The homeowner
is responsible to take the necessary steps to preserve and protect their property from further damage
Four principles of water
... [Show More] damage restoration:
Provide for health and safety of workers and occupants; Document everything; Mitigate, and Dry
Four principles of drying
Extract, Evaporate, dehumidify, control temp
Extraction
is removing excess water and is the first step in mitigation
Evaporation
is achieved by using energy (heat) to transform water trapped in porous materials into a vapor, thereby releasing the moisture from the materials.
Dehumidification
the process of removing water vapor from the air.
Rate of Dehumidification
must be at least equal to the rate of evaporation.
True or False
Elevated vapor pressure in a room Can cause secondary damage to hygroscopic materials
True or False
The control of temperature is important to enhance both evaporation and dehumidification for effective drying
True or False
When temperature increases evaporation of absorbed water increases and water vapor suspended in air also increases.
Classification of Water Intrusion
described as Class 1, 2, 3, or 4. Must be determined to calculate the amount of dehumidification required in drying process, based on the amount of wet surface area, permeance/porosity of materials in drying area.
Class 1
is the least amount of water absorption and evaporation load, affecting less 5% of porous materials with minimal absorption into low evaporation materials.
Class 2
has a significant amount of water absorption and evaporation load, affection 5-40% porous materials, with minimal absorption into low evaporated materials
Class 3
has the greatest amount of water absorption and evaporation load, affecting more than 40% porous materials and minimal absorption into low evaporated materials
Class 4
has deeply held or bound water, and significant absorption into low evaporation materials.
Determine the Class of water for a 20' x 20' x 8 ' room, with an entirely wet floor..
Affected area/Total SF = % affected
400/1440 = .27777 x 100 = 28%
28% = Class 2
Determine the Class of Water for a 20' x 20' x 8' room, with only half the floor affected and arriving within 24 hours of loss.
Affected area/total sf = % affected
200/1440 = .13888 x 100 = 14%
14% = Class 2
Determine Class of water for a 20' x 20' x 8' room, with entirely wet plywood subfloor arriving 48 hours after loss
affected area/total sf = % affected
Class 4 due to deeply bound water sitting for long time
Categories of Water
there are four categories - determined by range of contamination of the source and quality of water
Category 1 water
Water originating from sanitary water source, with no deterioration, does not pose risk to skin or if ingested
Category 2 Water
Water containing significant contamination from materials, unsafe levels of microorganisms, causes discomfort or sickness.
Category 3 Water
Water grossly contaminated with pathogens, toxins, bacteria, causes sickness
Regulated or Hazardous Material and Mold
the last category of water, without number designation, requiring a specialized environmental expert (EIP) to assist where government regulations apply.
The ANSI/IICRC S500
Is the standard of care for the water damage restoration industry, providing foundation for basic principles of proper restoration practices.
When the ANSI/IICRC S500 uses the word "Shall" it means
it is something mandatory due to laws/regulations
When the ANSI/IICRC S500 uses the word "Should" it means
it is something that is mandatory but not due to laws
When the ANSI/IICRC S500 uses the word "Recommended" it means
it is something that is advised or suggested to do
Psychrometry
the study of the relationship between air [Show Less]