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.
On an actual building
It uses the water present rather than needing a dry substrate, so it is the standard technique for actively running leaks in basements, lift pits and retaining walls.
What we most often have to correct
That it repairs the structure. It seals the path; it adds no strength and does not address why water is there.
Where this comes up in our work
Terms that come up alongside this one
- Injection Grouting
Forcing grout under pressure through installed ports into cracks, voids or honeycombed concrete to fill them and block water paths..
- 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..
- Hydrostatic Pressure
The pressure exerted by standing water against a structure, increasing with depth below the water level..
More repair terms
PU Grouting — questions we get asked
What does pu grouting mean in waterproofing?
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.
Why does pu grouting matter on a real project?
It uses the water present rather than needing a dry substrate, so it is the standard technique for actively running leaks in basements, lift pits and retaining walls.
What do people commonly get wrong about pu grouting?
That it repairs the structure. It seals the path; it adds no strength and does not address why water is there.
Have a building showing this?
If a term on this page describes something you are looking at, a site inspection will tell you how far it has gone and what it needs. It costs nothing.
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