Negative-side waterproofing

Negative-side waterproofing is applied to the inside subsurface space, in contrast with positive-side waterproofing, which is applied to the outside face of the subsurface building components. Negative-side waterproofing offers its greatest advantages on projects that would otherwise require positive-side solutions to blindside waterproofing problems. Negative-side waterproofing's success in stopping leaks where other systems fail make it the system of choice in repair and remedial work. Negative-side waterproofing materials can be applied to either side of a waterproofed component. Superior durability and repairability give negative-side waterproofing a big advantage over positive-side waterproofing. Negative-side waterproofing generally comprises coatings that seal the interior surface of concrete rather than separate membranes applied to its exterior face. Membrane waterproofing is unsuitable for negative-side waterproofing because the external water pressure can easily disbond the membrane from the wall. idized metallic cementitious coatings dominated negative-side waterproofing throughout the twentieth century.