the products that are referred to when people talk about the process of “tanking” a basement to protect it from water. Waterproofing barrier membranes that can be applied to the internal ‘negative’ side of the structure include a variety of liquid-applied membranes or slurries that can be installed either by spray machine, trowel, brush, or by roller directly onto the internal wall surface.

These membranes must actively hold back any ingressing water, so it is crucial to select the correct product and to ensure that the substrate is prepared correctly.