Class 1 through 4
The class of loss describes how much water the materials absorbed. It sets how many air movers and dehumidifiers a room needs and how long they run.
Estimate how long a water loss takes to dry. The window depends on the class of loss, the water source, the season and how soon drying started.
Pick your answers to see a typical drying window.
Estimate only. Equipment leaves on readings, not on a schedule: materials must reach 2 to 4 points of a dry reference.
Ask about the drying windowThe class of loss describes how much water the materials absorbed. It sets how many air movers and dehumidifiers a room needs and how long they run.
Late spring mornings stay damp under the marine layer, which slows evaporation. LGR dehumidifiers pull that moisture out so wet materials keep drying.
IICRC S500 is the industry drying standard. Wet materials are dried until they read within 2 to 4 points of a dry reference material in the same home.
More on equipment and readings on the structural drying page.
Framing, subfloor and drywall hold water after surfaces feel dry. Readings decide, so equipment stays until materials match the dry reference.
Yes. Damp air pulls less water out of wet materials. LGR dehumidifiers dry the air inside the containment so evaporation keeps going.
Dense materials release water slowly. Plaster walls and hardwood floors often need desiccant dehumidifiers, drying mats and more days than drywall or carpet.
Yes. Water that sits soaks deeper, and contaminated water adds removal and cleaning before drying even starts.
A contained Class 1 loss usually dries in three to five days when drying starts quickly. Bigger and denser losses take longer.
Drying time shrinks when extraction and equipment start early. The drying team sets up as soon as it is called.
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