IICRC WRT Cheat Sheet 2026

The 30 highest-yield IICRC WRT facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. When should restorative cleaning be performed during the water damage restoration process? → After the area is completely dried
2. Which piece of equipment is essential for detecting moisture behind walls and under floors? → Moisture meter
3. Protein fibres are dissolved in a 5.25% solution of? → Bleach
4. Which building assembly configuration poses the greatest risk for hidden moisture and potential microbial growth after a water intrusion? → Closed-cavity wall systems with fiberglass batt insulation
5. What is the purpose of using High-Efficiency Particulate Air (HEPA) vacuums in restorative cleaning? → To capture fine particles and contaminants
6. What are the three primary categories of water damage according to the IICRC S500 standard? → Clean, Grey, and Black Water
7. What is the purpose of creating a 'drying chamber' during structural drying? → To isolate the damaged area and concentrate drying equipment for maximum efficiency
8. What is the primary reason wet insulation must be removed before drying a wall cavity? → Wet insulation loses its R-value and blocks airflow needed for drying
9. According to the IICRC S500 standard, a water loss originating from a washing machine discharge line is best classified as which category of water? → Category 2
10. Fibres that are taken from animals or animal by-products are called? → Protein
11. Which of the following events would automatically be classified as a Category 3 water loss, regardless of the water's appearance? → A sewer backflow that originates from beyond the toilet trap.
12. Which factor most significantly affects the rate at which wood structural members dry? → Airflow velocity across the wood surface
13. When drying a building assembly that includes a vapor barrier, what is the most important consideration? → The vapor barrier may trap moisture and prevent drying, requiring perforation or removal
14. In a Category 3 water loss affecting structural cavities, what additional step is required before drying can begin? → Antimicrobial treatment and removal of contaminated porous materials
15. What does 'equilibrium moisture content' (EMC) mean in structural drying? → The moisture level at which a material neither gains nor loses moisture to its environment
16. Which class of water damage involves the least amount of water absorption and evaporation load? → Class 1
17. Why is it important to test cleaning agents on small areas before applying them widely in restorative cleaning? → Both B and C
18. What is the recommended action if mold is discovered during the water damage restoration process? → Assess the extent of mold growth and take appropriate remediation measures
19. Which personal protective equipment (PPE) is essential when handling contaminated water during the restoration process? → All of the above
20. What is the primary purpose of using air movers in water damage restoration? → To speed up the drying process
21. What is the primary concern when dealing with Category 3 water damage? → Health hazards
22. What is 'wicking' in the context of water damage restoration? → The movement of moisture through a porous material by capillary action
23. Natural fibres require longer drying times because they are? → Absorbent
24. What should be done to ensure electrical safety during water damage restoration? → All of the above
25. In a typical wood-framed wall assembly, what is the correct order of drying priority from fastest to slowest? → Drywall, insulation, wood framing, concrete foundation
26. When is it most appropriate for a restoration technician to use a thermal imaging camera during a moisture inspection? → To quickly identify potential moisture-laden areas by detecting temperature differences.
27. What is the recommended minimum airflow velocity at the surface of wet building materials for effective structural drying? → 200 feet per minute (FPM)
28. Why is it important to ensure proper ventilation during the water damage restoration process? → To prevent the buildup of harmful fumes and reduce indoor air pollution
29. When utilizing directed heat drying systems, what is the primary scientific principle being manipulated to accelerate evaporation? → Increasing the surface temperature of wet materials to raise their vapor pressure.
30. Fibres that come from plants are called? → Cellulosic