One area of the glazing has gone opaque and no amount of cleaning brings it back. The appearance is of frost across a single patch while the remainder of the panel is untouched. If a blade has been used on it since, scoring will now sit over the top of what was already there.
This is acid etched graffiti. Gel of a corrosive kind has been in contact with the panel long enough to attack it, and the surface now left behind is disrupted finely enough that light scatters off it rather than travelling through. Nothing has been deposited that could be washed away. The damage is to the glass itself.
The panel is worked on where it stands, usually finished inside the day, with nothing screened off and no unit to be made first, for a small proportion of replacement cost.
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Listed Does Not Only Mean Georgian
Most people hear that a building is protected and picture sash windows and painted joinery. Swiss Cottage is the district that corrects that assumption, and it matters because the wrong assumption leads to the wrong repair.
The civic buildings around the open space here belong to the middle of the twentieth century, and the significant ones are protected on exactly the same statutory basis as anything Georgian. Where a building of that period is listed, the protection commonly extends to its glazing and its framing, because in a modern building the glass is not a component fitted into an opening, it is a large part of the architecture itself.
That produces three practical consequences that a contractor used to period stock will not anticipate.
The framing is slender and original. Post-war curtain walling and window systems used thin metal sections that are no longer manufactured in the same profiles. Disturbing them to take a pane out is not a routine glazing operation, and refitting to match is harder than it sounds.
New glass does not look like old glass. Modern float differs from mid-century glass in thickness, in tint and in the way it reflects. In a long repeating elevation of original panes, one replacement reads differently from a considerable distance, and a conservation officer is quite likely to say so.
And consent is a real question. Altering a listed building can require consent, and work done without it is an offence rather than a procedural failing. Replacing a pane in a listed modern elevation is exactly the sort of intervention where that question arises.
Restoration sidesteps all three. The pane is not removed, the framing is never disturbed, the original glass is retained so the elevation stays consistent, and because nothing is altered there is no application to make. On protected twentieth century fabric that is not merely the cheaper route, it is usually the only straightforward one.
Recent Acid Etched Graffiti Removal Projects
You Cannot Park On The Finchley Road
The second Swiss Cottage particular is access, and it is the thing that most often derails an attendance here.
Finchley Road is a major arterial carrying several lanes of traffic through the district, with stopping restrictions along its length and a gyratory at the centre. A contractor cannot simply pull up outside a frontage, unload and start work, and anybody who has quoted on the assumption that they can is going to have a difficult morning.
We plan for it rather than discovering it.
Equipment is brought in rather than worked out of a vehicle at the kerb. That adds time at the start and end of the job and it is built into the quotation instead of appearing as an extra.
Timing is chosen around the traffic rather than the trade. On the arterial frontages the practical windows sit outside peak flow, which on a road like this is a narrower set of hours than most people assume.
Side street premises are a different proposition entirely. On Belsize Road, Winchester Road and the residential approaches, access is ordinary and the constraint reverts to trading hours and residents above.
Tell us which of those you are and the answer on timing changes completely.
Seen At Thirty Miles An Hour
There is a further consequence of fronting an arterial road that is worth stating, because it changes what good enough means.
A shopfront in a village high street is examined at walking pace from two metres away. A frontage on the Finchley Road is seen mostly by people in vehicles, at speed, from across several lanes. Fine detail disappears at that distance, but large pale areas do not, and a clouded panel on a big elevation reads clearly from the far side of the road.
The flip side is that damage here is reported later than elsewhere. Passing drivers do not stop to tell you, and there is far less casual pedestrian footfall than a shopping street generates, so a marked panel on an arterial frontage can stand for a fortnight before anybody mentions it. On these buildings a deliberate look at the elevation from the opposite pavement, occasionally, is worth more than relying on someone to report it.
Where We Get Called Out Around Swiss Cottage
Finchley Road. The arterial route and the bulk of our work here, with large retail frontages, the shopping centre and long ground floor elevations facing several lanes of traffic.
