Filler slabs are a type of precast concrete slab that are designed to reduce the weight of the slab without compromising its strength. They are a cost-effective alternative to solid concrete slabs and are commonly used in the construction of residential and commercial buildings. One of the key benefits of filler slabs is their ability to reduce the amount of concrete used in construction, which in turn reduces the environmental impact of the building project. Additionally, filler slabs can help to reduce the overall weight of a building.