Expansion and construction joints (Swellbar & PVC waterstop)
Common issues and queries you can face
Step by step solution
Uneven wet surfaces should be even, and hardened rough surfaces should be smoothened with the appropriate grinding machine, to install the swellable water stops.
PVC waterstops are installed within the reinforcing steel before concreting. During concreting, one part is immersed in concrete while the other is kept free until the second phase of concreting takes place. Use steel nails for fixing, a 25 to 30 cm interval is necessary between nails. PVC Waterstops are tied to the reinforcement steel bars with steel wires through the holes in the perforations in the waterstop. Regarding the swellable waterstop, overlap joints in the strips should be made at least 75 mm. Butt-joined is also acceptable but has to be carefully stuck down with mastic.