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Fire was triggered by candle sparks igniting soundproofing foam used in the bar.
Investigators have determined the fire at Le Constellation bar was caused by candle sparks igniting soundproofing foam, according to fire analysis reports. The blaze occurred on New Year's Eve and resulted in 41 deaths and 115 injuries in the Crans-Montana establishment.
The discovery of the ignition source adds critical detail to the incident that has already led to criminal charges against bar owners Jacques and Jessica Moretti, municipal officials, and eleven other individuals. The foam's flammability characteristics proved decisive in the rapid spread of the fire, contributing to the evacuation challenges documented in earlier investigation phases.
This finding clarifies the initial trigger mechanism while investigators continue examining structural factors, including the partially closed glass door and acoustic foam sourcing irregularities previously identified during the inquiry.
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Foam material's combustibility proved critical to fire spread
Fire investigation specialists identified candle sparks as the initial ignition source, with the acoustic foam providing rapid fuel for flame propagation. Material analysis demonstrates the soundproofing foam's combustibility characteristics directly contributed to the fire's intensity and speed of spread throughout the enclosed bar space. This technical evidence establishes how the combination of ignition source and interior materials created conditions for mass casualties.
Preventable chain of failures led to catastrophic outcome
The fire originated from a common item—a candle—combined with flammable soundproofing foam, yet resulted in 41 deaths. Earlier investigation phases revealed structural impediments to evacuation, including a partially closed emergency door. The ignition source discovery underscores how multiple compounding factors—material selection, safety infrastructure, and fire management protocols—collectively created conditions for disaster.