Understanding Waterstops and BoMetal Waterstop Specifications

Waterstop History

To accommodate varying pressure and movement, most thermoplastic and rubber waterstops come in different extruded profiles, widths and thicknesses. For years the most widely used waterstops were those anchored by having a dumbbell shape at each end, creating a ‘cork-in-the-bottle’ seal when the joint opens. However, this seal is less effective at small joint movements and wider movements. To overcome these issues, BoMetals has manufactured profiles with multiple raised ribs to improve anchoring and sealing performance. 

Choosing Waterstop Size 

Waterstop size (width) is determined by the expected head of water pressure to be encountered at the joint. The general rule of thumb is the larger the size of the waterstop the greater the hydrostatic pressure resisted by the waterstop. 

Typical Structures Requiring Waterstops Include: 

Dams, locks, canals, water reserves and aqueducts

Water and wastewater treatment facilities 

Primary and secondary containment structures

Culverts and tunnels

Storage tanks

Retaining walls

Bridge and deck abutments

Foundations

Slabs-on-grade

Parking garages

PVC Waterstops