Getting Chewing Gum Off a Shop or Pub Frontage

Gum is the one thing on a commercial frontage that a normal wash will not touch, and it is usually the thing that makes a frontage look worst.

Why water does not work

Gum is a synthetic polymer base. It does not dissolve in water and it does not soften in it. Trodden flat onto a rough surface, it keys into every pore and hollow in the top millimetre of the stone, so there is nothing for a jet to get behind.

Turning the pressure up does not help either. What you get at close range on a soft surface is a spot where the gum has been driven further in and the stone around it has been eroded lighter, so you have swapped a grey disc for a pale halo. On old York stone or soft concrete flags that damage is permanent.

What does work

Three approaches, and which one suits depends on the surface.

Heat and steam. Softening the gum until it releases, then lifting it. Slow but gentle, and the right answer on anything old or soft. A steam unit is genuinely the correct tool for gum on historic paving.

A gum-specific freeze or solvent product. These either make the gum brittle so it can be chipped away, or break the polymer down enough for a rinse to take it. Fast on hard modern surfaces like concrete flags and granite setts. Not something to apply near planting without care.

Focused nozzle at short dwell, hard surfaces only. On concrete or granite, a rotating nozzle held correctly will lift gum without marking the surface. It is the quickest method and the only one that puts the surface at risk if the operator is careless, so it belongs on hard-wearing surfaces and nowhere else.

In practice a bad frontage gets a combination: product on the worst, mechanical on the rest.

Why it gets priced on its own

Because it is time, not area.

Ordinary frontage washing is bought by the square metre or by the visit. Gum is bought by the piece, at roughly a minute each once you include locating it, treating it and coming back to lift it. A pub doorway with two hundred pieces trodden in is over three hours before anything else has been cleaned.

Burying that in a square metre rate does one of two things: either the price looks mad for the area, or the gum quietly does not get done properly. Pricing it separately means you can see the number and decide.

Quite often the sensible decision is to do the gum in the first three metres from the door, where people actually stand and look, and leave the outer edge. That halves the count on most frontages.

Keeping it from coming back

There is no coating that stops gum sticking to paving, whatever gets claimed for sealers. Sealing a frontage makes gum marginally easier to remove next time because it cannot key as deeply, and that is the honest extent of it.

What actually reduces gum is a bin at the door and a short cycle. Gum that has been down a fortnight comes off far faster than gum that has been down two years and gone hard and grey. On a busy frontage, two or three visits a year keeps the count low enough that gum stops being a separate line on the invoice at all.

I cover frontages, entrances and smoking areas across East Sussex. The forecourt page sets out how a visit runs around opening hours.