Specialist Leak Sealing and Groundwater Control Solutions
HB Tunnelling’s expertise covers leak sealing in manholes, tunnels, car parks, buildings and drainage infrastructure, together with soil stabilisation, void grouting and structural repair works.
Our capabilities include all forms of leak-sealing systems. This includes polyurethane and elastomeric gel resin injection, cementitious grouting, hybrid silicate lining systems, and sulphate-resistant cementitious render applications to create seamless, chemical-resistant waterproof coatings.
Protective Lining Systems
We install chemical-resistant lining systems, including hybrid silicate coatings and sulphate-resistant cementitious renders, to create a seamless waterproof barrier. These provide robust protection for brick and concrete manholes, wet wells, pumping chambers, and other below-ground assets exposed to harsh environmental and chemical conditions.
Why Is Manhole Lining Necessary?
Manholes are confined spaces that are highly susceptible to deterioration, especially when exposed to:
Hydrogen Sulphide (Hâ‚‚S) Gas common in Wastewater and Petrochemical Industries
Lactic Acid found in Dairy Industry Effluent
Citric Acid and High-sugar Content from Beverage Production
Acidic and Alkaline Cleaning Agents
Manhole Failure and Rehabilitation
Over time, these conditions cause corrosion, structural damage, and significant operational risks. Our lining solutions restore structural integrity, prevent infiltration, and minimise long-term maintenance costs.
Common Issues Leading to Manhole Failure
- Low flow rates encouraging gas formation
- Stagnant water causing corrosive reactions
- Acidic or alkaline degrading concrete and brickwork
Our lining systems can refurbish deteriorated manholes and chambers at a fraction of the cost and disruption of full replacement.
