ASHI Attics & Crawl Spaces 2 — Questions and Answers
Question 1: An inspector notices that attic insulation is blocking the soffit vents. What is the primary concern?
- Pest entry through the open soffit area
- Reduced airflow causing moisture and heat buildup in the attic (Correct answer)
- Insulation degradation from exposure to outdoor air
- Increased risk of ice dam formation on interior surfaces
Correct answer: Reduced airflow causing moisture and heat buildup in the attic
Blocked soffit vents restrict the intake of fresh air needed for ventilation, trapping heat and moisture and potentially causing roof damage.
Question 2: Which of the following best describes the purpose of a vapor retarder in a crawl space?
- To insulate the floor above the crawl space
- To prevent ground moisture from evaporating into the crawl space air (Correct answer)
- To act as a fire barrier between the crawl space and living area
- To protect pipes from freezing during winter months
Correct answer: To prevent ground moisture from evaporating into the crawl space air
A vapor retarder limits evaporation of ground moisture into the crawl space, reducing humidity, wood decay, and mold growth.
Question 3: During an attic inspection, an ASHI inspector identifies active wood-boring insect damage to the roof framing. What should the inspector do?
- Apply a pesticide treatment immediately
- Document the condition and recommend evaluation by a qualified pest control specialist (Correct answer)
- Remove damaged wood members to assess structural integrity
- Mark the damage with spray paint for the client
Correct answer: Document the condition and recommend evaluation by a qualified pest control specialist
ASHI inspectors document conditions and recommend specialists; they do not treat, repair, or alter components during inspections.
Question 4: What type of attic ventilation is considered most effective because it creates a continuous flow from soffit to ridge?
- Power attic ventilator (PAV) only
- Passive gable-end vents only
- Balanced soffit and ridge ventilation system (Correct answer)
- Turbine vents installed at the roof peak
Correct answer: Balanced soffit and ridge ventilation system
A balanced system with soffit intake and ridge exhaust creates a natural convective airflow loop, which is the most effective passive ventilation method.
Question 5: An inspector finds rust stains on the crawl space structural members and standing water in one corner. Which additional system should the inspector evaluate most carefully as a result?
- The electrical panel for corrosion
- The site grading and drainage around the foundation (Correct answer)
- The attic ventilation above the crawl space
- The roof covering for missing shingles
Correct answer: The site grading and drainage around the foundation
Standing water in a crawl space is typically caused by poor site grading or drainage directing water toward the foundation.
Question 6: What is the purpose of baffles (vent chutes) installed in an attic?
- To redirect wiring away from insulation
- To maintain an air channel between the insulation and roof sheathing above the soffit vents (Correct answer)
- To support the weight of blown-in insulation on the attic floor
- To prevent animals from entering through the ridge vent
Correct answer: To maintain an air channel between the insulation and roof sheathing above the soffit vents
Baffles create a channel that keeps soffit vent airflow open even when deep insulation is installed, ensuring proper ventilation.
Question 7: An inspector discovers that the crawl space has no mechanical ventilation and the foundation vents are permanently sealed. Which condition would make this acceptable?
- The crawl space has a concrete floor instead of soil
- The crawl space is fully encapsulated with a sealed vapor barrier and conditioned air supply (Correct answer)
- The floor above the crawl space has R-19 insulation installed
- The crawl space ceiling height exceeds 4 feet
Correct answer: The crawl space is fully encapsulated with a sealed vapor barrier and conditioned air supply
A fully encapsulated, conditioned crawl space is an accepted alternative to vented crawl spaces when properly designed and implemented.
ASHI Attics & Crawl Spaces 2
An inspector notices that attic insulation is blocking the soffit vents.
What is the primary concern?