Which statement about humidity and condensation risk in tropical climates is true?

• A. Condensation is not a concern in tropical climates.
• B. High humidity increases condensation risk unless surfaces are moisture barriers.
• C. Humidity always prevents condensation.
• D. Condensation only occurs outdoors.

Answer: (B)

Humidity in tropical climates plays a direct role in condensation risk. When air is humid, it contains more water vapor, and condensation occurs when that moist air comes into contact with a surface that is cooler than the air’s dew point. In tropical settings, outdoor and indoor spaces often have high moisture loads, so surfaces—especially cooler ones like certain walls, glazing, or air-conditioned surfaces—are prone to condensation unless moisture movement is controlled. Implementing moisture barriers helps limit the amount of moisture that can reach those cooler surfaces, keeping surface temperatures and humidity levels from dropping below the dew point and thus reducing the chance of condensation. That’s why the statement about high humidity increasing condensation risk unless surfaces are moisture barriers is the correct one.

Condensation can occur indoors, not just outdoors, and humidity does not prevent condensation; it increases the likelihood of it when surfaces are cooler than the dew point.