Why is it important for the first course of bricks to be aligned and level?

The alignment and leveling of the first course of bricks are crucial for stability and structural integrity because this foundational layer acts as the point of reference for the entire masonry structure. If the first course is not properly aligned and level, it can lead to unevenness in subsequent courses, resulting in walls that may lean or even collapse under their own weight over time. A level foundation ensures that the load is evenly distributed across all bricks, preventing localized stress that could cause damage. Proper alignment also helps maintain the aesthetic appeal of the structure, as any deviations would become more pronounced as the wall rises. This foundational aspect is essential not only for durability but also for safety, making it a vital step in any masonry work.