Basement tanking are bonded Type A waterproofing is a waterproofing method used to protect basements or other below-ground structures from water ingress. It involves applying a waterproof barrier to the walls and or floors of a basement or retaining structure to prevent moisture or groundwater from seeping through the structure. This process is essential in areas with high water tables, heavy rainfall, or where basements are prone to damp or flooding.

A basement or retaining structure is a below ground structure that has an internal level lower than the external ground level, the structure could be subject to hydrostatic pressure and basement tanking can help to prevent the free passage if water ingress. Depending on the grade or use of the space, tanking can form part, or all of a waterproofing system.

With careful preparation of substrates Cementitious Tanking systems are applied to the internal face of a retaining structure, effective in helping to prevent the passage of moisture into a building.

Cementitious tanking when installed with a Cavity Drain System can be used as part of a waterproofing system to provide a grade 3 space.