Soot is the carbonaceous particulate produced by incomplete combustion. Particles are 0.1 to 4 microns, electrostatically charged, and deposit on cool surfaces far from the fire source. Soot can be cleaned from most non-porous and many porous materials; char cannot. Per IICRC S700 §10.
Category: Fire & SmokeReviewed: 2026-04-19Source: IICRC S700 §10
RP
Ryan PennyIICRC WRT/ASD/AMRT/FSRT/OCT · MI Builder License #2101187907 · Family-owned restoration in West Michigan since 1981.
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