Parking decks, plant rooms and basements need a system that performs under continuous ground pressure, not just after a dry season. The specification follows a site assessment of the structure, water table and drainage conditions.
Above-ground waterproofing deals with surface water; below-ground waterproofing deals with water under pressure. A parking deck or basement wall has groundwater actively pushing against it during and after rain; the system has to resist that pressure continuously, not just shed water that runs over it. A system specified for above-ground use will fail early in this condition.
A continuous waterproof barrier applied to the structure, either to the positive face (external, before backfill) or the negative face (internal, after construction). Cementitious and crystalline systems applied internally are the practical choice when the external face is inaccessible. They work by reacting with moisture in the concrete or masonry substrate rather than relying on a surface-applied coating that water can find a path behind.
A cavity drainage membrane collects and redirects groundwater rather than blocking it outright. This is the appropriate system where continuous hydrostatic pressure is high, the structure has limited resistance, or where tanking alone cannot guarantee a fully dry environment. Water is managed and discharged to a sump rather than stopped at the wall face. Both approaches have a place; the structure and water conditions determine which is right.
Most tanking failures occur not at the flat faces of walls and slabs, but at construction joints, tie-hole repairs, pipe penetrations and slab-to-wall junctions. These are the points where water finds a path if the application is not methodical. A correctly specified system that is poorly applied at these details will fail as surely as a wrong specification. Both the product and the application quality matter. The work is documented in a written scope before it starts.
Basement and parking deck ingress is a common maintenance issue in multi-storey residential and commercial buildings across Johannesburg, and one that rarely resolves on its own. Trustees who appoint a contractor to work on their building carry personal legal liability under OHSA Section 37 if that contractor is not properly qualified. Sky Rig is SANS 10333 compliant; compliance documentation is ready before mobilisation, not assembled on request after the fact. Quotes are structured for trustee or managing agent sign-off: fixed price, written scope and specification, nothing added at invoice stage. Compliance certificates are discussed at quote stage. Most work is carried out without disruption to residents using the parking structure.
Send us the details and we will assess the structure, specify the right tanking system, and quote a solution built to perform under real hydrostatic pressure, not just after a dry season.
Basement tanking is the application of a waterproofing system to a below-ground structure to prevent water ingress under hydrostatic pressure. Unlike above-ground waterproofing, the system has to resist water being actively pushed through the structure by ground pressure, not just surface water running over it.