Which method helps combat condensation in building spaces?

Ventilating concealed spaces is an effective method to combat condensation within building environments. Condensation occurs when warm, moist air comes into contact with cooler surfaces, causing water vapor to cool and condense into liquid. By ensuring that concealed spaces—such as attics, crawlspaces, or wall cavities—are adequately ventilated, you can allow moisture-laden air to escape rather than become trapped. This reduces the potential for condensation to form in these spaces.

Adequate ventilation promotes airflow, which helps maintain a more consistent temperature and humidity level, ultimately minimizing the chances of condensation. This is particularly important in areas that experience significant temperature fluctuations or high humidity.

In contrast, other options may not specifically address the issue of condensation. While increasing window sizes could provide more natural light and potentially improve the overall comfort of a space, it doesn't directly mitigate condensation risks unless accompanied by appropriate ventilation strategies. Continuous insulation is beneficial for thermal performance and overall energy efficiency but doesn't inherently solve moisture issues. Installing heavier roofing materials could change the mass and thermal characteristics of a roof, but without improving ventilation, it may not effectively reduce condensation.