Why is knowing the finish grade line important in masonry?

Knowing the finish grade line is crucial in masonry primarily to ensure proper drainage. This line is the level at which the final surface will be set, and it influences how water is directed away from structures. If the finish grade line is not established correctly, water can accumulate around the foundation, leading to potential issues like erosion, flooding, and damage to the masonry work over time. Proper drainage helps maintain the integrity of the structure and prolongs the lifespan of the masonry elements.

While calculating material costs, determining aesthetic layout, and setting foundation depth are important considerations in masonry, they do not directly relate to the implications on water management that the finish grade line addresses. Understanding the finish grade helps masons and builders create effective drainage solutions, ultimately enhancing the stability and reliability of the built environment.