How to build a water-tight cavity brick wall (Extended training)

The Clay Brick Association of Southern Africa describes how to build a clay brick cavity wall to improve insulation and energy efficiency. What is a cavity wall? A cavity wall is composed of two masonry walls separated by an air space or cavity. A well-designed cavity wall built from a high-density masonry material like clay brick offers two key benefits: 1) It provides excellent insulation from temperature extremes and noise. 2) The cavity prevents water from condensation from penetrating into the inner leaf. https://www.claybrick.org/tn37-how-bu...