CPD: A Designers' Guide to Type C (Drained) Waterproofing Protection to BS 8102:2022

Newton Waterproofing Systems (John Newton & Company)

Type C, cavity drain waterproofing systems are considered to be the most highly recommended, reliable and risk-free type of waterproofing where an internal environment must be 100% dry. Where it is accepted that water could enter a building, Type C systems work differently from Types A and B in that, instead of holding back water pressure, they depressurise and manage the water away from the structure. This CPD provides insights into how these systems have evolved and developed over the years, how the significant 2022 update to the British Standard for waterproofing has affected the design of Type C systems, and the importance of factors such as maintainability and sustainability.