
- Water at low pressure and temperature, on a concealed trial. On fresh aerosol over a sealed surface it occasionally works, and if it does nothing further was needed.
- Low temperature steam at a long standoff. No chemistry, no abrasive, and enough for a recent mark on most sound surfaces.
- Hotter steam, closer, with the standoff reduced in stages rather than in one move. Each stage is read dry before the next is tried.
- A mild solvent gel at a short dwell, chosen for the finish rather than the mark, timed on a trial rather than the container.
- A stronger gel or longer dwell, or a poultice where staining has gone into the material and must be drawn out over hours.
- Dry ice, where a boundary exists for it to work at and water would be a nuisance.
What never appears on that list is an abrasive. Not soda, not grit, not a mechanical pad. On terracotta and on polished granite there is no setting at which any of them is acceptable, and a contractor offering one has not identified the surface.
Where We Would Not Use Steam Even Though We Could
Low pressure superheated steam handles most of this street, and DOFF is the system we use for it. It is still the wrong answer in several places here.
- On polished granite, where sustained heat and moisture can lift or discolour a bedding or sealant line even though the stone is untroubled
- On terracotta with a broken skin, where heat and water drive into the open body and bring salts back as a bloom weeks later
- Above an occupied entrance in the working day, where steam and run-off across a threshold is a slip risk no result justifies
- On failing lime pointing, softer than everything around it and open before the mark releases
- Where the mark is scored rather than applied, since no heat lifts something cut into the surface
In each of those the answer is a gel, a poultice or dry ice instead. Naming where a method stops is more useful than listing what it does.
What The Pellets Cost, And Where That Lands
Dry ice is quoted at a higher hourly rate than anything else and clients reasonably ask why, so it is worth setting out how the figure is built.
The pellets are consumed continuously once the nozzle opens, so they scale with time and area rather than with difficulty. That is the whole premium. Everything else runs the other way: no containment to build, no water to manage, no drying to wait through, and the surface can be assessed the instant the stream stops.
So on a small, awkward, high-value area where water would have to be caught and carried, dry ice is frequently cheaper per job despite costing more per hour. On a long plain run it is not, and we will say so. What sits inside and outside a figure is worked through under factors that affect the cost of graffiti removal, with typical ranges under how much graffiti removal costs in London.
When One Pass Was Never Going To Be Enough
A second application is the commonest cause of a disputed invoice, and almost always it was predictable from the start.
A poultice is an absorbent medium holding a solvent against a surface long enough that staining migrates out of the substrate into it. Nothing is worked or abraded. The variable is contact time, and on absorbent material a single dwell can only draw so much. Push past that and the medium saturates, stops drawing, and can begin returning what it took.
So on marker in unglazed terracotta, open brick or weathered stone, two applications is the method rather than a failure of it. The honest position is to say so at the quotation and price for two. A quotation assuming one pass on absorbent material has either misread the substrate or intends to invoice again. Soda blasting is offered as the way round the wait, and on terracotta it takes the fired skin with the mark.
Do you need graffiti removed from your property? Get a fast, hassle-free quote today! Click here to get a professional graffiti removal quote or call us today on: 020 8050 5997
What Each Surface Looks Like After A Bad Job
The substrate decides the method, and the quickest way to understand why is to look at what failure produces on each one.
Stone And Ceramic
- Polished granite: a matt patch against a mirror finish, worst in raking light, unrepairable in place: polished granite
- Limestone and dressed stone: a burnished sheen where the surface was worked smooth, so damage reads as shine rather than loss: limestone
- Unpainted stock brick: an opened face, lighter, rougher and more absorbent, so the next mark goes deeper: red brick unpainted
- Lime pointing: a raked-out joint with a shadow line, visible across the street and an open route for water: mortar joints
Coated Surfaces
- Painted brick: a dulled or blistered panel where the solvent reached the paint before the mark: painted brick
- Smooth render: a cleaner rectangle reading as a repair, because treatment stopped at the mark rather than a break: stucco smooth and synthetic
- Painted timber to doors and shopfronts: a softened or lifted finish, because mark and coating share one chemistry: painted wood
- Powder coated frames: a chalked band where the wrong solvent took the gloss out of the finish: powder coated metal
Metal And Glass
- Cast iron: bright metal showing where an aged protective film came off with the mark: cast iron
- Glazing: a scored mark no cleaning method reaches, which is a separate discipline: acid etched graffiti removal
Five Questions That Separate Contractors On The Telephone
Most of what matters can be settled before anybody attends, and the answers are quick to judge.
- What if the trial patch contradicts the quotation? The right answer is stop, revise, and let you decline and pay for the trial alone.
- Will public liability evidence come before attending, or on request? Ours goes ahead of the visit, because credentials checked afterwards are too late.
- Do you need water, power or somebody on site? We arrive self-contained with our own water and power, and nobody needs to be there.
- What will the invoice say? If it reads graffiti removal it cannot be recharged or recovered. It should name the elevation and the method.
- Can you attend at the weekend? We work seven days a week, and that is frequently the only window when an entrance is not in constant use.
