Construction Joint Sealing
Wherever two separate concrete pours meet, there's a seam — and seams are where water finds a way in.
What it is
A construction joint is the seam formed where one concrete pour stops and a new one begins, common in large slabs, walls and multi-stage construction. Unlike expansion joints, these aren't designed to move — but the seam between the two pours is rarely perfectly bonded, making it a common point of water entry.
How it works
Depending on the joint's condition, treatment ranges from routing and sealing the joint line with a flexible sealant to injecting waterstop grout along the seam. In new construction, a waterstop strip is often embedded in the joint before the second pour to prevent the issue altogether.
When it's used
- Basement and podium slabs cast in multiple stages
- Retaining walls with visible seepage tracking along a horizontal seam
- New construction, where waterstops can be embedded proactively
Advantages
- Directly addresses one of the most common structural leak points
- Can be applied proactively during construction or remedially after
- Restores continuity to the waterproofing barrier across the seam
Not sure which system your problem needs?
The right system depends on your specific site condition. Show us the problem and we'll confirm the right approach.
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