What is slab on grade?

A slab on grade refers to a type of foundation system where concrete is poured directly onto the ground, allowing it to serve as the ground floor of a building. This construction method provides a solid base and is often used in warmer climates where freezing temperatures are not a concern, simplifying the design and construction process.

In this context, a slab on grade provides structural support and is critical in distributing the weight of the building evenly across the ground. It contrasts with other foundation types like basements, which are excavated, or footings, which are foundational elements that support vertical loads. A wall, while necessary in a structure, does not define the fundamental support system of a building, which is the main function of a slab on grade. Understanding this concept is essential for appreciating different construction methods and their implications on real estate appraisal practices.