How are gable vents commonly installed?

Gable vents are typically installed at the peak of a roof, which allows for efficient ventilation of the attic space. This placement takes advantage of the natural airflow created by temperature differences, enabling warmer air to escape from the attic and helping to regulate temperature and moisture levels in the home. Proper installation at this point is critical to prevent issues such as mold growth and heat buildup, which can occur when air circulation is insufficient.

The other options lack the standard application for gable vents. For instance, flat roofs are usually managed differently, often utilizing different types of vents suited to their design. Vents installed on the sides of a building are not categorized as gable vents and typically serve separate purposes. Finally, attaching vents to windows does not align with their intended function, which focuses on facilitating airflow at the top of a structure rather than through windows. Thus, the placement at the peak of the roof is essential for achieving the desired ventilation effect.