Cavity Wall

Definition

A cavity wall is a masonry wall that includes a continuous airspace between its outermost wythe and the remainder of the wall.

Purpose

Cavity walls provide improved insulation, moisture control, and structural stability. The airspace acts as a barrier to heat transfer and prevents moisture from penetrating the interior walls.

Examples of Use

1. Residential Buildings: Constructed to enhance thermal insulation and reduce energy costs.
2. Commercial Structures: Used to improve moisture control and structural performance.
3. Historical Buildings: Implemented in restoration projects to maintain traditional masonry techniques while improving insulation.

Related Terms

• Wythe: A single vertical layer of masonry.
• Insulation: Materials used to reduce heat transfer.
• Masonry: The building of structures from individual units of brick, stone, or concrete.

Notes

Proper design and construction of cavity walls are essential to ensure they perform effectively. This includes adequate ventilation, weep holes for drainage, and selecting appropriate materials to prevent thermal bridging.