Water damage is classified by both category and class. The category refers primarily to the level of contamination in the water, while the class relates to the extent of the damage and how much water has been absorbed into affected materials.

If you know the source of the water damage, be sure to let the restoration team know. Identifying the source can help determine the appropriate category and allow restoration professionals to follow the proper procedures for cleanup, drying, and restoration.

Category 1 water damage originates from a sanitary water source. Examples may include broken water supply lines, overflowing toilet tanks containing clean water, leaking faucets, or failed water heaters.

Although Category 1 water is considered the cleanest type of water damage, the situation can become more serious if it is left untreated for an extended period of time or comes into contact with contaminants.

Prompt water extraction and drying can help prevent additional damage and reduce the risk of contamination.

Category 2 water damage involves water that contains contaminants and may cause discomfort or illness if a person comes into contact with or ingests it.

Common examples may include washing machine overflows, dishwasher overflows, or toilet overflows containing urine but no fecal matter.

This water may contain microorganisms or other contaminants that can create an environment where additional microbial growth can occur. If the situation is not addressed promptly and properly, the level of contamination may increase.

Category 3 is the most highly contaminated classification of water damage. This type of water may contain harmful bacteria, viruses, sewage, chemicals, or other potentially dangerous contaminants.

Possible sources may include:

• Sewer backups
• Floodwater from rivers or streams
• Contaminated water from beyond the toilet trap
• Certain forms of storm or groundwater intrusion
• Water that has become heavily contaminated over time

Because Category 3 water can present serious health risks, it should be handled by trained restoration professionals using appropriate safety and remediation procedures.

Water damage may also be classified according to the amount of water present, the materials affected, and the rate at which moisture has been absorbed.

Understanding the class of water damage helps restoration professionals determine the equipment, drying methods, and amount of time that may be necessary to properly dry the affected property.

Class 1 generally involves the least amount of water and a relatively low level of absorption.

Only a portion of a room or area may be affected, and there may be little or no wet carpeting or other highly absorbent materials. Moisture may primarily affect materials with lower absorption rates, such as concrete or certain types of wood.

Because the affected area is limited, drying and restoration may be less extensive than with higher classifications.

Class 2 water damage involves a greater amount of water and a larger affected area.

Moisture may affect carpeting, padding, walls, and structural materials. Water may also wick upward into walls and other porous materials.

Professional drying equipment may be necessary to remove moisture and help prevent long-term damage to the structure.

Class 3 water damage generally involves a significant amount of water with a high rate of absorption.

Walls, ceilings, insulation, carpeting, sub-flooring, and other materials may become heavily saturated. In some situations, the water may have originated from overhead or spread throughout a substantial portion of the property.

Class 3 water damage typically requires extensive water extraction, drying, dehumidification, and moisture monitoring.

Class 4 water damage involves water that has deeply penetrated materials that are more difficult to dry, such as hardwood, plaster, concrete, masonry, and other dense building materials.

These materials may retain moisture deep below the surface and often require specialized drying techniques, controlled humidity levels, and longer drying periods.

Every water damage situation is different. The source of the water, level of contamination, materials affected, and amount of moisture present all help determine the proper restoration process.

At Restoration Master LLC, we assess the affected areas, identify moisture throughout the property, and develop an appropriate plan for water extraction, drying, cleanup, and restoration.

The sooner water damage is addressed, the better the opportunity to limit additional damage and begin restoring your property.