Final answer:
In chimney construction, the flue liner tile is required to project at least two inches above the masonry cap to ensure proper drainage and prevent damage.
Step-by-step explanation:
The flue liner tile should project above the masonry cap by at least two inches (2"). This requirement allows for proper protection and prevention of water penetration into the chimney structure. According to building codes and best practices, the projection helps maintain the integrity of the flue liner and masonry cap by facilitating proper drainage and reducing the potential for freeze-thaw damage during colder months.
The flue liner tile should project above the masonry cap to prevent the ingress of water or other debris into the chimney. By extending beyond the cap, the flue liner tile acts as a protective barrier, ensuring that the chimney remains sealed and functional.