Home Inspector Test Home Inspector Foundation and Basement Inspection 1 — Questions and Answers
Question 1: Which type of foundation crack is generally considered most serious in a poured concrete foundation?
- Hairline shrinkage cracks
- Horizontal cracks in the middle of the wall (Correct answer)
- Diagonal cracks at corners of window openings
- Vertical cracks near the center of the wall
Correct answer: Horizontal cracks in the middle of the wall
Horizontal cracks in foundation walls indicate lateral soil or hydrostatic pressure bowing the wall inward, which is a serious structural deficiency requiring professional evaluation.
Question 2: What is 'efflorescence' and what does it indicate to a home inspector?
- A type of foundation repair epoxy
- White mineral deposits on masonry surfaces indicating water migration through the wall (Correct answer)
- Black mold on basement walls
- Spalling caused by freeze-thaw cycles
Correct answer: White mineral deposits on masonry surfaces indicating water migration through the wall
Efflorescence is the white crystalline residue left when water carries dissolved salts through masonry and evaporates, indicating past or ongoing moisture intrusion.
Question 3: A home inspector finds that the grade around the foundation slopes toward the house. What is the recommended minimum slope away from the foundation?
- 1 inch per 10 feet
- 6 inches in the first 10 feet (Correct answer)
- 12 inches in the first 5 feet
- 3 inches in the first 20 feet
Correct answer: 6 inches in the first 10 feet
Most building codes require the grade to slope at least 6 inches downward within the first 10 feet from the foundation to direct surface water away from the structure.
Question 4: What is the purpose of a weep hole in a brick veneer wall?
- Allow air circulation behind the brick
- Drain water that collects at the base of the wall cavity (Correct answer)
- Provide a path for electrical conduit
- Improve brick veneer adhesion to the foundation
Correct answer: Drain water that collects at the base of the wall cavity
Weep holes are open vertical joints at the base of a brick veneer wall that allow any water entering the cavity to drain out rather than accumulate and cause damage.
Question 5: Which foundation type is most susceptible to moisture intrusion because it sits partially or fully below grade?
- Slab-on-grade
- Crawl space with vented foundation
- Full or partial basement (Correct answer)
- Pier and beam
Correct answer: Full or partial basement
Full and partial basements are below grade and are subject to hydrostatic pressure and water infiltration through walls and floor slabs, making moisture management critical.
Question 6: A home inspector observes stair-step cracking in a brick foundation. This pattern typically indicates:
- Thermal expansion of the brick
- Differential settlement of the foundation (Correct answer)
- Normal curing shrinkage
- Impact damage from outside
Correct answer: Differential settlement of the foundation
Stair-step cracks follow the mortar joints in a diagonal stair-step pattern and are a classic sign of differential settlement, where one portion of the foundation has moved more than another.
Home Inspector Test Home Inspector Foundation and Basement Inspection 1
Which type of foundation crack is generally considered most serious in a poured concrete foundation?