CHI Insulation & Ventilation Inspection 3

Question 1

In building science and ventilation assessment, what does the abbreviation 'ACH' stand for?

Accepted Answer

Air Changes per Hour

Answer

Air Conditioning Hours

Answer

Attic Cooling Humidity rating

Answer

Airflow Coefficient of Housing

Question 2

In which building areas should a home inspector pay the closest attention to proper vapor barrier installation to prevent insulation moisture damage?

Accepted Answer

Crawl spaces, basements, and unvented cathedral ceilings

Answer

Interior partition walls between conditioned spaces

Answer

Vented attic spaces above insulated floor assemblies

Answer

Garage ceilings not adjacent to living space

Question 3

Which mechanical ventilation device is most commonly installed in bathrooms to remove excess humidity and odors during and after bathing?

Accepted Answer

Exhaust fan

Answer

Heat recovery ventilator (HRV)

Answer

Energy recovery ventilator (ERV)

Answer

Whole-house supply fan

Question 4

What is the most common visual indicator of chronic inadequate attic ventilation that a home inspector is likely to observe during an attic inspection?

Accepted Answer

Dark staining or moisture damage on the underside of the roof sheathing

Answer

Excessive insulation depth near the eaves

Answer

Missing ridge cap shingles on the exterior

Answer

Improperly placed recessed lighting fixtures

Question 5

What is the primary function of insulation baffles (rafter vents or ventilation chutes) installed in attic rafter bays near the eaves?

Accepted Answer

To maintain a clear airflow channel from soffit vents into the attic, preventing insulation from blocking intake air

Answer

To increase the R-value of blown-in attic insulation near the eaves

Answer

To support the weight of heavy batt insulation against rafter movement

Answer

To reduce radiant heat transfer from the roof deck to the insulation

Question 6

Which insulation material is most commonly recommended for insulating rim joist areas in a foundation due to its combined air-sealing and moisture-resistant properties?

Accepted Answer

Closed-cell spray polyurethane foam

Answer

Unfaced fiberglass batts cut to fit

Answer

Blown-in cellulose

Answer

Rigid expanded polystyrene (EPS) board alone

Question 7

What is the minimum required clearance between attic insulation and non-IC-rated recessed light fixtures to prevent a fire hazard?

Accepted Answer

3 inches

Answer

1 inch

Answer

6 inches

Answer

12 inches