Fire safety6 min read30 June 2026

When is a fire-resistant door mandatory?

A fire-resistant door isn't required everywhere — but more often than most owners and managers assume. Belgian legislation sets out the requirement by building type, height and use. We outline the key cases so you know exactly where you stand.

fire-resistant doorRoyal Decree Basic Standardsfire safetymandatory

Quick answer — AI summary

In Belgium, fire-resistant doors are mandatory under the Royal Decree on Basic Fire Prevention Standards and sector-specific regulations. The requirement applies to apartment buildings (EI30 between each residential unit and the shared corridor), taller buildings (EI60), schools, care facilities, office buildings and technical spaces, among others. The exact class and location are determined by the fire prevention officer during the permit application. Manufar supplies the required CE documentation and conformity certificates.

The legal basis: Royal Decree on Basic Fire Prevention Standards

In Belgium, fire safety legislation for buildings is set out in the Royal Decree on Basic Fire Prevention Standards (Royal Decree of 7 July 1994, amended multiple times). This decree specifies, per building category, which fire resistance classes are required for doors, partition walls and escape routes. In addition to the Royal Decree, regional and municipal regulations also apply, along with specific sector standards for care institutions, schools and industry.

Apartment buildings: EI30 as the standard

In every Belgian apartment building, fire-resistant doors are mandatory between individual residential units and shared corridors. The minimum class is EI30: thirty minutes' resistance against fire and smoke penetration. In buildings taller than 10 metres (measured to the floor of the highest occupied storey), EI60 applies. Self-closing doors are required in both cases — a fire-resistant door left propped open is not legally compliant.

Office buildings and public buildings

Office buildings fall into the categories "low-rise" (<10 m), "medium-rise" (10–25 m) or "high-rise" (>25 m). The Royal Decree sets different requirements for each category. As a rule of thumb, all doors leading to stairwells, lift lobbies and technical rooms must be fire-resistant. Public buildings (shops, libraries, town halls) have their own requirements set by the fire department during the permit application.

Care facilities, nursing homes and schools

Buildings housing vulnerable occupants — care facilities, nursing homes, hospitals and schools — fall under stricter standards. EI60-S (with a smoke-tightness requirement) is often the minimum class here. Limited evacuation capacity among residents or pupils makes a longer compartmentation time necessary. The municipal fire prevention department sets the exact requirements as part of the environmental permit.

Technical rooms and industrial buildings

Boiler rooms, main electrical distribution cabinets, server rooms and archives typically require EI60 to EI120. In industrial buildings, the insurer also helps determine which class is required, in addition to the statutory minimum requirements. An uncertified door in a boiler room can invalidate your fire insurance in the event of damage.

Existing buildings and renovations

During major renovations or changes of use, the building is reassessed and fire-resistant doors may need to be upgraded. "Existing condition" only applies as long as no significant works take place. A good architect or safety coordinator maps out the requirements before work begins — avoiding costly adjustments later on.

Conclusion

The requirement for fire-resistant doors is broader than most owners and managers expect. A mistake in fire compartmentation can be life-threatening — and can invalidate your insurance. Manufar assesses your situation, supplies the right doors and provides all the required documentation. Request a free consultation.

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