ABSTRACT
The proliferation of complex new materials steadily increases the challenge of specifying the most appropriate waterproofing product or system for specific projects. Choosing the most appropriate method of waterproofing is critical due to the extremely high expense caused by below-grade waterproofing failure. Perhaps the most common mistake in waterproofing specifications is verbatim copying of a manufacturer's specification. Every waterproofing project has unique aspects that require customized specifications. The typical waterproofing project involves at least four principals, architect/engineer (A/E), manufacturer, general contractor, and waterproofing contractor. Require the waterproofing manufacturer to review soils reports and to state in writing that the soil chemicals will have no adverse effects on the waterproofing. The primary exceptions are for waterproofing on plazas surfaced with pavers on pedestals. On membranes under pressure slabs, remove mud and other contaminants from surfaces designed for waterproofing. Require delay in installation of protection boards on one-component, liquid-applied waterproofing until membrane has fully cured.
