What is a common method for preventing moisture build-up in buildings?

Installing proper drainage and ventilation systems is recognized as a common and effective method for preventing moisture build-up in buildings. This approach addresses the root cause of moisture accumulation, which often results from excess water or humidity trapped within the structure. Proper drainage systems ensure that any water from rain or ground moisture is directed away from the foundation, reducing the risk of leaks and flooding. Simultaneously, adequate ventilation allows for the circulation of air, which helps to keep indoor humidity levels in check by allowing moist air to escape and drier air to enter.

In contrast, relying solely on heating systems may not necessarily control moisture effectively; high temperatures can sometimes result in more humid conditions if not paired with adequate ventilation. Covering windows with film may reduce drafts and slightly improve energy efficiency, but it does not address the underlying moisture issues that can cause mold growth. Reducing water usage throughout the building, while beneficial in some contexts, does not fundamentally address how moisture enters or accumulates within the structure, making it less effective compared to installing comprehensive drainage and ventilation systems.