What is prepared before pouring concrete slab above ground?

Before pouring a concrete slab above ground, it is essential to create a proper base to ensure the slab's stability and durability. The preparation commonly involves using Visqueen, sand, and wire mesh.

Visqueen, a type of polyethylene sheeting, serves as a moisture barrier. This is important because it helps prevent moisture from the ground from wicking up into the concrete, which can lead to cracking and other issues over time. The inclusion of sand provides a level base for the concrete slab and helps with drainage.

Wire mesh is then placed within the sand or directly under the slab to provide tensile strength. It reinforces the concrete, helping to resist cracking and improve the overall structural integrity of the slab. By using these components together, the foundation for the concrete slab is effectively prepared, promoting a strong, long-lasting finished product.

The combination of these three materials is critical for ensuring that the slab performs well in various environmental conditions and loads.