Why Same Day Is About Slack, Not Speed
Everybody offers same-day attendance, and it is worth knowing what makes it possible, because the removal itself is not the variable.
A steam clean of a plinth takes the time it takes, and a poultice takes hours whatever anyone promises. A same-day response requires unallocated capacity in the schedule and the right kit already on the van, which is planning rather than speed. A firm running at full utilisation has no same day to give.
It also requires a decision made from a photograph rather than a survey visit, which is why the image matters more than the description. And it matters here because a City entrance carrying a tag at nine in the morning is a reputational problem for the occupier before it is a maintenance one. What delay costs a commercial frontage is under hidden costs of not removing graffiti promptly.
Why A Photograph Prices Better Than A Description
A description reliably produces a range and a photograph a figure, and the gap between them is money.
Descriptions carry what a caller notices: the size of the mark and how bad it looks. Neither drives the price. What drives the price is the substrate, the height, what sits below and beside it, and how far the surface runs before a natural break. All four are visible in two photographs and none is reliable in a sentence.
Callers also misidentify materials constantly and in good faith. Granite gets called marble, terracotta stone, render brick, and each error changes the method and the figure. A contractor quoting from the description is either padding for risk or planning to revise on arrival, and both cost more than a photograph would have.
What The Containment Is Actually For
Sheeting looks like tidiness. On a City frontage it is doing four specific jobs.
- Keeping residue off untreated surfaces, sized for where run-off will travel rather than for what is adjacent
- Keeping solvent and pigment out of drainage, which on a paved forecourt means catching it before it finds a gully
- Keeping water off a threshold people are walking across, the likeliest way a cleaning job causes an injury
- Keeping the work off the public, since a ground level mark puts an operator a metre from a busy pavement
How a job is kept controlled with pedestrians crossing it is described under safety precautions during graffiti removal, and the case against force under high pressure washing for graffiti removal.
The Repairing Obligation And Where The Lease Puts It
Almost nobody here owns the elevation they occupy, so the first question is contractual rather than practical.
A full repairing and insuring lease puts external fabric on the tenant, so a marked plinth is the occupier's whatever the freeholder thinks. In a multi-let building the common parts sit with the landlord and recover through the service charge, so the same mark on an entrance surround is an estate cost. In a retail unit the line is frequently the fascia: structure above to the landlord, shopfront below to the tenant.
The consequence is the same in all three: establish where the mark physically sits before anybody quotes, because getting it wrong costs a fortnight, and word the invoice to match, naming elevation and method, because a recovery has to survive a query from somebody who was not there. For an independent trader with one unit none of this applies, which is why a side street shop is cleaned the same morning while a tower entrance takes three weeks. Who carries the obligation is unpicked under liability issues and who is responsible for graffiti removal, and whether a policy responds under does insurance cover graffiti removal in London.
Measuring Whether Anything You Did Worked
Money spent on prevention here is usually spent blind, and the fix is a record rather than a product.
Keep a dated note of every incident with a photograph and a location. Within three months that tells you whether a frontage is hit repeatedly or once, and that distinction decides everything. A single incident needs a clean. A repeated one needs the position changed.
Then measure against that baseline rather than an impression. If the interval between incidents lengthens after a light was aimed at the wall rather than the pavement, the light worked. If nothing changes after a coating goes on, the money is better spent on response time. Speed of removal outperforms every physical measure here, because a mark cleared within a day tells the next person the frontage is watched. A coating is the last step, it belongs on an already clean surface, and on porous terracotta and lime-mortared brick it must be permeable or the wall fails instead: anti graffiti coatings, what they are and how they work, with the products compared under best anti graffiti coating products for London properties.
What A Good Photograph Contains
Two frames do the work, and most of what people send is missing one of them.
The close frame is near enough that the material is identifiable: the texture of terracotta, the grain in granite, whether brick carries paint. Square to the surface, in even light rather than direct sun, because glare on a polished plinth hides what needs seeing. The wide frame is from where a person would normally stand, showing the elevation, the height, what is below and how far the surface runs. That frame prices the access.
A bad photograph misses context and scale. A tight crop on an unidentifiable background tells a contractor nothing but that there is a tag. Include something of known size, take both frames before anybody touches it, and try nothing first: a wire brush on terracotta, an abrasive pad on granite or a household solvent on painted timber each make the job that follows harder and dearer than the mark did. If the surface turns out to belong to somebody else, how and where to report it is under reporting vandalism in London, and the home-remedy question under DIY versus hiring professionals.
Where We Attend Around Bishopsgate
Bishopsgate itself and Liverpool Street. Houndsditch and Camomile Street. Wormwood Street and London Wall. Middlesex Street and Devonshire Row. Brushfield Street and Artillery Lane. Plus the service yards, goods entrances, bin stores, boundary walls and shutters behind them, which take most of the marking a principal entrance never shows.
Work Completed Across EC2
We have taken aerosol off polished granite plinths without dulling a panel, drawn marker from unglazed terracotta across two dwells, cleaned modelled detail without loading the relief, cleared goods entrances before the working day, and worked ground level frontages with containment sized for a busy pavement. What designated fabric requires of a method is covered under graffiti on historic buildings in London, and the chemistry under chemical solutions for graffiti removal.
