The risk of water leakage through below-grade waterproofing systems is an unfortunate reality of foundation construction. Today, owners, designers, builders, and manufacturers are challenged by the design of buildings with deep foundations in demanding groundwater conditions, considering the intent to construct high-performing and dry structures. These intentions are balanced with the reality that perfection in the installation of waterproofing is unrealistic and some potential for leakage typically remains, particularly in conditions exposed to hydrostatic groundwater pressure.
Designers and owners are becoming more aware of the performance and workmanship limitations associated with below-grade waterproofing systems. Despite this understanding, there is a common misperception that any leakage remediation is covered as part of the manufacturer’s warranty. Over the years, manufacturers have been responding to this misperception, and the market’s desire for more comprehensive warranty coverage, by developing warranty options that can better align with project-specific expectations and liability management.