CHI Insulation & Ventilation Inspection 2

Question 1

What is the primary function of soffit vents in an attic ventilation system?

Accepted Answer

Provide cool intake air at the lower roof edge

Answer

Soffit vents serve as the intake air source at the lowest point of the roof, allowing cool fresh air to enter and push hot, moist air out through ridge or gable vents higher in the attic.

Question 2

Which insulation material provides the highest R-value per inch of thickness?

Accepted Answer

Closed-cell spray foam

Answer

Closed-cell spray polyurethane foam provides approximately R-6 to R-7 per inch, significantly higher than other common residential insulation materials.

Question 3

What roof-related condition commonly results from inadequate attic ventilation combined with excessive heat loss through the ceiling in cold climates?

Accepted Answer

Ice dams

Answer

Ice dams form when heat escaping through a poorly ventilated attic melts snow on the roof surface, which then refreezes at the cold eave and can force water under shingles causing interior damage.

Question 4

When installing faced fiberglass batt insulation in exterior wall cavities in a cold climate, where should the vapor retarder facing be oriented?

Accepted Answer

Toward the warm-in-winter (interior) side of the wall

Answer

The vapor retarder facing must be installed on the warm-in-winter side (interior) to prevent moisture-laden indoor air from diffusing into the wall assembly where it can condense on cold surfaces.

Question 5

What type of ventilation relies solely on natural forces such as temperature differences and wind pressure to move air, without any mechanical equipment?

Accepted Answer

Natural ventilation

Answer

Natural ventilation uses buoyancy (stack effect) and wind pressure differentials to move air through openings in the building envelope without any fans or powered equipment.

(CHI) Certified Home Inspector Practice Test

(CHI) Certified Home Inspector Practice Test

CHI Insulation & Ventilation Inspection 2