Manhole Linings

Total Specialist maintenance are a specialist Manhole lining contractor Providing solutions for the refurbishment, preventative enhancement of existing or newly constructed concrete/brickwork manhole and chamber structures. Total specialist maintenance provides manhole lining services on a national basis in vast number of market sectors.

Total specialist maintenance carry out all forms of chemical resistant lining systems which includes Hybrid silicate lining system and sulphate resistant cementitious render systems to form a seamless chemical resistant waterproof coating system.

Total specialist maintenance carry out chemical resistant linings to Brick, concrete manholes, wet wells and pumping chambers


Manholes are defined as a confined space and can suffer from both neglect over the years and also serious chemical attack from hydrogen sulphide gas within both water and petrochemical industries. Other market sectors where manholes can suffer from degradation is the dairy industry due to the build-up of lactic acids, Alcohol and soft drinks manufacture due to the high sugar and citric contents and washing down and cleaning of plant and equipment within the manufacturing industries where acid and alkaline solutions are used in the cleaning process and then processed through effluent drainage systems. 

Problems that lead to manhole lining

Low flow rates

– these can lead to large amounts of gas being formed.

Stagnant water

– can be the catalyst to chemical reactions between water and oxygen.

Hydrogen sulphide gas (H2S)

– problems can arrise from odour and corrosion

Acid and Alkaline chemical attack

– problems occur due to the degradation of the substrate .

Manholes that have suffered from years of neglect and chemical attack can be completely refurbished with a high-quality lining at a fraction of the cost, avoiding the inconvenience of replacing the whole manhole chamber.

All of our Operatives are familiar with the risks of confined spaces in contact with wastewater and are breathing apparatus (BA) trained with the appropriate safety practices providing a safe manhole lining refurbishment service.


What to expect from manhole lining

On completion, the manhole lining will be:

  • Leak tight from manhole water infiltration
  • Chemical resistant to degradation
  • Smooth to avoid trapping debris that causes re-occurring blockages within the system.

What we excel in

  • Hydrogen sulphide gas (H2S) resistant manhole liners
  • Coatings resistant to a range of trade effluent
  • Structural rebuilds of defective manholes and lining systems
  • Leakage resistant & water infiltration solutions
  • Environmentally friendly solutions


Directly Employed Workforce

Highly Skilled and Experienced Operatives

Certified Training


Accreditations: CHAS
Accreditations: SMAS Safety Management Advisory Services
Accreditations: Safe Contractor
Accreditations: Constructionline
Accreditations: Builders Profile

Ask Questions

Technical Questions About
Manhole Lining

Frequently asked questions about Total Specialist Maintenance Manhole lining for domestic, highways, water industry and food and drink industry technical queries regarding Manhole lining

For any additional information that is not listed please contact our technical team

Structural rehabilitation & protective coatings provide a cost effective, permanent seal against corrosion, infiltration and exfiltration – in less time than it would take to replace your structures

Silicate hybrid system

Often specified for manhole rehab projects, the system is also terrific for lining newly installed structures when high head pressure or high H2S is anticipated. The system’s primary technology is a high-build, silicate hybrid system. The system is often used where existing structures have been subjected to H2S gas attack and the cement compound has been eroded leading to the requirement for a full structural refurbishment using R4 concrete repair mortars.

Older manholes were made from engineering and vitrified brick that have excellent resistance to chemicals and in particular sulphuric acid, formed from the H2S gas generated by microbiological activity in sewage. These bricks were excellent when first used in the construction of manholes. Unfortunately, the cement mortar mix used to bond the bricks together has poor resistance to H2S and chemical attacks, the mortar joints are attacked by the chemicals and any H2S gas generated and the mortar can be significantly reduced its strength and consequently affect the bonding of the bricks and the structural integrity of the manhole.

Similarly, chemical and H2S attacks on unprotected concrete manholes react in the same way, attacking the cement in the concrete and reducing its strength, dissolving the bond between the aggregate, sand and cement mix resulting in eroding the surface and exposing rebar in some extreme cases.

The symptoms of this type of damage to manholes are displayed as infiltration issues (through brick joints, concrete ring joints, penetrations) causing overcharging of the downstream treatment plants, exfiltration leading to pollution and environmental issues, structural failure, damage or complete destruction to the concrete benching and pipe connections, wash out of backfill and surrounding ground subsidence.

Our silicate lining system performs well on both concrete and brick manholes

Our silicate lining System is equally well suited to the protective lining of new structures and the rehabilitation of older structures.

Because our silicate lining system is moisture tolerant, the manhole can be returned to service immediately after the product is cured. For exact cure times refer to our technical data sheet for our silicate lining system

Our silicate lining system can be used for the rings. It is designed to provide a seal at the grade-adjustment ring sections of manholes and the catch pits

Total specialist maintenance manhole lining system also involves structural repair where required which involves the removal of defective concrete the substrate is then mechanically prepared using grit blasting techniques and then the manhole is rebuilt using an R4 concrete repair mortar.

Simply coat the walls around the steps. It is recommended that the steps be covered during the coating process to keep them clean and free of our system