Where should apron flashings be installed on a chimney?

Apron flashings are designed to direct water away from the junction between a chimney and the roof surface. They should be installed at the low face of the chimney, where the chimney meets the roof. This location is critical because it ensures that any water flowing down the roof or falling near the base of the chimney will be channeled away, preventing water intrusion under the roofing material and into the chimney structure.

Installing apron flashings at the low face allows them to effectively capture and divert moisture, which protects the roofing system and the chimney itself from potential damage over time. Properly placed apron flashings help in minimizing the risk of leaks, which can lead to more significant problems such as mold growth or structural issues due to rot or deterioration.

Understanding the role of apron flashings within the roofing system underscores the importance of their location, making it clear that the low face of the chimney is the most effective and protective area for their installation.