HydroBond System – External Type A Waterproofing

The British Standard for Waterproofing 8102:2022 is the ‘Code of Practice for Protection of Below Ground Structures Against Water Ingress’ and defines Type A waterproofing as “barrier protection” which is applied to either the internal or external surface of a structure in order to resist the pressure of water trying to enter the building.

Type A membranes are the products that are referred to when people talk about the process of “tanking” a basement in order to protect it from water ingress.

Barrier waterproofing membranes that can be applied to the external ‘positive’ side of the structure include both pre-applied, self-healing sheet membranes, and post-applied liquid membranes that can be linked to the above-ground DPC in order to completely encapsulate, or “tank”, the basement in a continuous waterproof layer.