How can you identify smoke damage migration to adjacent spaces?

How can you identify smoke damage migration to adjacent spaces?

• A. Check only the doorway threshold for heat.
• B. Assume no migration unless there is visible fire.
• C. Test water quality in neighboring rooms.
• D. Look for soot deposition on surfaces, HVAC intakes, and changes in air quality indicators in neighboring rooms.

Answer: (D)

Smoke moves with air and can spread beyond the fire area through cracks, doorways, and especially via the HVAC system, leaving tangible traces in spaces that weren’t directly involved in the fire. To identify migration, you’d look for soot deposits on surfaces in neighboring rooms—on walls, ceilings, and objects not in the fire zone—and for soot or smoke residue at HVAC intakes and in ducts. You’d also assess changes in air quality indicators in those spaces, such as unusual odors, hazy air, or increased particulates. This combination shows that smoke has traveled beyond the origin and is affecting adjacent areas.

The other ideas miss the mark because heat at a doorway isn’t a reliable signal of smoke spread, since migration can occur with little or no visible heat. Assuming no migration without visible fire ignores the way smoke travels through air currents and systems. Testing water quality in neighboring rooms doesn’t indicate smoke migration at all.