Manhole restoration and waterproofing can consist of root and incrustation removal, crack repair and patching, riser joint injection, and step or ladder replacement. Manholes can even be covered, should that be required, because our specialised materials will adhere to both metal and concrete surfaces.
Our industrial-grade materials allow for efficient crack repair, patching, and riser joint injection which eliminates leaks.
Before repairs are done, any incrustation and roots are removed, to eliminate the potential for further damage to manhole walls.
To fully waterproof a manhole, it might be necessary to remove any incrustation or roots, fill in cracks, install patches, parge and coat, and inject riser joints.
As with any other concrete repair, surface preparation is done first: cracked are cleaned out, and any unsound concrete is removed when getting ready to patch. A specialised crack-filling material is used, and patching is done, as required. Manhole walls are then parged and coated with a chemical-resistant membrane. Rise joints – a weaker area where two concrete sections meet – are injected with a polyurethane material.