Manholes · Toronto & GTA
Manhole Restoration & Waterproofing
Joint Seal is a Toronto-based company specialising in concrete repair, restoration and riser joint injection. Industrial-strength concrete adhesives let us perform all repairs from inside the maintenance chamber — ensuring long-lasting results.
- Riser Joint Injection
- Crack Repair
- Patching
- Parging & Coating
- Incrustation Removal
- Step Replacement
Manhole Waterproofing & Rehabilitation
We offer complete manhole restoration by injecting riser joints, repairing cracks, and patching, parging and coating the concrete surface with a chemical-resistant membrane.
The result is lasting waterproofing. Our specialised industrial-strength materials have been tested to MTO standards to last 25 years.
Why Manholes Leak
Tree roots and incrustation are some of the causes of manhole leakage. Cracks and delaminated concrete are another — water from the surrounding environment can infiltrate, overloading sewer capacity.
To ensure complete manhole rehabilitation, several steps may need to be taken, from incrustation removal to crack repair and riser joint injection.
Our Solutions
We remove any type of incrustation and repair damaged manhole walls with our specialised crack repair and patching methods. Complete restoration and waterproofing are achieved through crack repair, patching and riser joint injection.
Steps or ladders are replaced as required, and we can cover up manholes if requested — our specialised materials make adhesion between concrete and metal possible.
Application Benefits
By sealing riser joints and cracks we eliminate infiltration that strains sewage capacity. We inject riser joints between pre-cast and cast-in-place manhole structures and repair cracks to stop leaking.
Our less intrusive method requires no excavation, minimising restoration costs, and the monolithic adhesion of our materials fully restores the concrete surface — rated to MTO standards to last 25 years.
Our Repair Methods
Manhole Rehabilitation
Because we work from inside the maintenance chamber — no excavation — we inject riser joints, repair cracks and coat the walls with a chemical-resistant membrane for lasting waterproofing.
Joint Injection
Riser joints are a weaker area in a concrete surface where leaking can occur. We inject them to stop leakage and provide long-lasting waterproofing.
Crack Repair & Patching
Cracks are repaired with specialised materials that ensure durable manhole repair and waterproofing, and we can reprofile manhole benching.
Where necessary, patches as thin as 5 mm are applied — possible thanks to our industrial-grade adhesives and polymer cement.
Parging & Coating
Once the manhole walls are patched, their surface is parged and coated with a chemical-resistant membrane, which ensures long-lasting concrete waterproofing.
Common questions
Frequently asked questions
Is a leaking manhole a problem?
Yes. Extra water overloads sewer capacity, which is designed for a specific sewage quantity.
What happens if a sewer exceeds capacity?
It can cause overflows, spills, and increased treatment costs.
Can a leaking manhole be repaired instead of replaced?
Yes. We use industrial-strength materials and chemical-resistant membranes for durable waterproofing, all from inside the chamber.
Leaking or deteriorating manhole?
We inject riser joints, repair cracks and coat the walls with a chemical-resistant membrane — all from inside the chamber, no excavation, with lasting results.