What is the typical purpose of weep holes in glazing systems?

Weep holes serve an essential purpose in glazing systems by facilitating the drainage of excess water that may accumulate within the system. These small openings are strategically placed to ensure that any water that penetrates the exterior surface can effectively escape, thus preventing moisture buildup that can lead to potential damage over time. This drainage function is critical for maintaining the integrity of the structure and protecting sensitive components from deterioration caused by water intrusion.

The option focusing on air circulation does not highlight the primary function of weep holes, which is specifically related to managing water. Supporting glass panels relates to the structural aspects of glazing, while holding sealants in place is also not the role of weep holes. Therefore, the choice clearly aligning with the drainage capability reflects the correct understanding of their purpose in preventing water-related issues within glazing installations.