CHI Insulation & Ventilation Inspection

Question 1

What is the minimum recommended R-value for attic insulation in most U.S. climate zones (Zones 4-8) according to Department of Energy guidelines?

Accepted Answer

R-38

Answer

R-19

Answer

R-30

Answer

R-60

Question 2

Which insulation material commonly found in pre-1980s homes is highly fire-resistant but poses significant health hazards when its fibers are disturbed?

Accepted Answer

Asbestos

Answer

Fiberglass batt

Answer

Mineral wool

Answer

Vermiculite

Question 3

What is the primary purpose of a vapor barrier installed on the ground in a crawl space?

Accepted Answer

To prevent ground moisture from migrating upward into the structure

Answer

To prevent radon gas entry

Answer

To insulate the floor above

Answer

To deter pest entry

Question 4

What does 'thermal bridging' refer to in the context of building insulation?

Accepted Answer

Conductive heat transfer through structural elements that bypass the insulation layer

Answer

Heat flowing through air gaps in insulation

Answer

Radiant heat gain through windows

Answer

Moisture migration through insulation

Question 5

Which mechanical ventilation strategy uses both supply and exhaust fans to maintain balanced air pressure within a home?

Accepted Answer

Balanced ventilation

Answer

Exhaust-only ventilation

Answer

Supply-only ventilation

Answer

Spot ventilation

Question 6

What is the minimum net free ventilation area (NFVA) typically required for attic spaces without a vapor barrier, expressed as a ratio of the attic floor area?

Accepted Answer

1/150

Answer

1/75

Answer

1/300

Answer

1/600

Question 7

Which insulation installation method delivers loose material pneumatically through a hose into attic spaces or enclosed wall cavities?

Accepted Answer

Blown-in (loose-fill) installation

Answer

Roll-out installation

Answer

Spray-applied foam

Answer

Rigid board installation