Recent Water Damage Posts

Category of Water

3/9/2017 (Permalink)

Water Damage Category of Water Black water/ Category 3

               


When your home or business suffers from a storm, it’s critical to know the difference between different levels of contaminated water. There are 3 category of water, Clean (Cat 1), Gray(Cat 2) and Black (Cat 3).


Category of Water


The Categories of water as defined by this document, refer to the range of contamination in the water, considering both its originating source and its quality after it contacts material present on the job site. The time and temperature can affect or retard amplification of contaminants, thereby affecting its category. Restorers should consider potential contamination, defined as presence of undesired substances; the identity location, and quantity of which are not reflective of normal indoor environment; and can produce adverse health effects, caused damage to structure and contents, or adversely affect the operation or function of a building.


 


Category 1: Category 1 water originates from a sanitary water source and does not pose substantial risk from dermal, ingestion or inhalations exposure. Examples of Category 1 water source can include but are not limited to: broken water supply lines; tub or sink overflows with no contaminants; appliances malfunctions involving water-supply lines; melting ice or snow; falling rain water; broken toilet tanks; toilet bowls that do not contain contaminants or additives.


Category 1 water can deteriorate to a Category 2 or 3. Category 1 water that flows into an uncontaminated building does not constitute an immediate change in the category. However, Category 1 water that flows into a contaminated building can constitute an immediate change in the category. Once microorganisms become wet from the water intrusion, depending on the length of time that they remain wet and the temperature, they can begin to grow in numbers and can change the category of the water. Odors can indicate that Category 1 has deteriorated.


 


Category 2: Category 2 water contains significant contamination and has the potential to cause discomfort or sickness if contacted or consumed by humans. Category 2 water can contain potentially unsafe levels of microorganisms or nutrients for microorganisms, as well as other organic or inorganic matter (chemical or biological). Examples of Category 2 water can include, but are not limited to: discharge from dishwashers or washing machines; overflows from washing machines; overflows from toilet bowels on the room side of the trap with some urine but no feces; seepage due to hydro-static pressure; broken aquariums; and punctured water beds.


Category 2 water can deteriorate to Category 3. Once the microorganisms become wet from the water intrusion, depending upon the length of time that they remain wet and the temperature, they can begin to grow in numbers and can change the category of the water.


 


Category 3: Category 3 water is grossly contaminated and can contain pathogenic, toxigenic or the other harmful agents and can cause the significant adverse reactions to humans if contacted or consumed. Examples of Category 3 water can include, but not limited to: sewage; wasteline back flows that originated from beyond the trap regardless of visible content or color; all other forms of contaminated water resulting from seawater; rising waters from rivers or streams; and other contaminated water entering or affecting the indoor environment, such as wind-driven rain from hurricanes, tropical storms or other weather-related events if the carry trace levels of contaminates (e.g. pesticides or toxic organic substances).

Class of Water Intrusion

3/9/2017 (Permalink)

Water Damage Class of Water Intrusion Class 3 Water Damage

Class of Water intrusion

Restorers should estimate the amount of humidity control needed to begin the drying process. A component of the humidity control requirement is the Class of water.

The term “Class of water intrusion is a classification of the estimated evaporation load and is used when calculating the initial humidity control (e.g. dehumidification, ventilation). The classification is based on the approximate amount of wet surface area, and the permeance and porosity of the affected materials remaining within the drying environment at the time drying is initiated. Information needed to determine Class should be gathered during the inspection process. The Classes are divided into four separate descriptions, Class 1,2,3 and 4.

 

Class 1- (least amount of water absorption and evaporation load); Water intrusion where wet, porous materials (e.g., carpet gypsum board, fiber-filled insulation, concrete masonry unit (CMU), textiles) represent less than ­~5% of the combined floor, wall and ceiling surface area in the space; and where materials described as low evaporation materials (e.g., plaster wood, concrete, masonry) or low evaporation assemblies (e.g., multilayer wallboards, multilayer subfloors, gym floors or other complex built-up assemblies) have absorbed minimal moisture.

 

Class 2- (significant amount of water absorption and evaporation load): Water intrusion where wet porous materials (e.g., carpet gypsum board, fiber-fill insulation concrete masonry unit (CMU, textiles represent ~5% to ~40% of the combined floor, wall and ceiling surface area in the space; and where materials described as low evaporation materials (e.g., plaster wood, concrete, masonry) or low evaporation assemblies (e.g., multilayer wallboards, multilayer subfloors, gym floors or other complex built-up assemblies) have absorbed minimal moisture.

 

Class 3- (greatest amount of water absorption and evaporation load): Water intrusion where wet porous materials (e.g., carpet gypsum board, fiber-fill insulation concrete masonry unit (CMU, textiles represent more than ~40% of the combined floor, wall and ceiling surface area in the space; and where materials described as low evaporation materials (e.g., plaster wood, concrete, masonry) or low evaporation assemblies (e.g., multilayer wallboards, multilayer subfloors, gym floors or other complex built-up assemblies) have absorbed minimal moisture.

 

Class 4- (deeply held or bound water): Water intrusion that involves a significant amount of water absorption into low evaporation materials (e.g., plaster, wood, concrete, masonry) or low evaporation assemblies (e.g., multilayer wallboards, multilayer subfloors, gym floors or other complex built-up assemblies). Drying may require special methods, longer drying times or substantial water vapor pressure differentials.

 

Other Factors Necessary to Estimate Drying Capacity

Other factors can impact the drying environment. Restorers should understand and consider there factors when estimating the drying capacity needed to prevent additional damages and being the drying process.

These factors include:

  • Influence of heating, ventilation and air conditioning (HVAC) systems;
  • Build out density of the affected area;
  • Building construction complexity; and
  • Influence of outdoor weather.

Do Fall Outside Home Maintenace

10/8/2013 (Permalink)

Now, during these balmy fall days, is the time to do outside inspections of your gutters, downspouts, and your house's foundations.  Take a little extra time, to clean out gutters, or install gutter helmuts, check for obstructions to your downspouts and make sure they drain away from your foundation and to check for cracks around your home's foundation and to caulk and/or repair them before the winter arrives.