The civic buildings around the open space. Library, theatre and leisure frontages, with the protected twentieth century glazing described above.
Adelaide Road and Eton Avenue. Mixed commercial and institutional frontage, with educational premises and converted stock among them.
Belsize Road and Winchester Road. Smaller parades and independent premises on ordinary streets, quiet once they close.
The station approaches and the gyratory. Concentrated pedestrian flow at the centre, with the frontages nearest the entrances taking the heaviest exposure.
Fitzjohn's Avenue and the southern approach. Professional premises, consulting rooms and converted villas set back from a wide road.
College Crescent and the streets behind. Residential blocks and mixed premises where damage regularly goes unnoticed because nobody customer facing is watching the front.
Replacing Or Restoring
| Fitting a new pane | Restoring the existing pane | |
|---|---|---|
| Listed twentieth century glazing | Slender original framing disturbed, consent likely | Framing untouched, nothing to apply for |
| Matching an original elevation | Modern float reads differently in tint and reflection | The original glass is retained |
| Arterial road access | A vehicle and a crew at a kerb you cannot stop on | Equipment carried in, short working window |
| Timescale | Weeks once consent and glazing are arranged | Usually a single visit |
| Large elevations | Each panel surveyed and ordered separately | Panels treated in sequence on one attendance |
| Meanwhile | A boarded panel on an elevation seen from across the road | Nothing covered at any stage |
| Cost | Glass, framing work, consent process and access | Up to 90 per cent less |
The cost comparison is set out at glass replacement vs protection: the true cost, and the decision at should I replace or restore etched graffiti glass.
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
Three Kinds Of Damage
They resemble each other from a distance and each takes a different route.
Paint or marker is a deposit sitting on the panel. Opaque, hard edged, and a fingernail climbs onto it. Solvent removes it and the glass beneath is untouched.
Acid etching has gone into the surface. Pale and clouded while light still passes through, with a faint coarseness level with the glass around it. It fades out at the boundary rather than stopping cleanly, because the gel kept moving until something halted it. Against a lit interior it shows up far more than it does from the road.
Scratching is gouged into the pane. Bright rigid furrows from a blade, a stone or a key, that stop a fingernail dead.
There are photographs to check yours against at glass scratching vs acid etching, with more on the clouded appearance in white frosty window graffiti. On how widespread this has become, see the rise of acid-etch vandalism in London.
The First Hour
Any gel still present remains corrosive. It harms skin and eyes, so nobody handles it, and on a public building the affected section needs cordoning rather than a warning being passed to staff.
Nothing sharp, nothing abrasive. A blade puts permanent lines into a panel that was entirely recoverable, and wiping wet gel carries the damage onto panels that had none.
Proprietary removers achieve nothing. There is no coating for them to dissolve, and on original twentieth century glazing an unknown chemical is a risk not worth taking.
Rinse with plenty of clean cold water where residue is visible and it is safe, gloved and with eye protection, letting it drain rather than spreading it about.
Photograph every affected panel, dated, from outside and inside, and take one from across the road as well. On a large elevation that distant shot is what shows how the damage actually reads to the people who see it.
Report it as criminal damage. The reference will be wanted before an insurer engages. We have written out what to do and when at what to do when your shop window is vandalised.
How The Work Is Carried Out
Establishing the glazing and its status. Plain float, toughened, laminated, coated, mirrored or a sealed unit, the age and type of the framing, whether the building carries a listing, and how far the acid has travelled. On protected modern fabric that first question shapes everything after it.
A concealed trial. The method is proved on a small section out of public view before the full panel is committed to.
Masking and containment. Framing, gaskets, seals, manifestation and signage are protected, with particular care around slender original sections that will not tolerate rough handling. Slurry is contained and kept off the paving and away from the carriageway.
