Fire Safety Performance Of Facade Systems In High-Rise Buildings: An Analytical Investigation

The fire safety of façades is a critical component of high-rise building safety. Modern façade systems provide important architectural and environmental benefits, but the incorporation of combustible cladding, polymeric insulation and ventilated cavities can create pathways for rapid external fire spread. The reviewed literature indicates that façade fire behaviour results from the interaction between material properties, cavity geometry, ventilation, fire exposure, wind, façade openings, joints and fire barriers. Experimental studies have demonstrated that chimney effects can significantly increase burning characteristics, while numerical investigations have highlighted the influence of cavity dimensions, barrier arrangements and material combustibility. The central conclusion of this research is that façade fire safety should be assessed at the system level rather than solely at the individual-material level. A façade may contain a non-combustible external surface while still incorporating combustible insulation, membranes or adhesives. Conversely, a carefully engineered system can incorporate materials with limited combustible content while maintaining acceptable fire performance when designed, tested and installed appropriately. For Indian high-rise construction, NBC 2016 provides an essential regulatory framework, but effective fire safety also requires detailed engineering evaluation, appropriate material selection, system-level testing, effective cavity barriers, active fire protection and continuous inspection. Future research should combine experimental façade fire testing, FDS/CFD modelling, machine-learning-based risk prediction and field inspection data to develop a quantitative façade fire-risk model specifically applicable to Indian climatic, construction and regulatory conditions.

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