North Carolina Home Inspector Practice Exam

Which of the following practices is advisable for ensuring effective insulation in a home?

1. Never insulate over vents

2. Always use unfaced insulation

3. Seal gaps before insulation installation

4. Insulate walls with a minimum of two layers

The correct answer is: Seal gaps before insulation installation

Ensuring effective insulation in a home involves addressing any gaps that could allow air leakage and reduce the overall performance of the insulation material. Sealing gaps before installing insulation is crucial because it helps to create a more controlled environment within the walls, ceiling, or floors. Air leaks can significantly diminish the energy efficiency of a home by allowing warm or cool air to escape, leading to higher energy bills and uncomfortable indoor temperatures. By sealing any cracks, holes, or openings before installing insulation, you create a tighter building envelope, which maximizes the effectiveness of the insulation material used. This practice not only improves thermal performance but also enhances overall comfort and indoor air quality by minimizing the entry of external pollutants and moisture. Other practices, while they might hold value in specific contexts, do not universally enhance the effectiveness of insulation as sealing gaps does.