Marcaspus Cleaning Consultants
Rainham · Romford · Barking · Dagenham · Havering
No deposit — pay after the job · Open 7 days, 7am–9pm
If you have ever noticed a cleaner carrying cloths in more than one colour, that is not decoration. It is one of the simplest and most effective controls in professional cleaning, and it is the reason a properly run contract keeps a washroom clean without ever putting the kitchen at risk.
Why colour matters
The idea is straightforward: different areas of a building carry different levels of risk, and a cloth that has touched a toilet seat should never touch a worktop. Rather than trust every operative to remember which cloth went where, the industry uses colour as a visual rule that removes the guesswork — and makes it obvious to anyone watching whether the standard is being followed.
One cloth used in the wrong place is the single most common way cross-contamination happens on a routine clean.
The four-colour system
The system endorsed by the British Institute of Cleaning Science (BICSc) splits a site into four zones, each with its own cloth colour:
Red — Washrooms and sanitary areas
Toilets, urinals and washroom floors — kept fully separate to stop bacteria transferring elsewhere.
Blue — General areas
Offices, desks, reception, glass and general dusting — the everyday cloth for shared spaces.
Green — Kitchens & food areas
Worktops, sinks and food-contact surfaces — never crossed with washroom or general-area cloths.
Yellow — High-risk & isolation areas
Clinical waste points, isolation rooms and other higher-risk zones needing extra separation.
How we apply it on every contract
Every Marcaspus operative is trained on this system before they attend a site, and it is checked as part of our supervision, not left to memory. On a mixed-use contract — an office with a kitchen and washrooms, for example — that means:
- Cloths, mop heads and buckets are colour-matched and never shared between zones
- Trolleys are stocked with the full colour set before the visit starts
- New starters are checked on the system during their first supervised visits
- Site-specific variations, such as a fifth colour for a clinical area, are agreed in writing before work begins
What to check if you manage a site
If you are responsible for a commercial or communal site, colour coding is one of the easiest things to verify without needing any cleaning expertise yourself. Worth asking your provider:
- Do they follow a documented colour-coding system, and can they show it in writing?
- Are staff trained on it before their first unsupervised visit?
- Is it checked during supervision, not just assumed?
- Do they have a plan for higher-risk areas specific to your site?
Want this standard applied to your site?
CHAS-accredited cleaning with a documented colour-coding system on every contract.
Written by The Marcaspus Team
Cleaning consultants covering Rainham, Dagenham, Barking and the wider East London area.
Our services
Office Cleaning
Contract cleaning for workplaces across East London.
Commercial Cleaning
Site cleaning for retail, industrial and managed buildings.
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