Waterstop Tortuous Fluid Flow Path
You can quantify the effectiveness of a waterstop by calculating its fluid flow path. The fluid flow path is measured from the waterstop hydraulic side to the dry side. Ribbed waterstop profiles are much more effective than the traditional dumbbell varieties. The series of fins (or ribs) substantially exaggerates the fluid flow path from the hydraulic side to the dry side compared to the older standard dumbbell profiles (see the illustration below).