Amidst the hustle and bustle of modern urban life, there exists a silent hero, often overlooked yet indispensable in its functionality—the air-conditioning slab. Nestled atop buildings, it withstands the scorching sun's relentless assault while keeping interiors cool and comfortable. However, beyond its cooling prowess lies a crucial element often underestimated—waterproofing. The air-conditioning slab's efficacy hinges not only on its ability to chill the air but also on its capacity to withstand nature's elements. As we journey through the labyrinth of this essential construction facet, we unravel the layers that safeguard our modern comforts from the elements, ensuring our environments remain cool, dry, and conducive to our daily lives.