Something has been sprayed on an Aldersgate frontage and you want it off properly, leaving the concrete, brick and stone exactly as they were.
Nearly all of it comes off. Two local facts decide the job. The landmark here is a building whose surface was deliberately hammered off by hand, once, and cannot be hammered again. And its listing covers the ground as well as the towers, with Roman masonry and churchyard gravestones built into the landscape you would be standing on.
We establish what the surface is and what the finish was meant to be, prove the treatment concealed, then lift the mark. Across EC1 and EC2 that is usually the same day, seven days a week.
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A Surface That Was Already Removed Once
Most heritage cleaning protects a finish that was applied. Here the finish was taken off, by hand, and that changes every decision.
What Is Listed
The Barbican was listed Grade II* on 20 February 2003 under list entry 1001668. It is Chamberlin, Powell and Bon with Ove Arup and Partners as structural engineers, designed from 1956 and built between 1962 and 1982.
How The Concrete Was Finished
The concrete used a granite aggregate in coloured cement. After each pour cured for 28 days inside its wooden formwork, workers struck the set surface with pick axes to remove just enough material to expose the aggregate beneath, without going deep enough to compromise the structure. A gentler bush-hammered finish was used in some interior common areas.
Why That Was Done
Three reasons, all of which matter to a removal. It concealed the horizontal joints between successive pours so the columns read as monolithic. It was chosen to weather uniformly to a stone grey with the minimum of streaking. And the texture itself sheds water, which is what prevents local discolouration running down the face.
What It Means For A Mark
Anything abrasive removes hand-work that cannot be replaced. Nobody can re-hammer a patch, because the depth was judged once against the structure and there is no second allowance. And anything aggressive enough to strip the patina destroys the exact quality the architects specified the finish to develop. On this concrete, the surface is the design.
Recent London Graffiti Removal Projects
The Ground Is Listed Too
The second fact catches contractors who check the towers and stop there.
What The Designation Covers
The listing treats the public, communal and domestic gardens, courtyards and squares as an essential architectural component rather than a setting. That includes the formal canals with their fountains and cascades, the terraced gardens and ponds, and the built-in concrete plant boxes on the residential balconies.
And What Is Built Into It
Gravestones from St Giles' churchyard and surviving remains of the Roman wall are incorporated into the landscape design. They are not adjacent to the estate, they are part of it.
Why That Is A Practical Problem
Marking happens at standing height, which on an estate means the low walls, the plant boxes, the courtyard surfaces and the boundary treatments. Every one of those sits inside the designation, and at least one of them may be Roman. A crew that arrives with a pressure washer and a general sense that the tower blocks are listed has checked the wrong thing entirely.
So The First Call Is Not To Us
It is to whoever holds the building record, to establish which surface you are actually looking at. That takes ten minutes and it decides whether this is an ordinary job or a consented one.
What The Marking Is Made Of
On pick-hammered concrete the medium matters more than it does almost anywhere, because the surface has no coating to sacrifice.
Aerosol sits on the exposed aggregate and in the voids between it. It is the most tractable of the three and still difficult, because the texture that sheds water also holds pigment in its hollows. Marker is worse: the dye is in solution, exposed concrete is porous, and it travels. Thrown emulsion is different again, keying into the texture mechanically rather than penetrating it, which sounds easier and frequently is not, because removing it from the hollows without touching the high points is precise work.
The surface decides the method and here it decides it narrowly. Whatever is used has to lift the medium out of the texture without taking any of the aggregate with it. Occasionally that is not achievable: where a marker has been on exposed concrete through a winter, full recovery is not always possible and a shadow remains in the deepest voids. We say so at the quotation rather than after the invoice.
Why Steam Is The Only Thing That Goes Near It
On this fabric low pressure superheated steam is not preferred, it is what remains after everything else is ruled out.
Pressure is out because force applied to exposed aggregate loosens it, and once a stone lifts out of the face the void is permanent. Abrasives are out for the same reason with more certainty. Strong solvents are risky because concrete of this age and porosity absorbs them and can return them as staining weeks later. What is left is heat, which softens the binder in the mark until it releases, applied at a pressure low enough that the surface is never asked to resist anything.
DOFF is that system in practice, and on this concrete the standoff carries as much weight as the temperature. Held too close, even low pressure concentrates enough to work on the aggregate rather than the mark sitting between it. That distance is established on a trial patch, in a place nobody looks, and read once the surface is dry.
