Construction joint
Joint formed where concrete placement stops and later continues, requiring structural and waterproofing continuity.
What a construction joint is
A construction joint is created where one concrete pour stops and the next pour starts. It can be safe and durable when planned, cleaned, keyed, reinforced, and waterproofed correctly.
Why unplanned joints are risky
A rushed or accidental cold joint may interrupt load transfer, create a leakage path, or become a crack line. Once hidden, the defect can surface as dampness, movement, or finish cracking.
What to verify
- Joint location is intentional and approved.
- Surface preparation, reinforcement continuity, and waterstop or waterproofing detail are complete.
- The joint is recorded before the next pour or finish layer hides it.
Used in project stages
Explore in the product
- Foundation & underground works: Stage guide 路 Checklist 路 Mistakes and cost
- Structure & vertical envelope: Stage guide 路 Checklist 路 Mistakes and cost
- Waterproofing & wet areas: Stage guide 路 Checklist 路 Mistakes and cost
See also
Related cost packages
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ST1-FND-CONC-003Foundation concrete & reinforcement -
ST2-STR-JOINTS-007Junctions & embedded elements -
ST5-WP-JOINTS-005Waterproofing joints & tapes