What is parging?

Parging refers to the application of a thin layer of a cement-based mixture, often containing lime and sand, to the exterior surface of foundation walls. This technique is primarily used for providing a finished look and enhancing the durability of the structure. The parging layer helps to protect the underlying masonry from moisture, improves adhesion for further treatments, and can also provide some insulation benefits. It is a crucial aspect of masonry work in construction, as it contributes to both aesthetic appeal and structural integrity.

The other options do not accurately describe what parging is. Insulation, a waterproof barrier, and framing methods refer to distinct systems and approaches in construction, each serving different purposes that do not align with the characteristics of parging.