InterNACHI Interior Components and Finishes 2 — Questions and Answers
Question 1: A home inspector notices that a bathroom ceiling has peeling paint with brown staining. What is the most likely cause?
- Poor-quality paint was used
- Inadequate bathroom ventilation causing moisture buildup (Correct answer)
- The ceiling was painted over wallpaper
- Lead-based paint deterioration
Correct answer: Inadequate bathroom ventilation causing moisture buildup
Peeling paint with brown staining on a bathroom ceiling typically indicates moisture intrusion caused by inadequate ventilation, leading to condensation and mold.
Question 2: During an inspection, you find that interior door hinges are binding and the door drags on the floor along one side. What condition does this most likely indicate?
- Improper door installation
- Foundation settlement or structural movement (Correct answer)
- Seasonal wood expansion
- Worn hinge hardware
Correct answer: Foundation settlement or structural movement
Doors that bind or drag on one side often indicate foundation settlement or structural movement that has racked the door frame out of square.
Question 3: What is the minimum recommended R-value for attic insulation in most U.S. climate zones according to energy standards?
- R-19
- R-30
- R-38 (Correct answer)
- R-49
Correct answer: R-38
R-38 is commonly the minimum recommended R-value for attic insulation in most U.S. climate zones, though colder zones may require R-49 or higher.
Question 4: An inspector observes white, chalky deposits on the surface of a concrete basement floor. What is this condition called?
- Spalling
- Efflorescence (Correct answer)
- Carbonation
- Alkali-silica reaction
Correct answer: Efflorescence
Efflorescence is the white, chalky crystalline deposit left on concrete surfaces when water carrying dissolved salts migrates through and evaporates.
Question 5: Which type of flooring material is most susceptible to damage from water intrusion in a below-grade installation?
- Ceramic tile
- Solid hardwood (Correct answer)
- Vinyl luxury plank
- Epoxy coating
Correct answer: Solid hardwood
Solid hardwood flooring is highly susceptible to water damage below grade because wood swells, warps, and can develop mold when exposed to moisture.
Question 6: A home inspector finds a window that has a broken seal, evidenced by fogging between the panes. What component has failed?
- The window frame
- The insulated glass unit (IGU) (Correct answer)
- The window latch hardware
- The interior weatherstripping
Correct answer: The insulated glass unit (IGU)
Fogging between panes indicates seal failure of the insulated glass unit (IGU), which allows moist air to enter and condense between the glass layers.
Question 7: During an inspection, an interior wall shows a horizontal crack at mid-height running the full length. What does this pattern most commonly indicate in a masonry or brick veneer wall?
- Thermal expansion of the brick
- Lateral soil or hydrostatic pressure (Correct answer)
- Normal settling of the structure
- Improper mortar mix during construction
Correct answer: Lateral soil or hydrostatic pressure
A horizontal crack running the full length of a masonry wall at mid-height is a classic sign of lateral pressure from soil or water pushing inward on the wall.
InterNACHI Interior Components and Finishes 2
A home inspector notices that a bathroom ceiling has peeling paint with brown staining.
What is the most likely cause?