Where The Money Goes On Dry Ice
Dry ice blasting is proposed here often, and its cost profile is unusual enough to be worth setting out before you compare quotations.
| Cost element | How it behaves |
|---|---|
| Pellets | Consumed continuously while the nozzle is open, so they scale with area and with time rather than with difficulty |
| Labour | Usually shorter than a wet method, because there is no containment to build and no drying to wait through |
| Set-up | Sheeting to catch dry debris, which is quicker to lay and quicker to clear than water containment |
| Return visits | Rarely needed, because the surface can be assessed the moment the nozzle stops |
So dry ice is consumable-heavy and labour-light, and a wet method is the reverse. On a small awkward area where water has nowhere to go, dry ice is frequently cheaper overall despite the higher hourly figure. On a long plain run it is not.
A Poultice Works On Time, Not Force
The method people understand least is the one best suited to porous concrete, and the misunderstanding is always the same.
A poultice does not scrub. It is an absorbent medium holding a solvent in contact with the surface for a period long enough that the staining migrates out of the substrate and into the medium. Nothing is worked, nothing is abraded, and the wall is not touched mechanically at any point. The variable is dwell, and on exposed aggregate that dwell is longer than on almost anything else because the pigment has gone into voids rather than sitting on a plane.
Which means the honest answer to how long it takes is hours, sometimes overnight, and frequently twice. A second application on a longer dwell is how the method works on a porous face, not evidence the first one failed. Soda blasting gets suggested as the way round the wait. On pick-hammered concrete it is the one thing that must never happen, because soda takes aggregate.
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The Surfaces People Guess Wrong About
Around here the substrate is rarely what it looks like from ten metres.
Looks Tough, Is Not
- Exposed aggregate concrete, which reads as the hardest thing on the street and gives up its stones to anything abrasive
- Unpainted stock brick on the older frontages, porous and quick to spall: red brick unpainted
- Portland and other dressed stone, which burnishes rather than chips so the damage reads as shine: limestone
Looks Delicate, Is Manageable
- Sound modern painted brick, where the coating is genuinely sacrificial: painted brick
- Powder coated entrance frames and service doors, provided the solvent is chosen for the finish rather than the masonry: powder coated metal
- Smooth render in good condition, which tolerates heat well and force not at all: stucco smooth and synthetic
Exactly As Difficult As It Looks
- Lime pointing on nineteenth century and older walls, softer than the brick and first to open: mortar joints
- Textured render, which hides the mark and the damage equally well in its profile: rough stucco
- Painted timber to doors and shopfronts, where mark and finish answer to one chemistry: painted wood
- Cast iron railings and gates carrying an old film worth more than a fresh one: cast iron
- Glazing, where a scored mark is a separate discipline: acid etched graffiti removal
The Record Is Part Of What You Are Buying
On designated fabric the photographs are not reassurance, they are a deliverable with a use.
They are shot before and after from one position that does not move between them, because a comparison between two different angles proves nothing. They name the surface, the method, the dilution, the dwell and the standoff. They show anything left behind rather than framing around it. And they are taken whether or not anybody asks, because on a listed estate the record is the evidence that maintenance was carried out appropriately, and its absence is a problem years later when nobody involved is still there.
The rest of the standard runs alongside it. We attend seven days a week, self-contained with our own water and power so nothing is drawn from the building, public liability evidenced before attendance rather than on request, and nobody needs to be there while we work.
Overnight And Before Opening
A good deal of the work here happens when the estate and the offices around it are quiet, and that is a scheduling decision rather than a discount.
Before opening suits a commercial frontage, because a barrier at nine in the morning costs the occupier the day's first trade. Overnight suits a residential courtyard only for wet and gel methods, because dry ice is loud and sound carries between blocks. A poultice suits either, since the dwell runs while nothing is happening anyway and the covering comes off before anybody arrives.
What cannot be compressed by working early is anything above the first floor, which needs access equipment arranged in days, or a consented surface, where the conversation with whoever holds the building comes before the work rather than alongside it. Both are worth raising at the enquiry.
Where The Hours Go On A Listed Estate
Quotations here differ more than the marks do, and what drives the price is the proportion of the visit spent not removing anything.
| Inside the figure | Outside it |
|---|---|
| Survey, trial patch, standoff and dwell established and read dry | Access equipment above the first floor, hired and passed on at cost |
| Protection of every surface not being treated, which on a designated landscape is most of them | Any consent the work turns out to require |
| The removal itself, including a second application where the substrate always needed one | Making good damage that was already present before we arrived |
| Containment, residue removal and the photographic record | A second full visit caused by a substrate misdescribed at enquiry |
If a trial contradicts the quotation we stop, revise, and let you decline and pay for the trial alone. The wider pricing structure is set out in factors that affect the cost of graffiti removal and how much graffiti removal costs in London.
