Final answer:
Apron flashing is most commonly installed at the downslope side of a chimney, making the statement true. It serves to direct water away from the chimney base, preventing leaks.
Step-by-step explanation:
The answer to the student's question: A common location for an apron flashing is at the front side or downslope side of a chimney. is true. Apron flashing is an essential component used in roofing to prevent water from penetrating the building structure at the intersection point between the roof slope and a vertical protrusion, like a chimney. It is typically installed on the downslope side of the chimney where the chimney penetrates the roof, ensuring that rainwater sheds over the flashing and away from the chimney base, thus preventing leaks into the building.