International Compliance Association (ICA) Home Inspector Practice Exam

What does a high R-value in attic insulation indicate?

1. Good heat retention

2. Poor installation

3. Replacement is necessary

4. Excess moisture

The correct answer is: Good heat retention

A high R-value in attic insulation signifies good heat retention. The R-value is a measure of thermal resistance, reflecting how well insulation can resist heat flow. The higher the R-value, the greater the insulating effectiveness, which is crucial for maintaining comfortable indoor temperatures and improving energy efficiency. In colder climates, a high R-value means that the insulation is effective at keeping heat inside during the winter months, while in warmer climates, it helps prevent heat from entering the home. This contributes to reducing heating and cooling costs, making a home more energy-efficient. Therefore, a high R-value directly correlates with superior insulation performance and energy conservation, reinforcing why it indicates good heat retention.