Restoration terms, decoded.
48 terms you'll hear from a restoration crew or an insurance adjuster — in plain English.
General
Mitigation
Mitigation is the immediate emergency work that stops a loss from worsening and prevents secondary damage, distinct from the later restoration work that returns a property to its pre-loss condition.
Remediation
Remediation is the process of correcting or removing a contaminant or hazard, such as mold or sewage, so that a space is returned to a safe, normal condition rather than simply dried or repaired.
Containment
Containment is the practice of isolating a work area with physical barriers and controlled airflow so that contaminants such as mold spores, soot, or sewage-related particles do not spread to clean parts of a building.
IICRC
The IICRC is the Institute of Inspection, Cleaning and Restoration Certification, a nonprofit body that develops the consensus standards and certifies the technicians who perform professional cleaning and restoration work.
IICRC S500
IICRC S500 is the consensus-based standard for professional water damage restoration, defining principles and procedures for categorizing water losses, drying structures, and documenting the work.
IICRC S520
IICRC S520 is the consensus-based standard for professional mold remediation, defining how to assess mold contamination, establish containment, remove growth safely, and verify that an area has returned to normal conditions.
Contents Restoration
Contents restoration is the cleaning, deodorizing, and repair of a property’s personal belongings and furnishings after a loss, guided by a "restore rather than replace" philosophy that saves salvageable items.
Antimicrobial
An antimicrobial is a product applied during restoration to inhibit or kill microorganisms such as bacteria and mold on surfaces, used as one part of a cleaning process rather than as a substitute for physical removal.
Personal Protective Equipment (PPE)
Personal protective equipment, or PPE, is the gear worn by restoration technicians such as respirators, gloves, suits, and eye protection, selected according to the hazards of a specific loss to keep workers safe.
Water
Water Damage Restoration
Water damage restoration is the full process of removing standing water, drying affected building materials, and repairing or replacing what cannot be saved so a structure returns to its pre-loss condition.
Structural Drying
Structural drying is the science-driven process of removing residual moisture from building materials like framing, subfloor, and drywall using controlled airflow, dehumidification, and temperature until they reach a documented dry standard.
Water Extraction
Water extraction is the physical removal of standing and absorbed water from a property using pumps and extraction equipment, the critical first step that removes the vast majority of moisture before drying begins.
Dehumidification
Dehumidification is the mechanical removal of water vapor from the air inside a drying environment, capturing the moisture that evaporates from wet materials so it cannot redeposit elsewhere in the structure.
Air Mover
An air mover is a high-velocity fan used in structural drying to sweep the saturated boundary layer of air off wet surfaces, accelerating evaporation so dehumidifiers can capture the released moisture.
Psychrometry
Psychrometry is the study of the physical properties of air and water vapor mixtures, and in restoration it is the science used to measure, predict, and control the drying of a structure.
Moisture Meter
A moisture meter is a handheld instrument that measures the moisture content of building materials, used to map the extent of a water loss and to verify when materials have reached the documented dry standard.
Category 1/2/3 Water
Water categories classify the level of contamination in a water loss on a scale from Category 1 (clean) to Category 3 (grossly contaminated), determining how materials must be handled, cleaned, or discarded.
Class of Water Loss
The class of a water loss describes how much water is present and how much of the affected materials are wet, on a scale from Class 1 (least) to Class 4 (specialty drying), which determines the drying difficulty and equipment needed.
Black Water
Black water is Category 3 water that is grossly contaminated and may contain harmful pathogens, chemicals, or sewage, requiring the most protective handling and the disposal of most porous materials it contacts.
Gray Water
Gray water is Category 2 water that carries significant contamination and could cause illness if contacted or ingested, requiring removal of heavily affected porous materials and antimicrobial treatment.
Efflorescence
Efflorescence is the white, crystalline salt deposit that appears on masonry, concrete, and brick when water carries dissolved minerals to the surface and evaporates, leaving the salts behind as a sign of moisture movement.
Wicking
Wicking is the capillary movement of water through porous building materials, drawing moisture upward and outward from a wet area into adjacent dry materials such as up a wall or across a subfloor.
Grain Depression
Grain depression is the difference in absolute humidity, measured in grains per pound, between the air entering a dehumidifier and the air leaving it, used to verify that the machine is actively removing moisture.
Sewage Cleanup
Sewage cleanup is the specialized removal and decontamination of areas affected by a sewage backup or overflow, treated as a Category 3 black water biohazard requiring protective equipment, containment, and disposal of contaminated porous materials.
Desiccant Dehumidifier
A desiccant dehumidifier removes moisture from the air by passing it over a moisture-absorbing material rather than a cold coil, making it effective in low temperatures and very low humidity where refrigerant units struggle.