Who Instructs Us Around Bishopsgate
| Who calls | What they need from it |
|---|---|
| Facilities teams in multi-let office towers | Polished stone cleared without a dull patch, and cover evidenced in advance |
| Managing agents recovering through a service charge | An invoice naming elevation and method that survives a tenant query |
| Tenants on full repairing leases | Confirmation of where the obligation sits before the work is instructed |
| Independent shops and cafes on the side streets | A frontage cleared before opening, priced from a photograph |
| Trustees and custodians of listed buildings | A method acceptable on terracotta, with a record of exactly what was used |
One Job, Decision By Decision
A tag across a polished granite plinth and onto the unglazed terracotta band above it, at an entrance in daily use.
The two materials ruled out opposite things. Nothing abrasive could touch the granite, because the polish cannot be restored in place. Nothing could be driven into the terracotta, whose skin was sound, which ruled out heat applied close.
Two trials, both hidden: granite behind a planter, terracotta on a return face. The granite released to a mild gel at a short dwell with no heat, which was the softest thing that worked and therefore what was used. The terracotta did not, because the marker had gone into the body, so it went to a poultice running overnight.
The granite was finished first and then masked, because a poultice can weep and a weep line on polished stone is another dull patch. The poultice came off before the entrance filled. A faint shadow stayed in the terracotta, photographed and left, because a second full dwell risked drawing salts with it. The entrance stayed open throughout.
What You Are Given Afterwards
Before and after frames shot from a single fixed position. A written note of each surface with the method, dilution, dwell and standoff used on it. A straight account of anything still visible and how close you have to stand to see it. And an invoice detailed enough to put through a recharge or a service charge.
Removing It Against Painting Over It
On terracotta and polished granite nobody seriously offers painting over, because it alters a finish rather than repairing one, and on a Grade II* elevation it needs consent. On painted brick and render the calculation is familiar: paint over a mark and it returns to the same place, each round thickening the coat until the detail beneath stops reading.
Nearby Areas We Also Attend
We work across the City and its fringes, including Spitalfields, Shoreditch, Aldgate, Old Street, Barbican, Hoxton, Brick Lane, Whitechapel, Clerkenwell and Tower Hill.
Bishopsgate Graffiti Removal: Frequently Asked Questions
Why is terracotta treated so cautiously?
Because the fired skin is only millimetres deep and it is the whole of the weather protection. Once it is breached the body behind absorbs water and the damage spreads rather than staying put.
Which building is listed?
The Bishopsgate Institute, Grade II* since 16 July 1964 under entry 1191674. Charles Harrison Townsend, 1894, with a modelled buff terracotta front and polished granite columns to the doorway.
Granite is hard. Why can it not be scrubbed?
The stone is hard; the polish is not. It is a mechanical finish, and any abrasive leaves a matt patch that reads against the mirror surface around it.
Can a dulled granite panel be re-polished?
Not in place to a matching standard. Re-polishing needs heavy equipment against a flat reference, and a partly re-polished panel looks worse than a dulled one.
What does a bad clean look like on brick?
An opened face, lighter and rougher than its surroundings, which then absorbs more than it did, so the next mark penetrates further.
Why do you start with the weakest method?
Because on these surfaces starting too strong cannot be undone. If plain water at low pressure lifts it on a trial, nothing further was ever needed.
Is a second application an extra charge?
Not where the substrate always needed one. On absorbent terracotta or open brick two applications is the method, and it should be priced that way from the start.
Is dry ice worth the hourly rate?
On a small awkward area where water would have to be caught and carried, frequently yes, because there is no containment to build and no drying to wait through. On a long plain run, no.
Why do you want a photograph?
Because the substrate, the height and what sits below the mark drive the price, and all three are visible in two frames while none is reliable in a description.
Does anybody need to be on site?
No. We arrive self-contained with our own water and power, take nothing from the building, and send public liability evidence ahead of the visit rather than on request.
Can you attend at the weekend?
Yes. We work seven days a week, and on a City entrance the weekend is frequently the only window when the threshold is not in constant use.
Who pays, the landlord or the tenant?
It depends on the lease. A full repairing lease puts external fabric with the tenant; common parts in a multi-let building sit with the landlord and recover through the service charge.
Somebody tried to scrub it first. Does that matter?
On terracotta and polished granite, considerably. Abrasion causes damage neither surface can recover from, and a scrubbed marker spreads into a wider stain than the tag was.
Can several addresses be done in one visit?
Yes, and it is the largest saving available. Agents and operators holding a run of buildings should ask for it priced as a single attendance.
What is left in writing?
Photographs from a fixed point, a note of method, dilution, dwell and standoff for every surface, and a plain statement of anything remaining.
Decide the clean first and the protection afterwards, never the other way round. The reasoning is set out under anti graffiti coatings, what they are and how they work.
Do you need graffiti removed from your property? Get a fast, hassle-free quote today! Click here to get a professional graffiti removal quote or call us today on: 020 8050 5997