The Classes of Water Damage
The Classes of Water Damage Losses are determined by the rate of evaporation based on the type of materials affected by water damage to your property. Determining the Class of Water is an important first step and will determine the amount and type of equipment utilized to restore your business. Here are four IICRC water damage classifications:
Class 1 - Slow Evaporation Rate
Water losses that affect only part of a room or area, or losses with lower permeance/porosity materials (e.g., plywood, particle board, structural wood, vinyl composition tile or VCT, concrete). Little or no wet carpet or cushion is present. Minimum moisture is absorbed by materials, releasing moisture slowly.
Class 2 - Fast Evaporation Rate
Water losses that affect an entire room or carpet and cushion. Water has wicked up walls 12" - 24". There is moisture remaining in structural materials (e.g., plywood, particle board, structural wood, concrete).
Class 3 - Fastest Evaporation Rate
Water may have come from overhead. Ceilings, walls, insulation, carpet, cushion and sub-floor in the entire area are saturated.
Class 4 - Specialty Drying Situations
These consist of wet materials with very low permeance/porosity (hardwood, plaster, brick, concrete, stone, and crawlspace). Typically, there are deep pockets of saturation, which requires very low specific humidity.