What is a cavity wall?

A cavity wall is a type of wall construction commonly used in buildings, especially in colder climates. It consists of two separate walls, known as the inner leaf and the outer leaf, with a cavity or gap between them. The purpose of the cavity is to improve insulation and prevent water penetration.

Cavity walls are typically made of brick or concrete block, with insulation material such as foam or mineral wool placed in the cavity. This insulation helps to regulate the temperature inside the building, making it more energy-efficient and reducing heating and cooling costs.

The cavity also serves as a barrier to moisture, preventing water from seeping through the walls and causing damage to the building structure. In areas with heavy rainfall or high humidity, cavity walls are essential for maintaining the integrity of the building.

It is important to ensure that the cavity is properly ventilated to prevent the build-up of moisture and mold. Regular inspections and maintenance are also necessary to ensure the continued effectiveness of cavity wall construction.