International Compliance Association (ICA) Home Inspector Practice Exam

When should thermal pane windows be replaced?

1. When they are cracked

2. When they are cloudy

3. When the seal is broken

4. When the frame is damaged

The correct answer is: When they are cloudy

The most appropriate time to consider replacing thermal pane windows is when they are cloudy. This cloudiness is typically caused by the failure of the insulating seal between the panes of glass. When this seal breaks, moisture can enter the space between the panes, leading to condensation and a foggy appearance that cannot be cleared through regular cleaning. The cloudiness indicates a loss of the thermal efficiency that thermal pane windows are designed to provide, ultimately impacting energy costs and comfort within the home. While cracked windows, broken seals, or damaged frames may also necessitate replacement, the specific condition of cloudiness directly reflects the window's failure to perform as intended, making it a primary reason for replacement.