Where The Budget Sits In A Multi-Site Operator
A good share of the frontages around here belong to businesses with more than one address, and that changes who can actually authorise a removal.
In a national operator the branch sees it first and rarely instructs it. The budget sits with facilities or estates, often regionally, and the lease may put the structure with the landlord and the shopfront with the tenant, with the fascia as the line. In a franchise it inverts: the franchisee owns the problem and the brand owns the standard, so the work must meet a specification the payer did not write.
The route in both is the same. Establish where the mark sits before anyone quotes. Get the invoice naming the elevation and the method rather than reading graffiti removal, because that is what lets an internal recharge or service charge recovery survive a query. For an independent trader on a single site, none of that applies: one person decides and it happens that day. Responsibility is worked through under liability issues and who is responsible for graffiti removal, with the insurance position under does insurance cover graffiti removal in London.
What The Layout Itself Invites
An estate built on podiums, walkways and enclosed courtyards produces marking in predictable places, and the places are structural rather than accidental.
A walkway with a blind return gives cover. A service door in a recess gives cover and a clean flat surface at once. A low wall facing away from every window gives an unobserved position with an audience on the far side. Contrast that with an open square overlooked on four sides, which almost never gets used.
The interventions that follow are cheap and unglamorous. Light aimed at the surface rather than at the ground in front of it. Removing the cover, whether that is a bin relocated or a planter added. Prompt removal, because a mark that survives a month says the surface is unwatched. A coating is the fourth answer, not the first, and on exposed aggregate and lime-mortared fabric it must be permeable or the wall fails instead: anti graffiti coatings, what they are and how they work, with the comparison under best anti graffiti coating products for London properties.
Photograph It, And Why
Before you telephone anybody, take three photographs. There are four separate reasons and most owners know only the first.
- It gets you a firm figure instead of a range, because the close shot is what identifies the substrate and the wide shot is what identifies the access.
- It dates the damage, which an insurer or a landlord will ask for and which nobody can reconstruct afterwards.
- It records the condition of everything adjacent, which is what protects you if somebody later points at a defect and suggests the cleaning caused it.
- It is the only evidence that survives the removal, so if you want enforcement to go anywhere it has to exist before the wall is cleaned.
Where the surface turns out not to be yours, reporting routes sit under reporting vandalism in London, and the argument against trying a product yourself first under DIY versus hiring professionals.
The Order On A Mixed Elevation
Where a mark crosses materials, the sequence is fixed and knowing it tells you whether a contractor has one.
Protection first, on everything not being treated rather than only on what is adjacent, sized for where residue will actually travel. Then the most robust material, because debris and overspray fall downwards and it is easier to clean a tough surface twice than a sensitive one once. Then the intermediate surfaces. Then the most sensitive, worked by hand, last, when nothing else can fall onto it.
On this fabric that usually means brick before concrete, concrete before stone, and anything painted or modelled last of all. Run-off is directed away from finished work at every stage, and the whole elevation is judged dry, from where it is actually seen, rather than at arm's length while wet. How a job is kept controlled with the public crossing it is described under safety precautions during graffiti removal, and the case against force under high pressure washing for graffiti removal.
Where We Attend Around Aldersgate
Aldersgate Street and Long Lane. London Wall and Wood Street. Beech Street and Golden Lane. Barbican podium level and the walkways off it. Charterhouse Street and Carthusian Street. Fann Street and Bridgewater Square. Plus service yards, bin stores, low walls, courtyard surfaces and boundary treatments, which take most of the marking a tower elevation never shows.
Work Completed Across EC1
We have lifted aerosol out of exposed aggregate without loosening a stone, drawn marker from porous concrete in two applications, cleaned low estate walls where the surface finish was the thing being protected, worked podium and walkway level with containment kept off planting, and cleared commercial frontages before the offices opened. Fabric of this kind is dealt with under graffiti on historic buildings in London, and the products under chemical solutions for graffiti removal.
Who Instructs Us Around Aldersgate
| Who calls | What they need from it |
|---|---|
| Estate and facilities teams on listed schemes | A method acceptable on designated fabric, evidenced before attendance |
| Managing agents holding City residential blocks | An invoice naming elevation and method, recoverable through a service charge |
| Independent shops and cafes off Long Lane and Golden Lane | A frontage cleared before opening, priced from photographs |
| Multi-site operators and franchise holders | Work that meets a brand specification and an invoice that recharges internally |
| Freeholders of nineteenth century frontages | Removal that leaves lime pointing exactly as found |
One Job, Decision By Decision
A tag across pick-hammered concrete and the brick return beside it, at podium level, on a designated landscape.
