Façade fire performance: what the UAE code requires

A façade isn’t simply a decorative outer skin. The materials and, critically, the core within composite systems can dramatically influence fire development and vertical fire spread. Beyond conventional masonry units such as brick, clay tile and concrete walling, contemporary architecture increasingly relies on sandwich panels, composite panelling systems and architectural glazing. Within composite metal cladding and sandwich panel configurations, the core insulation material serves as a critical factor in fire dynamics, frequently accelerating vertical flame spread and intensifying structural damage.

The United Arab Emirates (UAE) has historically experienced several high-rise building fires where combustible exterior cladding facilitated rapid, vertical fire spread, thereby extending emergency response times and complicating firefighting operations. Notable historical incidents include the iconic 2015 New Year’s Eve fire at the Address Downtown Dubai, the November 2012 Tamweel Tower fire in Jumeirah Lakes Towers (JLT), and the 2020 Abbco Tower blaze in Sharjah, alongside more recent events such as the June 2025 fire at the 67-storey Marina Pinnacle (Tiger Tower) in Dubai Marina. To mitigate these hazards, the UAE Fire and Life Safety Code of Practice (2018 Edition) introduced comprehensive regulations detailing the required reaction-to-fire classifications and fire-resistance ratings for building envelopes based on specific occupancy types. These provisions are strictly enforced through standardised, large-scale testing protocols. Fully implementing this framework (which originally evolved from the baseline 2011 code) is essential to reducing the incidence and severity of façade fires, minimising both structural losses and risks to human life.

In this article, you will see performance metrics such as A1, A2, B, s1, and d0 referenced in the criteria for evaluating the reaction-to-fire classification of a material. What these criteria signify and their exact roles in overall fire safety designations are explained below. Under the EN 13501-1 classification system, these codes strictly define reaction-to-fire performance at the material level: the primary designations (A1 to F) rate a substance’s inherent combustibility, where A1 and A2 represent non-combustible or limited-combustible materials, and B through F indicate combustible materials ranging from a very limited fire contribution (B) to high flammability. This is accompanied by secondary metrics evaluating the material’s hazards during ignition, including smoke emission classification (s1 for low or absent smoke up to s3 for high volume) and flaming droplets/particles classification (d0 for no burning debris up to d2 for high dripping). Conversely, fire-resistance ratings apply to the entire integrated multi-layer system. While a single layer’s reaction-to-fire classification evaluates its ignition tendencies, a structural envelope’s fire-resistance rating measures (in hours or minutes) how effectively the complete, built assembly contains flames and prevents thermal transmission between floor levels. By thoroughly outlining the separate material test criteria and system-wide assembly configurations mandated by the UAE Fire and Life Safety Code of Practice, this study highlights the critical importance of manufacturing and installing fully certified, fire-rated building envelope systems.

Aluminium Composite Panel – Metal Composite Material (ACP – MCM)

Common across various engineering sources, cladding panels are defined as non-loadbearing façade elements mainly employed for protective and aesthetic purposes. Clause 4.6.2.1 of the UAE Fire and Life Safety Code of Practice defines a Metal Composite Material (MCM) as a factory-manufactured panel consisting of metal skins bonded to both faces of a core, mandating that all MCMs be tested and approved at their maximum intended thickness and within their specific intended configurations.

Crucially, Table 1.14.a clarifies a fundamental regulatory reality: standalone MCM or Aluminium Composite Panels (ACP) are not inherently fire-resistance-rated systems on their own, nor do they contribute to the load-bearing framework of a building. To bridge the gap between individual component behaviour and full architectural safety, the Code implements a strict dual-testing methodology composed of Test 1 (Component Level) and Test 2 (Assembly Level).

The practical significance of this framework is that a product’s individual classification alone does not demonstrate regulatory compliance.

• Test 1 establishes the baseline reaction-to-fire performance of the standalone product. For super high-rise (above 90 metres) and high-rise buildings (23 to 90 metres), Test 1 requires an EN 13501-1 reaction-to-fire classification of A1 or A2-s1, d0, alongside a minimum self-ignition temperature of 343°C under ASTM D1929. For mid-rise (15 to 23 metres) and low-rise structures, this requirement eases slightly to a B-s1, d0 classification.
• Test 2 evaluates the composite product as an integrated element within the proposed wall assembly. Regardless of building height, the entire engineered façade system (including insulation, cavity barriers, framing and fixings) must successfully pass a large-scale system test (such as NFPA 285 or BS 8414).

Ultimately, even if an ACP possesses an exemplary A2 reaction-to-fire classification under Test 1, the proposed façade construction will fail compliance if the collective system fails to contain flame spread during Test 2. True compliance demands that materials not only restrict ignition individually but also perform safely as a unified assembly.

Table 1.14.b.: MCM and ACP on Fire Resistance Rated Exterior Wall Coverings – Test Requirements evaluates the requirements based on the fire resistance rating of the exterior wall. In this case, buildings are not classified according to height or building type.

Sandwich Panels (specifically for warehouses and factories)

Sandwich panels are primarily preferred because they are lightweight, which reduces structural loads and speeds up installation, cost-effective by combining cladding and insulation into a single material to save time and labour, and capable of delivering high thermal and acoustic insulation performance. Clause 4.9.4.1. defines sandwich panels as foam plastic insulated sandwich panels (FISP), mineral core insulated panels, or self-supporting double-skin metal-faced insulating panels.

