Don't forget to check the attic
An often-overlooked item in cleaning up after a home or business fire is checking the attic and the condition of the insulation. Heat rises and when things are heated, they can get pressurized. Even a small kitchen fire can produce temperatures of over 1,000 degrees. The heat and pressurization can carry soot particles into the attic and the insulation can get covered with a fine layer of soot. Because the soot may be consistently deposited throughout the attic, it might not stand out.
A quick check of the roof sheeting and joists with a dry clean sponge can show if soot is a problem in the attic space. If it is, insulation should be evaluated for removal and replacement. Once the insulation is removed, the attic space should be cleaned with dry clean sponges and consideration made to encapsulate all raw wood surfaces to lock in those particles, so they do not cause soot smells to be released in those hot summer months.