Through the abrasive grades. Each stage finer than the last, removing a thickness of glass the eye cannot register, and taking the treated zone well beyond the mark so it disappears rather than stopping at a line. Restrict it to the tag and a shallow lens is left in the panel, and on a large flat elevation viewed from a distance that distortion is exactly what catches the eye.
Cerium oxide to finish. Whatever cloudiness survives the abrasion is taken out wet with cerium oxide, and we judge it standing where the light comes through the panel towards us.
Assessed at the viewing distance. On an arterial frontage the final check is made from the opposite pavement as well as close up, because that is where most people will see it from.
A single panel is normally complete within three hours, with longer elevations sequenced across the access windows available. The grinding stage is documented at acid etched graffiti techniques and removal methods, the polishing at how to polish shopfront glass to optical clarity, and the equipment at acid etched graffiti removal equipment and materials.
Where restoration is not viable we say so at the assessment. A burn of exceptional depth, a unit whose seal had already failed, or a coating occupying the surface we must abrade each mean the panel genuinely needs replacing, and that conclusion is issued in writing before any commitment.
Work Completed In North London
- Acid etched graffiti removal in Hackney
- Emergency acid etched graffiti removal in Dalston
- Acid etched graffiti removal in Farringdon
- Acid etched graffiti removal on Bond Street
What We Restore Around Swiss Cottage
- Original twentieth century curtain walling and window systems in protected buildings.
- Laminated shopfront and lobby glazing on the Finchley Road frontages and the shopping centre.
- Float and older window glass in parade shopfronts and converted villa frontages.
- Toughened glass in entrance screens, automatic doors, balustrades and shelters.
- Large single panels on arterial elevations, treated in sequence.
- Sealed units in modern openings, treated purely from outside.
- Mirrors and mirrored panels in foyers, leisure facilities and retail interiors.
- Obscured and patterned glass in surgeries and treatment rooms, matched back to the finish it had.
- Glass block in service elevations and lightwells.
- Entrance thresholds in polished granite or polished marble, and polished metal on handrails, framing and door furniture.
Nothing with a finished surface escapes the same gel, and on a modern elevation the metal framing between panels is marked as readily as the glass. Both are dealt with in one attendance.
Who We Work For In Swiss Cottage
Civic and cultural estates teams. Protected twentieth century buildings, where restoration avoids a consent question a replacement would raise.
Retail and shopping centre operators. Long arterial frontages, worked around the traffic rather than the trade.
Educational premises. Attendance arranged around the timetable, with method statements supplied beforehand.
Independent traders on the side streets. Belsize Road, Winchester Road and the small parades, worked around trading hours.
Managing agents and block managers. Communal entrances and stair glazing in the residential blocks, quoted for service charge recovery.
Who Carries The Cost
On a civic or institutional building the estates team holds the fabric and instructs directly. What they generally need alongside a price is a written description of works and dated photography, because spend on a protected building has to be evidenced properly rather than approved informally.
On a leased commercial unit the repairing covenant decides in the usual way, with the shopfront normally inside the demise and the communal entrance, lobby and envelope outside it. On a converted building the boundary is seldom obvious, so the demise plan repays reading.
On insurance, compare our figure with the excess before anything is notified. Restoring a single panel will often come in underneath, and a claim paying out nothing still registers at renewal. Several panels along a long elevation generally justify going ahead. The dated photographs and the written record of works accompany every job regardless.
Reducing The Chance Of A Repeat
Restoring the panel deals with what has happened and nothing further. It discourages nobody, and an arterial frontage with little passing footfall is watched by almost no one after dark.
Protective film goes over the outside face for one purpose: the film absorbs the next attack in place of the pane. Taking it off and putting a new one on is quick and costs a small proportion of another restoration. Across a long ground floor run the arithmetic builds up, since without it you are restoring the same reachable panels over and over.
On a listed building it needs raising with the local authority before anything is fitted, since applying a film changes the appearance of protected fabric, and on original twentieth century glazing the product should be chosen so that the reflectivity of the elevation is not altered. That is a short conversation and far better had first.
