Structural Waterproofing
Whilst rising dampness above ground level can be eliminated by injecting a chemical damp-proof course, areas below ground level will need to be tanked or structurally waterproofed.
This form of waterproofing forms a vertical barrier, which stops the dampness penetrating into the interior of a property.
Specialist plastering can be used to 'tank' small areas, e.g. where the exterior ground levels are higher than the internal floor line and it is impossible for these to be lowered. However, basements and larger areas will need to be structurally waterproofed by means of installing special membranes.
Gullivers use a Cavity Drain Membrane system for their structural waterproofing. A Cavity Drain Membrane is a drained waterproofing system, classified by BS8102 as a 'Type C' method of waterproofing. These types of membrane systems are used to waterproof both new build and existing structures, and are used extensively to waterproof structures where Tanking has failed.
The installation of a full Cavity Drain Membrane system would achieve a dry environment performance level (grade 3) as highlighted in Table 1 of the BS 8102.
