Wood, Brick, Rock and other surfaces that suffered smoke damage and light charring can be blasted clean without the messy residue associated with other cleaning methods.
Pressure washing with water can create its own problems: water in electrical components, saturated insulation and wood structures, corrosion of metal structures and components.
Sand blasting leaves behind abrasive grit particles that can damage electrical equipment and contaminates the area with silica dust.
The only cleanup after dry ice blasting is removing the charred materials and particulates.