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Structural waterproofing is a term used to describe any structure with earth retaining walls, such structures include New build (earth Retaining Wall), cellars, Basements, garages, car parks. All the above areas will need to be waterproofed before works commence with the build or as a refurbishment. Basements are prone to cracks in the retaining walls and cellars ‘below the water table’ this means they are ‘vulnerable to hydrostatic pressure caused by water against the wall and floor, this will lead to damp problems.
There are manty modern systems available with drainage pumps being applied within the waterproof system. Tanking is designed to be a tough and durable system and with type A (barrier) protection (BS8102:2009), Type B (structurally integral) protection, Type C (Drained) protection.
Type A is a barrier between the structure and moisture (water) these include external/ internal and sandwich.
Type B protection is from the buildings structure, this is from the materials of the shell and stops the migration and seepage from water ingressing into the fabric, failures mostly consist from penetrations and structural cracks in the building fabric.
Type C is a controlled water management system or a count drain pump, the pump diverts water into a safe point such as a sump/ package pump station. Selecting the right structural waterproofing system must be organised and meet current British Standard guidelines and installing 2 forms of waterproofing this will form a bond between the guarantee of the contractor and the builder/ building owner.
