A
Air mover. A powerful fan built for drying. It blows a fast sheet of air across wet floors and walls so water evaporates quickly. Pros place several of them in a set pattern — it is not the same as pointing a box fan at a puddle.
Antimicrobial treatment. A spray applied to surfaces after cleanup to kill bacteria and slow mold growth. It is a standard step after sewage backups and any job where water sat for a while.
B
Black water (Category 3 water). Water that is grossly contaminated — sewage, rising floodwater, or water that has sat long enough to grow dangerous bacteria. Anything porous that touched black water usually has to be thrown out. Never try to clean this yourself; see sewage backup cleanup.
C
Category 1 water (clean water). Water from a clean source — a burst supply pipe, a water heater leak, rainwater. It is not dangerous at first, but if it sits for a day or two it can turn into Category 2.
Category 2 water (gray water). Water with some contamination — washing machine overflow, dishwasher leaks, water from an aquarium. It can make you sick, so pros wear protective gear for it.
Category 3 water. See black water above.
Clean water. See Category 1 water above.
D
Dehumidification. Pulling moisture out of the air with a dehumidifier so wet materials dry faster and mold cannot get started. Air movers push water into the air; dehumidifiers pull it back out. Drying needs both.
Demolition (selective). Removing only the building materials that cannot be saved — wet drywall, soaked insulation, ruined carpet pad — so the structure underneath can dry. Good crews remove as little as possible.
E
Extraction. See water extraction below.
F
Flood cut. Cutting out the bottom 1–2 feet of wet drywall so the wall cavity can dry. Drywall wicks water upward past the visible waterline, so the cut goes at least a foot above the highest wet mark. Wet insulation behind it comes out too.
G
Gray water. See Category 2 water above.
M
Moisture meter. A handheld tool that reads how wet wood, drywall, and concrete actually are — deeper than the surface. Pros do not stop drying until the meter reads dry, because "dry to the touch" can hide trapped moisture. See moisture inspection.
Mold prevention. Steps taken during and after drying to keep mold from starting: fast extraction, thorough drying, antimicrobial treatment, and airflow. Prevention is part of every proper water job — see mold prevention after water damage.
Mold remediation. The separate, specialized job of removing an established mold colony — containment, HEPA filtration, removal of affected materials. Different from prevention: prevention stops mold before it starts, remediation removes it after it has grown.
P
Pack-out. Carefully moving your belongings out of the damaged area — to a dry room or off-site — so the structure can be dried and your things can be cleaned and dried separately. Common after large losses.
R
Relative humidity. How much moisture the air is holding, as a percentage. Indoor air above 60% relative humidity invites mold. During drying, pros watch this number to know the dehumidifiers are winning.
S
Sewage backup. Wastewater flowing backward into your home through drains or toilets — always treated as black water (Category 3). Do not touch it and do not try to save soaked porous items. See sewage backup cleanup.
Structural drying. Drying the building itself — framing, subfloor, wall cavities — not just the surfaces you can see. This is the part that takes days and the part most DIY jobs skip. See structural drying.
Sump pump. A pump in a pit under your basement floor that pushes groundwater out before it can flood in. If yours runs during storms, test it before storm season — a failed sump pump is one of the most common causes of flooded basements.
V
Vapor barrier. A plastic sheet laid over crawl space soil (or behind walls) that blocks ground moisture from rising into the structure. Often added or replaced during crawl space drying.
W
Water extraction. The first step of every job: physically removing standing water with pumps and truck-mounted or portable extractors. The more water pulled now, the less drying later. See water extraction.
Heard a term we missed? Call (301) 679-9193 and ask — we will explain it straight.