NHIE Insulation and Ventilation 2

Question 1

Which insulation material is manufactured primarily from recycled paper products treated with fire and pest retardants?

Accepted Answer

Cellulose

Answer

Cellulose insulation is made primarily from recycled newsprint and cardboard, treated with borate compounds for fire and pest resistance.

Question 2

What is 'thermal bridging' in building construction?

Accepted Answer

Heat transfer through a structural element that bypasses the insulation layer

Answer

Thermal bridging occurs when a conductive material such as a wood stud or metal joist creates a path for heat to bypass the insulation installed between framing members.

Question 3

What fire hazard exists when insulation is placed directly over non-IC rated recessed light fixtures?

Accepted Answer

Heat buildup around the fixture that can ignite surrounding materials

Answer

Non-IC (insulation contact) rated fixtures must maintain clearance from insulation; covering them traps heat that can reach ignition temperatures of surrounding materials.

Question 4

In cold climates, where should a vapor retarder be positioned relative to insulation in an exterior wall?

Accepted Answer

On the warm interior side of the insulation

Answer

In cold climates, the vapor retarder belongs on the warm interior side to stop moisture-laden indoor air from reaching the cold sheathing where it would condense.

Question 5

What is the minimum clearance typically required between non-IC rated recessed light fixtures and attic insulation?

Accepted Answer

3 inches

Answer

Most building codes require a minimum 3-inch clearance between non-IC rated recessed fixtures and insulation to allow heat dissipation and prevent fire hazard.

(NHIE) National Home Inspector Examination Practice Test

(NHIE) National Home Inspector Examination Practice Test

NHIE Insulation and Ventilation 2