The UAE Fire and Life Safety Code of Practice features three primary reference tables: Table 1.17.a, Table 1.17.b, and Table 1.17.c. These tables are structured according to the occupancy and type of the buildings, delineating the specific parameters for both Test-1 (as product) and Test-2 (in wall assembly). Once the building type and occupancy hazard are determined, a critical distinction must be made regarding the substrate: whether the sandwich panel is installed over a Non-Fire-Resistance-Rated and Non-Load-Bearing Exterior Wall Covering assembly or over a Fire-Resistance-Rated Exterior Wall assembly. This structural distinction dictates the mandated testing methodologies and their respective performance criteria. For sandwich panels mounted on a Fire-Resistance-Rated Exterior Wall, the code provides a unified, singular classification encompassing ‘any building with any height, and any occupancy’, thereby consolidating all structures into a single compliance pathway.

To illustrate, consider a healthcare occupancy (hospital) where the sandwich panel is installed over a non-fire-resistance-rated substrate. Under Table 1.17.a, the individual product specification (Test-1) dictates a reaction-to-fire classification of Class A or A2-s1, d0 in accordance with EN 13501-1. Concurrently, the large-scale system assembly configuration (Test-2) must successfully satisfy the fire propagation parameters of either BS 8414, NFPA 285, FM 4881, or ISO 13785. Conversely, if the system is installed over a fire-resistance-rated wall substrate, the Test-2 provisions shift fundamentally. In this scenario, hourly endurance testing under ASTM E119, UL 263, EN 1364-3, or EN 1364-4 (it appears as EN 1362 in the UAE Code; however, since EN 1364 is the correct standard, that version has been used in the article) be executed to secure valid fire-resistance ratings. Consequently, identifying both the specific occupancy profile and the fire-resistance status of the underlying perimeter wall assembly is paramount to achieving code compliance.

Beyond standard envelope configurations, sandwich panels are subject to specialised testing requirements dictated by distinct applications, such as cold storage facilities or roof assemblies (both sprinklered and non-sprinklered). These systems are ubiquitous in industrial facilities, making their empirical test data highly critical. For instance, under the specialised conditions detailed in Table 1.17.c, sandwich panels utilised as cold storage walls must achieve a reaction-to-fire rating of Class B-s1, d0 per EN 13501-1, or alternatively, secure approval under FM 4880 with a certified ‘non-combustible core’ pass criterion.

Furthermore, the presence or absence of an automatic fire sprinkler system directly alters the compliance matrix for sandwich panels integrated into roof assemblies. While the material-level Test-1 protocols remain uniform across both scenarios, the wall assembly evaluation under Test-2 enforces substantially more stringent pass/fail benchmarks for non-sprinklered roof assemblies to compensate for the lack of active fire suppression.

(Adapted from the tables in the UAE Fire and Life Safety Code of Practice)

(Adapted from the tables in the UAE Fire and Life Safety Code of Practice)

Summary and guielines

Besides low-rise, medium-rise and high-rise buildings, composite panels and sandwich panels are frequently used in factories and warehouses. The importance of choosing the right materials has been highlighted once again in the façadefires that occurred in previous years. Using filler material with a low fire resistance rating or the absence of a wall behind the panels increases the extent of potential damage. The use of firestops, fire walls and compartmentalisation is also crucial. The panel (as a product) must have a reaction to fire rating of at least B, s1, d0 under specific, prescribed conditions.

It has been observed that in certain specialised applications (such as depending on the intended use of the building), Class B is not even considered sufficient, and Class A1 to A2 requirements are mandated. Such structures include super high-rise buildings (exceeding 90m in height), high-rise buildings (between 23m and 90m), shopping malls, schools and hospitals. In these facility types, deploying fire-rated products with negligible contribution to fire (specifically those classified as Class A1 or A2-s1, d0 in accordance with EN 13501-1) is essential to maximise occupant evacuation time, mitigate fire spread and control vertical fire propagation within the building.

It is clearly known that materials with lower reaction-to-fire properties, such as polyurethane and polyisocyanurate, can ignite due to arcs from electrical installations passing through the panels or from cigarette butts. For this reason, assessing individual product performance is insufficient; rather, the specific product must be tested as part of a complete assembly in configurations that accurately replicate the intended application and field conditions. Prioritising the fire performance of the entire system assembly over isolated material characteristics is critical, as fire propagation is inherently governed by the interaction of all system components.

The report revealed that by asking the right questions and gathering the necessary data regarding the structure, it is possible to determine the appropriate fire resistance class for the material. Five fundamental questions have been created and listed below; based on the answers to these, the relevant page and table in the UAE Fire and Life Safety Code of Practice document should be consulted.

• What is the specific type of façade cladding material or panel product intended for use (e.g., MCM/ACP or sandwich panel)?
• What is the building’s occupancy type, use and total height?
• Will the panel be installed over a ‘fire-resistance rated exterior wall’ or a ‘non-fire resistance rated’ wall assembly?
• If a sandwich panel is being used, what is its exact function and location within the building envelope (e.g., exterior wall, interior partition or roof covering)?
• Will there be any supplementary thermal insulation material installed behind the cladding panels within the cavity?