Cavity

In construction, a cavity typically refers to the hollow space within walls, ceilings, or floors, designed to provide insulation, ventilation, or structural separation. Cavity walls, for example, consist of two layers (or "skins") of brick or block separated by a gap, improving thermal insulation and preventing moisture penetration. This gap acts as a buffer, reducing heat loss in colder climates and keeping interiors cooler in warm weather, contributing to energy efficiency and enhanced comfort within buildings.

Cavities also serve as channels for housing utilities, including wiring, pipes, and ductwork, which keeps essential systems concealed and protected. By allowing for air circulation, cavity spaces reduce condensation buildup and help prevent mold and dampness, extending the building's lifespan. In addition to these practical benefits, cavities play a crucial role in sound insulation, particularly in multi-unit or high-traffic buildings, creating a quieter, more private indoor environment.