Classes of water intrusion

Classes of water intrusion

Classes of water intrusion

The best professionals manipulate and control as many factors as possible in their drying system to finish each job as soon as practical, including:

- Extracting as much water as possible

- Lowering humidity in the affected air

- Increasing airflow across wet surfaces

- Controlling temperature of air and surfaces

- Using outside air when possible

- Creating a drying chamber

- Adjusting or removing equipment when necessary

- Removing items that should not be dried

- Saving items that can be dried in place

- Using specialized tools to dry difficult areas

A tool used to determine equipment needs is water classification. Classes of water describe the potential rate of evaporation based upon the amount of water present and the type of material affected. There are four classes of water loss.

Class 1

With a class 1 water intrusion, evaporation will progress at a slow rate because there is minimal water present in the structure. Class 1 intrusions involve only a part of an area, or involve a larger area that has only been lightly affected. in a Class 1 loss, there is little or no wet carpet or cushion; typically, only low porosity materials (such as plywood, concrete and structural lumber) are affected. some examples of common Class 1 water intrusions are:

- A concrete basement floor that only absorbed a small amount of water

- A structure that was recently affected by sewage and all wet porous materials were removed.

- Losses where carpet and pad have been removed and there is no wet gypsum.

In a Class 1 intrusion, the moisture laden boundary layer will be minimal because there is a slow rate of evaporation. Therefore, Class 1 intrusions require the least amount of equipment. Since evaporation is slow, less dehumidification is needed to keep a balanced drying system.

Source of article: "New Guide to Restorative Drying" DriEaz Education

ISBN-13: 978-0-9776701-1-6

http://www.drieaz.com/_DEC/DEC_Product_Base.aspx?decID=1082&AspxAutoDetectCookieSupport=1

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