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Mass concrete underpinning

Mass concrete underpinning in Hastings

If a structural engineer has recommended mass concrete underpinning for your home, you need to know what the work involves. The specialist firm digs beneath the existing foundation one section at a time, pouring concrete to reach stable ground. Find out how this traditional method works.

  • Traditional pin-by-pin method
  • Suitable for Victorian terraces
  • Dug and poured by specialists
Close-up of underpinning work beneath a brick house with workers in high-vis.

What the signs below your walls mean

A crack or a sticking door can point to several different problems beneath a house. The same symptom might be harmless settlement or active subsidence, so reading the signs correctly matters before any digging begins.

Close-up of underpinning beneath a brick corner wall with workers kneeling.
Diagonal cracks wider at the top
This often points to one part of the foundation sinking lower than the rest. A subsidence survey confirms whether the movement is ongoing or historic.
Doors jamming in their frames
Shifting ground can twist the frame out of square. Measuring the distortion over weeks shows if the wall is still moving.
Gaps opening around bay windows
Bay windows sit on their own shallow footings and sink first when the soil dries out. Specialist assessment determines if underpinning is needed.

What changes the cost of underpinning

Every house sits on different ground, so no two jobs require the same amount of digging, concrete or time. The specialist prices the work after inspecting the site and the soil conditions.

Steel props support a brick wall during underpinning work with gravel below.
Depth to firm ground
The deeper the specialist must dig to find load-bearing strata, the more excavation and concrete each pin requires.
Number of pins needed
A longer affected wall needs more individual sections dug and poured, increasing materials and labour.
Access to the working area
Narrow side returns or restricted gardens slow down spoil removal and concrete delivery, adding time to the job.
Groundwater levels
High water tables may require continuous pumping while the pit is open, which adds equipment and effort.

The specialist explains the full cost of your particular job before any work is agreed.

Foundation repair options in Hastings

A shuttered concrete pit dug beneath a brick house foundation.

Questions about mass concrete underpinning

Is mass concrete the right choice?
A structural engineer recommends it based on trial pits and boreholes showing where firm ground lies. The specialist follows that specification, confirming the soil suits a traditional dig rather than piles or resin injection.
Duration on a three-bed terrace
Underpinning a Victorian terrace in East Sussex typically takes several weeks. The specialist works through the pins sequentially, allowing each pour to cure before excavating the next section alongside it.
Living in the house during work
Most homeowners stay while the specialist works. Noise and vibration are confined to the exterior, though access around the affected wall will be restricted until the final pin cures.
Depth to firm ground locally
How deep underpinning is dug depends entirely on the local geology. In parts of Hastings built on Wadhurst Clay, the specialist may need to excavate significantly further than on sandstone to reach a stable bearing stratum.
Insurance covering the repair
Once a subsidence claim is accepted, buildings insurance usually covers the repair. The specialist provides the detailed quotation your insurer requires to authorise the work.
Working on a shared party wall
Underpinning a party wall requires neighbour consent under the Party Wall Act. The specialist coordinates the sequence so both properties remain supported throughout the dig.

Areas covered around Hastings and Bexhill

Specialist firms carry out mass concrete underpinning across Hastings and the surrounding towns. Each area has its own soil conditions, from the clay near Silverhill to the sandstone of the Old Town, and the method adapts accordingly.

If your town is not listed, send an enquiry to check coverage for your home.

Ask about mass concrete underpinning for your home

Send your enquiry How the stages of repair work