Construction Joint Leakage: Treat the Interface, Not Just the Surface
Cold joints and construction joints create discontinuities where water can find a path through concrete. Repairing the visible damp patch rarely solves the source.
Continuous wet line follows a wall-slab or lift joint.
Use the site evidence to agree a project-specific method with the responsible engineer, concrete producer, manufacturer or specialist applicator.
Continuous wet line follows a wall-slab or lift joint.
Trace the joint, waterbar position if known, concrete defects and hydrostatic head.
Discontinuous waterbar, poor compaction or joint preparation can create connected voids.
Design joint injection, external treatment or another compatible repair for access and pressure.
Prepare and seal the interface; use approved ports or details and keep an injection record.
Check performance during groundwater rise and inspect adjacent joint sections.
Patching the inside face may redirect water to the next weak point.
References inform the topic; they do not endorse a specific product for this project.