noun
General Slang
rollover
· noun · firefighter
Flame rolling across the ceiling as unburnt fire gases ignite overhead.
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Definitions
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When the hot gas layer at ceiling level hits its ignition temperature and flames go rolling across the ceiling, ahead of the main fire. It's a warning sign — flashover is coming if you don't cool the gases now.
“Saw rollover above the doorway and hit the ceiling with a quick pencil of water before it tipped into flashover.”
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rollover In A Sentence
Saw rollover above the doorway and hit the ceiling with a quick pencil of water before it tipped into flashover.
Origin & Usage
Fire-service term distinguishing ceiling-level flame propagation from full compartment flashover.
People Also Ask
What does rollover mean in firefighting?
It refers to flame rolling across the ceiling as unburnt fire gases ignite overhead — a warning sign that conditions are heating toward flashover.
How do you use rollover in a sentence?
"We saw rollover across the ceiling and backed out before it flashed over."
Is a rollover the same as flashover?
No — rollover is the ignition of hot gases overhead and often precedes flashover, which is the sudden full ignition of everything in the room.
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