It is documented end to end at anti-acid etched graffiti protection, which explains the idea of an expendable outer surface, its service life once fitted, what installation runs to and whether the finished glazing reads differently. There is separate advice for shop windows at protecting retail displays from glass vandalism.
Areas We Cover Next To Swiss Cottage
- Belsize Park
- Hampstead
- Frognal
- West Hampstead
- St John's Wood
- Primrose Hill
- Camden Town
- Kilburn
- Maida Vale
- Childs Hill
The whole service, with our process video and the full question set, is on the main acid etched graffiti removal page.
Swiss Cottage Acid Etched Graffiti Removal: Frequently Asked Questions
Our building is listed but it is from the 1960s. Does that count?
It counts exactly the same. Protection has nothing to do with age or style, and on a modern listed building the glazing and its framing are frequently part of what is protected, because in that architecture the glass is not a component in an opening, it is a large part of the design.
Why not simply replace the damaged panel?
Because the framing is slender, original and no longer made in the same profiles, modern float will not match the panes around it in tint or reflection, and altering a listed building can require consent. Restoration avoids all three.
Can you work on Finchley Road when there is nowhere to park?
Yes, by bringing the equipment in rather than working out of a vehicle at the kerb, and by choosing a window outside peak flow. It adds time at each end and that is in the quotation rather than added later.
Why did nobody report the damage sooner?
Because an arterial frontage has very little casual footfall and the people who do see it are driving past. A panel can stand marked for a fortnight before anybody mentions it, which is why an occasional deliberate look from the opposite pavement is worth the minute it takes.
How should we photograph it?
Close up from outside, from inside, and one from across the road. That distant shot is the one that shows how the damage actually reads to the people who see it.
Can the panel be restored or does it need replacing?
Restored, in the great majority of cases. The acid reaches only a fraction of a millimetre in, and the work removes that fraction evenly and polishes the clarity back. Only three things rule it out: a burn that has gone exceptionally deep, a seal that had already failed, or a coating occupying the surface we would need to abrade.
Will the framing be disturbed?
No. Nothing comes out and nothing is unfixed. On original slender sections that is the whole point, because refitting them to match afterwards is considerably harder than it looks.
Several panels on one elevation are marked. How is that priced?
Panel by panel, with the attendance charged once. Where the run cannot be finished in a single window we sequence it and prioritise the panels most visible from the road.
Do we need to close or board up?
Neither. Nothing leaves the frame at any point, so the elevation stays whole and the building carries on as normal.
Will the treated area be visible?
It should not be. The work is carried well past the damage and faded out so no boundary remains, and the final check is made from the viewing distance rather than only at arm's length. A poor finish leaves a shallow lens in the panel, which on a large flat elevation is exactly what the eye picks up.
There is scratching as well as etching.
Both together in a single visit, because the graded abrasion and finishing polish that lift an etch lift a score as well. How deep the damage runs is the only genuine limit.
What about the metal framing between panels?
Marked as readily as the glass on a modern elevation, and recoverable. Metalwork is dealt with alongside the glazing rather than left to another trade.
Can we fit protective film on a listed building?
Possibly, but raise it with the local authority first, because applying a film changes the appearance of protected fabric. On original twentieth century glazing the product also needs choosing so the reflectivity of the elevation is not altered.
We need the spend evidenced for our records.
Every job comes with a written description of works and dated photographs from both faces as standard, which is the format an estates or finance team on a protected building normally needs.
What does it cost?
Against replacing the same glazing, counting the panel, the framing work, any consent process and the access, restoration comes in up to 90 per cent below. The figure depends on the number of panels, the extent and depth, the glazing type and the access. It is confirmed in writing beforehand. No lazy contractors. No hidden fees.
How do we start?
Send photographs including one from across the road, and tell us whether the building is listed and whether you are on the arterial frontage or a side street. Those answers decide the method, the timing and the price.
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
Other London Locations We Cover
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