The designation decided the method before the substrate did. Nothing abrasive could go near the concrete, and nothing that would alter the surface finish was available, which ruled out the approach on the quotation the client already held. The brick return was lime-pointed, which ruled out pressure there too.
Two trials went on rather than one: a low section of concrete behind a plant box, and a piece of brick at the return. The concrete trial came back with the aerosol lifted from the high points and still sitting in the voids, which meant a poultice rather than a stronger steam setting. The brick took the same medium at a shorter dwell.
The poultice went on late in the day so the dwell ran overnight, covered and secured because the podium is crossed constantly. It came off before the offices filled, and the surface was left to dry before assessment rather than judged wet. A faint shadow stayed in the deepest voids, photographed and left, because reaching it meant working aggregate that cannot be put back.
What You Are Given Afterwards
Photographs before and after from a single unchanging position. A note of each surface with its method, dilution, dwell and standoff, which on designated fabric is evidence rather than paperwork. An honest description of anything remaining and from how far away it reads. And an invoice specific enough to recover.
Removing It Against Painting Over It
On pick-hammered concrete there is no argument: paint is not a treatment this surface has ever carried, it fills the texture that sheds water, and on a Grade II* elevation it is an alteration rather than a repair. On brick and render the calculation is the familiar one, where paint over a mark repeats every time and thickens each round until the detail beneath stops reading. What delay costs instead is set out under hidden costs of not removing graffiti promptly.
Nearby Areas We Also Attend
We work across the City and central London, including Farringdon, Old Street, Shoreditch, Holborn, Hatton Garden, Spitalfields, Aldgate, Islington, King's Cross and Canary Wharf.
Aldersgate Graffiti Removal: Frequently Asked Questions
Can exposed concrete be cleaned safely?
Yes, with heat or contact time and nothing abrasive. The aggregate is held in the face rather than bonded to it, so anything with force behind it takes stones out permanently.
Why can a patch not simply be re-hammered?
Because the original depth was judged once against the structure and there is no second allowance. Over-hammering weakens the concrete, so the finish cannot be redone locally.
Is the landscape really listed?
Yes. The gardens, courtyards, squares, canals and built-in plant boxes are treated as an architectural component, and Roman wall remains and churchyard gravestones are incorporated into it.
How do I know which surface I am looking at?
Ask whoever holds the building record before instructing anybody. On a designated estate that ten-minute call decides whether the work is ordinary or consented.
Why does a poultice take so long?
Because it works by contact time rather than force. The staining has to migrate out of the substrate into the medium, and on porous concrete that means hours and frequently a second application.
Is a second application charged separately?
Not where the method always needed one. On this substrate two applications is normal, and a quotation assuming one has priced a different job.
Can you work overnight?
Yes for wet and gel methods. Not for dry ice in a residential courtyard, because the nozzle is loud and the sound reflects off the blocks.
Does anybody need to be there?
No. The van is self-sufficient for water and power, draws nothing from the building, and public liability evidence goes out before the visit rather than on request.
Is dry ice always more expensive?
Per hour, yes, because the pellets are consumed continuously. Per job it is frequently cheaper on small awkward areas, because there is no containment to build and no drying to wait through.
Somebody already tried to scrub it. Does that matter?
On exposed aggregate, more than the original mark. Abrasion leaves a patch that reads lighter and rougher than the surface around it and cannot be reversed.
Who pays on a leased shopfront?
It turns on the lease, and the fascia is frequently the line. Establishing that before anybody quotes saves a fortnight.
Will steam mark the concrete?
Not at a correct standoff. Held too close, even low pressure concentrates enough to work the aggregate, which is exactly what the trial patch establishes.
Can several frontages be done in one visit?
Yes, and it is the largest saving available. Agents and operators with a run of addresses should ask for it priced as one attendance.
Should I have a coating applied?
Not on designated fabric without consent, and not on porous concrete unless the system is permeable. On a repeatedly marked modern surface it can be worth it, after a proper clean.
What is left in writing?
Photographs from a fixed point, a note of each surface with method, dilution, dwell and standoff, and a plain statement of anything remaining.
Concrete, Roman masonry, lime-mortared brick and dressed stone all sit within a few hundred metres here, and what protected fabric requires of a cleaning method is set out under graffiti on historic buildings in London.
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