How to repair manhole covers
Common Reasons for Replacing Manhole Covers
- Damage or Cracks: Over time, manhole covers can crack, corrode, or break due to heavy traffic, weather exposure, or age, creating safety hazards.
- Improved Safety: A secure, level, and non-slip manhole cover helps prevent accidents for pedestrians and vehicles.
- Water Ingress Prevention: Replacing old or ill-fitting covers helps prevent rainwater from entering the drainage system, reducing the risk of blockages or overflows.
- Odour Control: Modern covers often seal better, helping to contain unpleasant sewer or drain odours.
- Upgraded Load Rating: Heavier-duty covers may be needed when driveways or paths are upgraded to withstand vehicles or heavy foot traffic.
- Better Fit & Alignment: Older covers may shift or become loose—new ones provide a more stable, flush fit with surrounding surfaces.
- Aesthetic Improvement: New covers can improve the overall appearance of a driveway, patio, or pathway, especially recessed covers that can be tiled or paved to match the surrounding area.
- Regulatory Compliance: Building works or inspections may require upgrading to covers that meet current safety or access standards.
New manhole cover
The original manhole cover and frame were damaged and no longer safe. I carefully removed the broken parts and installed a brand-new, heavy-duty replacement to ensure long-term durability.
Removing the cover and preparing the base
This old manhole frame was removed and the opening prepared for the new one. I like to use PVA or SBR on the surfaces for a better bond.
This frame fits the opening perfectly. They do come in different sizes so it’s important to measure before ordering.
Mixing the cement
The white solution is SBR mixed with water which enhances the performance of the cement. We mixed a ratio of 3 parts sand to 1 part cement. Materials were supplied by Selco Builders Warehouse.
Care needs to be taken not to drop debris and cement into the manhole, especially for deeper manholes.
Finishing the job
I used a plastic float and a soft brush to finish the surrounding surfaces. The cement is laid level with the frame and sides levelled in. SBR prevents cracking and speeds up setting time.
Tip: If debris falls into the manhole, use a piece of plastic guttering (8-10 inches) with a hole drilled in the middle attached to a stick. Use another stick to push debris onto it and lift it out.
If you would like a manhole cover renewed, please contact us for a free estimate.
More projects on concreting here.
For manhole blockages in Redbridge contact Thames Water.