Injection Grouting
Forcing grout under pressure through installed ports into cracks, voids or honeycombed concrete to fill them and block water paths.
On an actual building
It reaches the full depth of a defect, unlike surface filling. Material selection depends on whether the crack is live or dormant and wet or dry.
What we most often have to correct
That the crack face should be left open so you can see the grout. Sealing the face is what forces grout to travel internally instead of escaping.
Terms that come up alongside this one
- PU Grouting
Injection of polyurethane resin that reacts with the water it meets, expanding into a foam or flexible gel and sealing the leak path from within..
- Packer (Injection Port)
A mechanical fitting installed into a drilled hole that seals against the hole wall and provides a connection for injecting resin under pressure..
- Honeycombing
Voids in hardened concrete where mortar failed to fill the spaces between coarse aggregate, usually from inadequate compaction or congested reinforcement..
More repair terms
Injection Grouting — questions we get asked
What does injection grouting mean in waterproofing?
Forcing grout under pressure through installed ports into cracks, voids or honeycombed concrete to fill them and block water paths.
Why does injection grouting matter on a real project?
It reaches the full depth of a defect, unlike surface filling. Material selection depends on whether the crack is live or dormant and wet or dry.
What do people commonly get wrong about injection grouting?
That the crack face should be left open so you can see the grout. Sealing the face is what forces grout to travel internally instead of escaping.
Have a building showing this?
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