Internally-Applied Basement Waterproofing Systems

Internally-applied basement waterproofing systems are most commonly used on basement conversion projects. However, they are also utilised on newbuild basement projects where it is difficult to apply a waterproofing system externally - e.g. due to the proximity of neighbouring buildings.

An advantage of internally-applied basement waterproofing systems is that they are usually easier to access for the purposes of repair and maintenance than externally- applied waterproofing systems.

The basement waterproofing system shown in the diagram below is the Oldroyd Xv cavity drainage system. This waterproofing system consists of a dimpled plastic membrane (Oldroyd Xv) which is fixed to the walls and floors of the basement. This forms a "drained cavity" which redirects any water entering the basement into an Aquadrain perimeter drainage channel (shown in green on the diagram). The Aquadrain drainage channel leads to a sump and pump that removes the water from the basement.

Alternatively, a cementitious "tanking" system such as Vandex BB75 can be used. This is applied to the internal walls of the basement by trowel or spray. Rather than redirecting the water, it forms a physical barrier - preventing any dampness from entering the basement. For this reason a sump and pump are not required. For further information on internally-applied basement waterproofing systems, see our cellar conversions page.