40 Hour Property and Building Inspection Practice Test

What common problem results from having insulation that is only 2 inches thick?

1. Localized heat loss

2. Inadequate thermal resistance

3. Increased fire risk

4. Reduced air quality

The correct answer is: Inadequate thermal resistance

Inadequate thermal resistance is a significant issue associated with having insulation that is only 2 inches thick. Thermal resistance, often referred to as R-value, measures an insulation material's ability to resist heat transfer. The thicker the insulation, the greater its thermal resistance, reducing heat flow within a building. By having insulation that is only 2 inches thick, the R-value may fall below the necessary levels required for effective thermal performance. This means that the building will not retain heat efficiently during colder months or keep cool during warmer months, leading to higher energy costs and discomfort for occupants. Inadequate thermal resistance can also lead to condensation problems and contribute to mold and mildew growth if moisture is not properly managed. While localized heat loss can occur due to insulation gaps or weak spots, it does not capture the broad issue of insufficient overall insulation thickness. Increased fire risk and reduced air quality, while valid concerns in some contexts, are not directly tied to the thickness of insulation in the same way thermal resistance is affected.