What is Blinding in construction?

Blinding in construction refers to a layer of material, typically concrete or a similar substance, that is laid on top of the subgrade before the main structural elements are built. Its primary purpose is to create a smooth, level surface for subsequent construction activities, such as laying foundations or flooring. Blinding also helps protect the underlying soil from moisture and contamination, ensuring a stable base for the structure. Additionally, it can serve as a barrier to prevent the upward migration of soil particles into the concrete.