Positive Side Waterproofing
Negative Side Waterproofing
The most common use of negative side waterproofing is where access to the outside face is inaccessible or where the source of the problem is impossible or difficult to reach. Examples include pits, shafts, basements, wine cellars, underground parking and retaining walls etc. Shells of ponds and pools are also susceptible to negative water seepage. Negative side waterproofing is generally a testament to poor building practices. Negative side waterproofing materials can also be applied to the positive side of a building. Membrane waterproofing systems are not suitable for negative side waterproofing as the external water pressure (hydrostatic pressure) can easily disbond the membrane from the substrate.