Fire rules decide what a commercial timber project needs. A holiday park, a workspace, a school building or a care setting is assessed by its use, its height and its position, not by its material alone. This guide shows where those rules are set in England, Germany and France, which two properties of a construction they ask for, and what a dealer collects before a project is quoted.
The guide gives no fire ratings of its own: a rating belongs to a tested or calculated assembly. It is an overview for orientation, not fire engineering advice. The sources were read in September 2026.
Two Properties: Reaction to Fire and Fire Resistance
Fire rules ask two different questions about a construction, and the two are often confused. Approved Document B, the guidance for England, describes them in this way:
- Reaction to fire relates to the degree to which a product will contribute, by its own decomposition, to a fire under specified conditions. Products are classified from A1 to F in accordance with BS EN 13501-1, and untested products cannot be classified
- Fire resistance is a measure of resistance to collapse (loadbearing capacity, R), resistance to fire penetration (integrity, E) and resistance to the transfer of excessive heat (insulation, I). It is classified in accordance with BS EN 13501-2
Both are established by test or by calculation for the specific product or assembly. Neither is inferred from a wall thickness.
England: the Building Regulations and Approved Document B
In England the requirements are in Part B (Fire safety) of Schedule 1 to the Building Regulations 2010. They are written as aims, in five parts:
- B1, means of warning and escape: appropriate provisions for the early warning of fire, and appropriate means of escape to a place of safety outside the building
- B2, internal fire spread (linings): the internal linings adequately resist the spread of flame over their surfaces
- B3, internal fire spread (structure): in the event of fire the stability of the building is maintained for a reasonable period
- B4, external fire spread: the external walls and the roof adequately resist the spread of fire over them and from one building to another, having regard to the height, use and position of the building
- B5, access and facilities for the fire service: reasonable facilities to assist fire fighters, and access for fire appliances
How these requirements can be met is set out in Approved Document B, which is published in two volumes: volume 1 for dwellings and volume 2 for buildings other than dwellings. The current text is the 2019 edition incorporating the 2020, 2022, 2025 and 2026 amendments, collated with the 2029 amendments. The amendments make provision for sprinklers in new care homes and withdraw the national classes of fire tests (BS 476), with transition periods; the European standard (BS EN 13501) remains in place. Wales, Scotland and Northern Ireland publish their own guidance.
Approved Document B classifies the uses of buildings in purpose groups, which represent different levels of hazard, and a purpose group relates to the main use of the building. Its section on resisting fire spread from one building to another deals with boundaries and with the unprotected areas of a wall.
Some small detached buildings are exempt from the Building Regulations. Schedule 2, Class 6 exempts a detached building with a floor area of no more than 15 m² that contains no sleeping accommodation, and a detached single-storey building of no more than 30 m² without sleeping accommodation when no point of it is less than one metre from the boundary of its curtilage or when it is built substantially of non-combustible material. A building with sleeping accommodation is not covered by Class 6. More is in the guide to the UK Building Regulations.
Germany: the Building Code of Each Land
In Germany the building code is a law of each Land (Landesbauordnung), so the requirements are read in the code of the Land where the building stands. The Bavarian building code, for example, sorts buildings into five building classes (Gebäudeklassen) by their height and by the number and size of their units (Article 2), and asks that load-bearing walls are fire-retardant (feuerhemmend), highly fire-retardant (hochfeuerhemmend) or fire-resistant (feuerbeständig), depending on the class (Article 25).
The class of a project, and the requirements that follow from it, are confirmed by the architect of the project or by the Bauaufsichtsbehörde. For market context see the Eurodita page for Germany.
France: Buildings Open to the Public
In France a building that is open to the public (ERP, établissement recevant du public) is classified by category, according to the number of people it can receive, and by type, according to its activity. The classification decides the obligations that apply. The approving authority or the fire consultant of the project confirms them.
Other Markets
Every other market has its own building rules. The requirements for a project are confirmed with the local authority or with the fire consultant of the project before the specification is fixed.
Before a Commercial Project Is Quoted
When a commercial project arrives, a dealer collects these points before a model is specified:
- Use and occupancy: who uses the building, whether anyone sleeps in it, and how many people it is designed for
- Size and height: the floor area, the number of storeys and the height
- Position: the distance to the boundary and to other buildings, and the openings in the walls that face them
- Approval route: which authority approves the building, and whether a fire strategy is asked for with the application
- Fire engineer: whether a fire engineer or a designer has been appointed for the project
Detection, Alarm and Sprinklers
Which detection and alarm system a building or a site needs, and whether sprinklers are required, follows from the national rules for the use of the building and from the fire risk assessment. These systems are not part of the timber building kit; they are specified by the project team.
What Eurodita Supplies
Eurodita supplies the timber building kit with its drawings, CAD, specifications and the technical data that is available for the order, such as wall profile dimensions, timber species and the specified build-up. Wall logs are supplied untreated by default, and floor bearers are impregnated as standard. Glulam wall profiles are made in the same factory.
Eurodita publishes no fire rating for its walls. Fire resistance is established by test or calculation for the specific assembly, by the fire engineer of the project or by another external specialist, and the documentation available for an order is confirmed in the written quotation. Send the drawings and the project details through the contact form; further material is in the dealer resources.
Frequently Asked Questions
Do log cabins meet fire safety regulations for commercial use?
They can be specified for commercial projects when the fire strategy, section sizes, openings, protective layers, escape route, boundary condition and local approval route are defined by the appointed project team. Eurodita can provide available product and timber data for fire-engineer, dealer or local-authority review.
What fire rating do timber buildings need in the UK?
There is no single rating for timber buildings. In England the guidance is Approved Document B; Wales, Scotland and Northern Ireland publish their own. Some small detached outbuildings are exempt from the Building Regulations, depending on floor area, sleeping accommodation, construction and distance to the boundary. Where the regulations apply, the fire resistance needed for the structure depends on the building's use, height and whether it is sprinklered, and Building Control or a fire engineer confirms it. Holiday lets also need a fire risk assessment.
Do glamping cabins need fire sprinklers?
Not usually for an individual single-storey cabin, but it is not a blanket rule. Sprinkler requirements in the UK depend on the type of building, its height, occupancy and which nation it is in, and some building types, such as new care homes, have specific rules. For a glamping site, the fire risk assessment and Building Control decide the detection and alarm provision, commonly mains-powered smoke and heat alarms in each unit. Alarms and other electrical work are installed locally and are not part of Eurodita default scope.
How does fire regulation differ across EU countries for timber buildings?
The technical base is shared: EN 1995-1-2 (Eurocode 5) for the structural fire design of timber, applied with each country's National Annex, and EN 13501 for classifying reaction and resistance to fire. The rules that decide what a project needs are national or regional. In Germany building codes are set by each federal state, and France classifies buildings open to the public (ERP) by type and capacity. A local fire engineer or the approving authority should confirm the requirements for each project.
What documentation does Eurodita provide for commercial fire compliance?
Eurodita supplies the drawings, CAD, specifications and available technical data for the timber building, such as wall profile dimensions, timber species and the specified build-up. Fire resistance calculations and the fire strategy are produced by the project's fire engineer or another external specialist, and approval follows the local authority route. Send the drawings and project details through the contact form so the available data can be matched to what your fire engineer needs.