Skip to content
Fire and smoke line, 24/7(313) 391-5430Call

Plain English for restoration and claim jargon

Fire restoration glossary: terms you will hear

After a fire, contractors and adjusters use words most people have never needed before. This glossary explains the terms you are most likely to hear, grouped by where they come up: the damage itself, the cleanup, and the insurance claim.

By Evelyn Rowe, Fire and Smoke Guides Editor Updated September 2026

Quick answer

Key fire restoration terms include dry and wet soot (the two main residue types), protein residue from kitchen fires, ghosting (soot lines along framing), puff-back (soot blown from a misfiring furnace), pack-out (moving belongings out for cleaning), thermal fogging and ozone (odor treatments), and ACV versus RCV (depreciated versus full replacement value) on an insurance claim.

Damage terms

These describe what the fire and smoke left behind.

TermWhat it means
Dry sootPowdery residue from fast, hot fires burning wood and paper; easier to clean if not smeared.
Wet sootSticky, smeared residue from slow, smoldering fires and burning plastics; harder to clean.
Protein residueNearly invisible, strong-smelling film from burned food in kitchen fires.
GhostingDark lines on walls and ceilings where soot collected along framing or cold spots.
Puff-backSoot blown through a house when an oil or gas furnace misfires.
CharWood or material that burned; charred framing is usually cut out or sealed.
Smoke migrationSmoke traveling beyond the fire room through ducts, stairwells and wall cavities.

Cleanup terms

These describe the work you will see on a restoration job.

TermWhat it means
MitigationThe first steps that stop damage from getting worse: board-up, tarping, water removal.
Pack-outPacking and moving belongings off site to clean, store and inventory them.
HEPA air scrubberA machine that filters fine soot particles out of the air during cleanup.
Thermal foggingAn odor treatment that releases deodorizer as a fine fog into the same places smoke went.
Ozone treatmentAn odor treatment for unoccupied spaces that breaks down odor molecules.
Soda or dry ice blastingAbrasive cleaning that removes soot and char from framing and masonry.
SealingPriming smoke-stained surfaces with a stain- and odor-blocking primer before repainting.
Notebook and insurance papers on a table after a fire
Air scrubbers and odor treatments are standard steps in a smoke cleanup.

Hearing these terms on your own fire job? Call the line and we will walk you through them.

Call (313) 391-5430

Insurance terms

These come up when you talk to your insurer or adjuster.

TermWhat it means
AdjusterThe person who assesses the claim for the insurance company.
Proof of lossA formal statement of what you are claiming, often with a deadline.
ACVActual cash value: replacement cost minus depreciation.
RCVReplacement cost value: the cost to replace without deducting depreciation.
Recoverable depreciationThe amount withheld from an RCV policy until repairs or replacements are done.
ALEAdditional living expenses: temporary housing and extra costs while you cannot live at home.
Scope of lossThe line-by-line list of repairs and cleaning the claim covers.

Michigan-specific terms

Two Michigan terms are worth knowing. The Fire Insurance Withholding program lets participating cities hold back part of a large fire settlement until the property is repaired, secured or cleared. Michigan's claim-payment law also sets time limits for insurers to request proof of loss and to pay. Both are explained in our guide to filing a fire insurance claim in Michigan.

Glossary questions

Keep reading

Related guides

Soot-blackened cleaning sponge after one pass on a wall

Smoke Damage vs Soot Damage: What Each Needs

How smoke damage differs from soot damage, how to tell dry, oily and protein residue apart, and why it matters.

Read: smoke damage vs soot damage: what each needs
Soot-blackened cleaning sponge after one pass on a wall

Ozone vs Thermal Fogging vs Hydroxyl for Smoke Odor

How ozone, thermal fogging and hydroxyl work, how safe and fast each is, and which one fits your house.

Read: ozone vs thermal fogging vs hydroxyl for smoke odor
Homeowner and technician reviewing smoke damage photos

Filing a Fire Insurance Claim in Michigan

Opening the claim, proof of loss, Michigan's 60-day payment rule and the 25% fire withholding escrow, step by step.

Read: filing a fire insurance claim in michigan

Any hour, any day

Make sense of your fire job

Call the fire and smoke line. We explain the scope, the steps and the terms in plain English.

Call and find us

Call the fire and smoke line, or find the office

Hours
Answered 24 hours a day, 7 days a week
Service office
19003 Cliff St, Detroit, MI 48234
Head office
12458 Saginaw Road #7, Grand Blanc, MI 48439
Coverage
Detroit and Wayne County, north into Oakland and Macomb, west to Livingston and up to Genesee County around Grand Blanc and Flint. See the service region
Call the fire and smoke line(313) 391-5430