Class Types & How They Determine the Water Cleanup Process

Posted by Matt Buchanan

Speed is of the essence in every effort to clean up water damage.  The larger the area, the longer it takes to clean up water damage, and the more complex the necessary procedures.  If a drying project can’t be finished within 30 hours, property owners risk severe damage to their dry wall and support beams, as well as other types of structural damage.  Mold contamination is another serious risk.  Mold spores begin germinating on damp surfaces within 12 hours.

Experts use the following classification system to determine how quickly water damage cleanup should commence.

Class 1:  Slow Evaporation Rate

In this scenario, water spillage has only affected part of a room.  Affected materials aren’t particularly porous.  Objects like structural wood, particleboard and plywood won’t absorb large amounts of moisture.  Water damage cleanup is relatively fast.

Class 2:  Fast Evaporation Rate

These scenarios involve an entire room, or flood situations where water has reached a depth of two feet.  Moisture may be present even after structures appear to be dry.

Class 3:  Fastest Evaporation Rate

These scenarios involve flood situations where water has reached a depth of over two feet, has poured down from above, or through an open window during heavy rain.  These situations pose serious structural risks to property owners.

Class 4:  Specialty Drying Situations

These scenarios involve the saturation of highly porous materials, such as hardwoods, brick and concrete.  These situations require equipment designed to provide low humidity solutions to accelerate the drying process.


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About Matt Buchanan

I grew up in Irving, TX and left for Nashville, TN for college. After college I lived in Washington, DC and then in Cairo, Egypt. After coming back to the states, I spent a couple of years back in Dallas before moving with my wife to Denver!
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