Structurally integral protection against water ingress & barrier protection against water ingress

Type A  Waterproofing System

Type A waterproofing is classified in BS8012 as a barrier protection against water ingress which is dependent on a separate barrier system, applied to the structure. Varying types of bonded sheet membranes are typically used.

Type B Waterproofing System

Type B waterproofing is classified in BS8012 as a structurally integral protection against water ingress, which is provided by the structure. Structures providing Type B protection should be constructed of reinforced concrete of structural steel and designed in accordance with the relevant part of BS EN 1992 (all parts) respectively. This type of waterproofing protection is actually integrated into the concrete structure and typical products used include water resisting admixtures compiling with Table 9 of BS EN 934-2:2009 (Admixtures for concrete, mortar and grout) for watertight concrete combined with appropriate joint sealing systems for connections, construction and movement joints.