Water damage work comes with its own vocabulary, and the same word can mean different things depending on who's saying it. A restoration company, an adjuster and a repair contractor may all use "restoration" for slightly different scopes. This guide puts the common terms side by side so a scope of work or an invoice reads clearly.
The Big Three
| Term | What it usually means | When it happens |
|---|---|---|
| Water mitigation | Stopping the damage from growing: extraction, removing ruined materials, drying | First, in the days right after the water |
| Water damage restoration | The whole process, from mitigation through to a finished, rebuilt room; some companies use it for drying only | Start to finish |
| Water damage repair | Putting the house back: drywall, insulation, floors, cabinets, paint, trim | After the structure reads dry |
The distinction that matters most is mitigation versus repair. Insurers often look at them separately. Some companies do both, and others do mitigation and hand off the repair. When you get a scope of work, check which parts it includes.
Terms You'll See in the Mitigation Phase
Water extraction / water removal. Pulling standing water out with pumps and extractors. Usually priced by area. "Emergency water removal" just means the water is still standing.
Water damage remediation. Often used interchangeably with mitigation, meaning the phase that addresses the water and its immediate effects. On this site, water damage remediation refers only to water work.
Moisture mapping. Finding the edges of the wet area with meters and thermal imaging, and recording the readings on a sketch.
Structural drying. Drying the building itself (framing, subfloor, drywall, concrete) with air movers and dehumidifiers, guided by readings. It's different from just drying the air in a room.
Dry standard. The moisture reading of an unaffected area of the same house. Drying is done when the wet areas match it.
Flood cut. Cutting drywall a set height above the floor, often 1, 2 or 4 feet, to remove wet or contaminated material and let the wall cavity dry.
Containment. Plastic sheeting that seals off the drying zone so the equipment works on a smaller space.
Antimicrobial application. A treatment applied to cleaned surfaces after contaminated water, before drying.
Categories and Classes
These two words describe different things, and both show up on scopes.
Category is about how clean the water is:
| Category | Meaning | Typical source |
|---|---|---|
| 1 | Clean | Supply line, water heater |
| 2 | Gray, some contamination | Washer or dishwasher discharge |
| 3 | Grossly contaminated | River flooding, surface runoff, sewage |
Class is about how much evaporation is needed, which depends on how much got wet and with what:
| Class | Meaning |
|---|---|
| 1 | Small area, little absorbed |
| 2 | A whole room, carpet and wall bottoms wet |
| 3 | Water from above; ceilings, walls and floors saturated |
| 4 | Dense materials wet: hardwood, plaster, concrete; needs specialty drying |
A higher category means more removal and cleaning. A higher class means more equipment and more days.
Terms in the Repair Phase
Scope of work. The written list of what will be done, room by room, with quantities.
Like kind and quality. Insurance language for replacing damaged material with something equivalent, not necessarily identical, unless matching is required to make the repair reasonable.
Supplement. An addition to an approved scope when hidden damage turns up during the work.
Rebuild / reconstruction. Another name for the repair phase.
Terms About Contents and Living Arrangements
Contents manipulation. Moving furniture and belongings out of the way so the crew can work, and back again afterward.
Pack-out. Boxing up belongings and moving them off site for cleaning or storage, usually after larger losses.
Additional living expense (ALE) / loss of use. Insurance coverage, where a policy includes it, for extra costs like a hotel when the home can't be lived in during the work.
Certificate of completion. A form the company may ask you to sign when the work is done. Read it, and sign only when you agree the work is finished.
Questions
Is "remediation" the same as "restoration"?
Not quite. Remediation usually refers to the early phase that deals with the water itself. Restoration usually means the whole job, or at least the drying. Ask the company to describe its scope in plain terms.
Why are there two invoices?
Mitigation and repair are often billed separately, sometimes by two companies, and insurers often handle them separately. That's normal.
Where This Shows Up
The restoration process start to finish: restoration & repair. The drying phase in detail: mitigation & drying. These terms apply the same way in Cascade, Burien and Mercer Island as anywhere else.
What a Water Damage Cleanup Bill Is Made Of
The line items, and what makes each one bigger or smaller.
How to Check a Washington Restoration Contractor
Registration, insurance, a written scope and the red flags.