Moisture Mapping
Moisture mapping is the process of surveying a water-damaged property with meters and thermal imaging to chart exactly where moisture has traveled, creating a documented picture of the loss that guides drying.
Secondary Damage
Secondary damage is the harm that develops after the initial water event, such as swelling, warping, corrosion, and mold, caused by moisture that lingers in materials and the surrounding air rather than by the original intrusion.
Flood Cut
A flood cut is the removal of a horizontal strip of drywall, typically 12 to 24 inches above the visible water line, made to inspect and dry the wall cavity and to remove materials that wicked up contaminated water.
Fire & Smoke
Thermal Fogging
Thermal fogging is a deodorization technique that heats a specialized deodorizer into a dense fog of tiny particles that penetrate the same porous surfaces and cavities that smoke odor reached, neutralizing trapped odors.
Soot
Soot is the fine black or brown carbon residue produced by incomplete combustion during a fire, which settles on surfaces, is acidic and corrosive, and must be removed carefully to prevent permanent staining and etching.
Smoke Damage
Smoke damage is the harm caused by smoke residue, soot, and odor spreading through a structure during a fire, often affecting areas far from the flames and requiring specialized cleaning and deodorization.
Board-Up
Board-up is the emergency securing of a damaged property by covering broken windows, doors, and openings and tarping compromised roofs to protect against weather, intrusion, and further loss.
Puffback
A puffback is a sudden misfire in an oil-fired furnace or boiler that blows soot, oily smoke, and combustion debris back into the living space, coating surfaces with a greasy black residue.
Hydroxyl Generator
A hydroxyl generator is a deodorization device that uses ultraviolet light to produce hydroxyl radicals, which break down odor-causing molecules in the air and is safe enough to run in occupied spaces.
Ozone Treatment
Ozone treatment is a deodorization method in which a generator produces ozone gas that oxidizes and neutralizes odor molecules, performed only in unoccupied spaces because ozone is unsafe to breathe.
Smoke Webs (Soot Tags)
Smoke webs, also called soot tags, are spiderweb-like chains of soot that form in corners and on ceilings during a fire, produced when smoke particles cling together in cooler, less-ventilated areas.
Gross vs. Detailed Cleaning
Gross cleaning and detailed cleaning are the two stages of fire-residue removal, where gross cleaning strips away heavy bulk soiling first and detailed cleaning then addresses fine residue on remaining surfaces.
Mold
Negative Air / HEPA
Negative air is a pressure differential that pulls air into a contained work area so contaminants cannot escape, while HEPA filtration captures at least 99.97 percent of airborne particles down to 0.3 microns, together scrubbing and controlling the air during remediation.
Mold Remediation
Mold remediation is the professional process of safely removing mold growth, cleaning affected surfaces, and correcting the underlying moisture problem so that mold does not return, performed under containment to prevent spore spread.
Black Mold (Stachybotrys)
Black mold usually refers to Stachybotrys chartarum, a dark greenish-black mold that grows on chronically wet, cellulose-rich materials, though many molds appear black and identification requires more than color.
Mold Inspection
A mold inspection is a systematic assessment of a property to locate mold growth, identify the moisture source feeding it, and determine the extent of contamination so an effective remediation plan can be developed.
Mold Spores
Mold spores are the microscopic reproductive cells that molds release into the air; they are naturally present everywhere indoors and out, and they germinate into new growth wherever they land on a moist surface.
Mildew
Mildew is a common term for surface-growing mold, typically appearing as a flat, powdery gray or white patch on damp surfaces, which is generally easier to clean than the deeper growth associated with structural mold problems.
Negative Air Pressure
Negative air pressure is the practice of keeping a contained work area at lower pressure than the surrounding space so that air flows inward through any gaps, preventing contaminants from escaping into clean areas.
HEPA Filtration
HEPA filtration uses a High-Efficiency Particulate Air filter that captures at least 99.97 percent of airborne particles at 0.3 microns, the size range that includes mold spores and fine soot, to clean the air during restoration.
Encapsulation
Encapsulation is the application of a specialized coating over a surface after remediation to seal it, used to lock down any residual staining or spores on materials that were cleaned but could not be removed.
Post-Remediation Verification
Post-remediation verification is the assessment performed after mold remediation to confirm the area is visibly clean, dry, and returned to normal conditions, ideally by an independent party separate from the company that did the work.
Conducive Conditions
Conducive conditions are the environmental factors that allow mold to grow, primarily moisture combined with a food source and suitable temperature, which must be corrected for remediation to last.