Installation of approved polyvinyl chloride (PVC) waterstops at designated concrete construction joints, movement joints, and other specified locations.

PVC waterstops are selected according to the joint configuration, anticipated movement, water pressure, concrete geometry, and product requirements. Proper positioning and secure fixing are essential to prevent displacement during concrete placement.

Installation of specified rubber waterstop profiles for suitable structural joints where the selected product is compatible with the design and service conditions.

Selection may consider movement capacity, joint geometry, exposure, durability, and compatibility with adjoining materials. Product-specific installation procedures must be followed.

Installation of water-activated, expanding waterstop profiles at approved construction joints where this type of system is suitable.

Hydrophilic waterstops expand when exposed to water and help seal the joint. Their installation requires suitable substrate preparation, secure fixing, correct placement, and protection against premature swelling before concrete placement.

Waterstop installation at designated construction joints formed between successive concrete pours, including selected locations in:

• Basement walls and slabs
• Retaining walls
• Raft foundations
• Water tanks and reservoirs
• Lift pits and service pits
• Other concrete structures specified in the design

Installation of specified joint fillers and sealants to accommodate the intended movement and provide the required surface seal.

Material selection depends on joint width, movement range, exposure conditions, substrate compatibility, and the intended service environment. Backer rods, primers, bond breakers, and other accessories may be used where required by the approved system.

Inspection and rectification of identified installation defects where an approved repair method is available.

Potential activities include reviewing displaced or damaged waterstops, incomplete sealant application, defective joint preparation, and discontinuities in the installed system. Repairs must be based on the cause and extent of the defect rather than relying on surface sealing alone.