IICRC WATER RESTORATION
COMPREHENSIVE EXAMINATION TEST
2026 FULL QUESTIONS AND CORRECT
ANSWERS
◉What are the four classes of water loss?. Answer: 1.) Class 1: least
2.) Class 2: significant
3.) Class 3: greatest
4.) Class 4: deeply held or bound water
◉How is Class 1 of water loss defined?. Answer: Water losses that
affect less than 5% of the combined floor, wall, and ceiling surfaces
in a space. Minimal absorption in low evaporation materials.
◉How is Class 2 of water loss defined?. Answer: Water losses that
affect between 5% to 40% of the combined floor, wall, and ceiling
surfaces in a space.
Minimal absorption in low evaporation materials
◉How is Class 3 of Water Loss Defined?. Answer: Water losses that
affect and represent more than 40% of the combined floor, wall, and
ceiling services in a space
, Minimal absorption in low evaporation materials
◉How is Class 4 of water loss defined?. Answer: Deeply held or
bound water.
Water intrusion that involves a significant amount of water
absorption into low evaporation materials.
◉What kind of materials would be found in a class four water loss?.
Answer: Wet materials with extremely low permeance
◉What is permeance?. Answer: The ability of vapor or water to pass
through a material
◉When would you recommend the services of a third party
evaluator? Who would this be?. Answer: When high risk individuals
are working or living in a water damage environment. Public Health
Issues. Microbial Contamination
An IEP
◉What does IEP stand for?. Answer: Indoor Environmental
Professional
COMPREHENSIVE EXAMINATION TEST
2026 FULL QUESTIONS AND CORRECT
ANSWERS
◉What are the four classes of water loss?. Answer: 1.) Class 1: least
2.) Class 2: significant
3.) Class 3: greatest
4.) Class 4: deeply held or bound water
◉How is Class 1 of water loss defined?. Answer: Water losses that
affect less than 5% of the combined floor, wall, and ceiling surfaces
in a space. Minimal absorption in low evaporation materials.
◉How is Class 2 of water loss defined?. Answer: Water losses that
affect between 5% to 40% of the combined floor, wall, and ceiling
surfaces in a space.
Minimal absorption in low evaporation materials
◉How is Class 3 of Water Loss Defined?. Answer: Water losses that
affect and represent more than 40% of the combined floor, wall, and
ceiling services in a space
, Minimal absorption in low evaporation materials
◉How is Class 4 of water loss defined?. Answer: Deeply held or
bound water.
Water intrusion that involves a significant amount of water
absorption into low evaporation materials.
◉What kind of materials would be found in a class four water loss?.
Answer: Wet materials with extremely low permeance
◉What is permeance?. Answer: The ability of vapor or water to pass
through a material
◉When would you recommend the services of a third party
evaluator? Who would this be?. Answer: When high risk individuals
are working or living in a water damage environment. Public Health
Issues. Microbial Contamination
An IEP
◉What does IEP stand for?. Answer: Indoor Environmental
Professional
