01992 523 523MENU

Combined system

type a waterproofingTo achieve a Grade 3 environment you can combine two or more types of protection. Combining a Type A, B and C is the most reliable system as it controls and manages the water/water vapour entering the structure. To help slow down the ingress of water into the structure a Type A system can be used, ideally on the external walls and on new builds underneath the slab, as well as using water bars and a crystallization system at construction joints (Type B protection). Click the technical drawing on the right to view a typical external Type A detail.

For existing structures this can not always be achieved, access to the external walls is sometimes restricted or too costly to excavate, therefore in this case applying a Type A system internally would be sufficient.

type c waterproofing

The Type A and B protection reduces the amount of water entering the Type C system lowering the pumping cycles saving electricity and maintenance costs.

Click the technical drawing on the left to view a typical internal Type C system.

See below our combined system details showing DualProof under the slab, Koster Deuxan and Delta Geo-Drain on the external walls and the Delta System 500 internally.

Technical drawings


For any queries on cellar drainage equipment, basement waterproofing solutions or structural waterproofing systems please contact us.

Get in touch