18 February 2026 What is an air brick and how do they prevent condensation and damp? Written by Nicholas Donnithorne An air brick is a specialised ventilation brick installed in external walls of buildings, often made from clay, plastic or cast iron. Air bricks improve ventilation and reduce moisture build-up inside wall cavities and under floors. If an air... Read More about What is an air brick and how do they prevent condensation and damp? Condensation, Damp Proofing air brick, condensation, damp, ventilation Leave a Comment