HYGEN KLINX

Evidence dossier · Building Entry Hygiene

Entry transition zones: why location matters

An entrance barrier is not only an object; it is also a location in the circulation path. Controlled studies of footwear-change zones show that moving the transition point can also move the peak of floor contamination.

Published 16 October 2026 · Source-based reading
Transition zone at a modern entrance with an entry mat and illustrated particles along the walking path.
Circulation sequence and transition location are part of entrance design.
Why it matters

The most direct evidence comes from healthcare settings and should not be copied automatically into hotels, offices or residences. The design principle is still useful: defining where transition occurs helps organise barriers, maintenance and circulation.

DESIGNING THE TRANSITION POINTHow to read the process
01Arrival

People and footwear bring material from the preceding route.

02Transition

A defined point separates the external and internal zones.

03Concentration

Transfer tends to be greater near contact and change points.

04Management

Cleaning, layout and barriers can focus on the highest-load area.

A study physically moved the footwear-change point

In a corridor leading to an operating-theatre suite, researchers measured floor bacterial contamination relative to the location where footwear was changed. The contamination peak occurred near the change zone.

Moving the transition moved the peak

When the footwear-change point was moved further from the cleaner area, the contamination peak moved with it. In that setting, contamination decreased in the protected zone. This was a specific result from a controlled healthcare environment.

Simply adding a barrier is not enough

Other healthcare studies have produced mixed results for shoe covers, dedicated footwear and street shoes. This shows that the device alone does not determine performance: route, compliance, maintenance and floor conditions also matter.

Translating the principle to ordinary buildings

For non-healthcare buildings, the lesson is not to copy hospital protocols. It is to create a readable sequence: outdoors, interception zone, optional treatment point, then interior. The more intuitive the flow, the easier it is to operate and maintain.

Maintenance should follow the real load

If dirt and moisture concentrate within the first few metres, that zone needs materials, drainage, cleaning and inspection suited to its traffic. Randomly distributed barriers can undermine operations even if each component is individually sound.

Why this matters for Building Entry Hygiene

The threshold becomes a functional micro-zone of the building. Any active or passive system needs to be integrated into circulation rather than added as an isolated object.

Sources & evidence

  1. Hambraeus et al., 1984 — Bacterial contamination of an operating-theatre corridor and footwear-change location
  2. Footwear practices and operating room contamination
  3. The influence of different footwear on floor contamination
The cited evidence comes from healthcare settings and measures bacterial floor contamination. It cannot be transferred directly to residential or commercial buildings without dedicated testing.