Subsidence repair resin injection in Greater London
Resin injection for London properties where voids beneath a footing need filling without major excavation.
What Subsidence repair resin injection involves and when it applies
Resin injection work across Greater London properties: how expanding resin closes voids and stabilises the ground beneath foundations with limited disruption to the site.
Resin injection works by forcing an expanding two-component resin through narrow holes bored into or next to the footing, firming up the ground below. The expanding resin closes voids, bonds loose soil particles and can raise a settled slab back toward its original position. With no major excavation required, the work causes considerably less disruption than conventional underpinning, and the ground firms up promptly as the resin cures.
The method is well suited to cases where voids have opened beneath a concrete floor or strip footing, commonly because a leaking drain has carried fine soil away from under a Greater London property. The technique does not fit every subsidence situation, and a structural assessment must be carried out before any repair method is selected. Where deep London Clay shrinkage is the primary cause, resin injection is unlikely to be the right answer. The ground conditions and the pattern of movement are checked by a specialist, who then advises on whether resin injection suits your particular case. Once the specialist has completed that assessment, a quote can be provided.
Does your property show these signs?
Subsidence is linked to shrinkable clay where localised ground loss has occurred beneath the footing
A section of pipe running under a concrete slab has failed and opening up the full area is not feasible
Access to the site is restricted and a less invasive method is needed to reach the affected ground
Cracking appears at one or two corners rather than running across the whole structure
A structural engineer has attributed settlement to voids or loosened material under a slab or footing
The property is listed or historic and traditional mass-concrete underpinning would cause unacceptable disturbance to original fabric
Steps a specialist follows for Subsidence repair resin injection
Ground probing
The specialist tests the soil under the footing or slab to find how deep the weak layer runs and where it ends.
Hole drilling
Narrow holes are drilled at set spacings along the wall or across the floor, so little is dug up.
Resin placed
Resin is pumped in stages and swells to bind loose soil, with the specialist watching how the building reacts.
Level check
Final levels are read against the first ones, the holes are filled and the surface is left clean.
Helping property owners across Greater London
- Price confirmed in writing. The specialist sets out every cost on paper before a single day's work is scheduled.
- Findings you can keep. The specialist records the cause and extent of movement in a written report.
- Specialists who know Greater London. Firms covering Greater London understand the clay soils, drainage history.
- Decide in your own time. Read the figures, raise any questions you have, and go ahead only when you are satisfied.
What's included
- Probing to find loose or weak soil
- Small holes drilled to the depth of the weak layer
- Expanding resin placed in measured amounts
- Level readings taken while the resin goes in
- Holes sealed flush with the surface
Most resin injection jobs on a Greater London residential property wrap up within one to three days on site, with the exact duration set by the size of the affected zone and how many injection points the ground conditions call for.
Factors to weigh up before opting for resin injection
When this method applies
Resin injection is appropriate where settlement has been caused by voids or loosened subsoil rather than a failure of the footing structure itself, and it tends to be selected where access is restricted, where open excavation would affect neighbouring buildings, or where the property is occupied and disruption at surface level must be limited.
Soil conditions and whether the method fits
Resin injection performs well in loose sandy or silty soil and in situations where voids have formed beneath a concrete slab. Where deep shrinkable clay under a Greater London property has not finished drying, the specialist may recommend an alternative method or combine resin injection with a supplementary technique. Soil conditions are established before any injection work starts.
Tracking movement during the lift
The specialist tracks structural movement during the work using level readings. Resin goes in at controlled intervals, raising the structure in small steps toward the target position. Going too far creates problems comparable to the original settlement, so readings are taken between each injection stage.
Where resin injection is not appropriate
Resin injection is unsuitable where foundation failure is severe and load-bearing walls have moved by a significant amount. Any drain fault or active clay shrinkage needs to be resolved before or at the same time as any lifting work, or the ground movement will resume after the repair.
Subsidence repair resin injection across Greater London
Specialists take on subsidence repair resin injection across Greater London, with work in Barking and Dagenham · Barnet · Bexley · Brent · Bromley · Camden · City of London · Croydon and many more areas; pick a town to read about ground conditions and what the work involves there.
Related subsidence repair services
Effective subsidence repair work follows a logical order: investigate to establish the true cause, monitor where movement needs confirming, then apply the right remedy, which may be drainage repair, tree management, resin injection or, where genuinely needed, underpinning.
Subsidence repair crack monitoring
Dated crack measurement records for London homes and investment properties.
Drain filling for subsidence repairs
Redundant drain runs sealed and filled beneath London properties to stop ground movement at the source.
Subsidence repair drainage surveys
CCTV drain inspections that trace whether failing pipework is behind your subsidence.
Foundation repairs for subsidence repairs
Foundation repairs for London properties, matched to the ground conditions found on site.
Helical piling for subsidence repairs
Low-vibration helical pile installation for London homes and commercial buildings.
Retaining wall repairs for subsidence repairs
Retaining wall repairs for London properties, from drainage fixes to full structural stabilisation.
Subsidence repair structural surveys
Structural surveys for London homes, giving you a clear written account of what is happening and why.
Tree root assessments for subsidence repairs
Written root assessments for London homes where trees may be shrinking the clay below.
Underpinning for subsidence repairs
Underpinning for London homes, taking foundations down to ground that carries the load without shifting.
Void filling for subsidence repairs
Void filling beneath London floors and footings, restoring ground support before the structure above is affected.
Subsidence repair wall tie repairs
Stainless steel wall tie repairs for London cavity-built homes, sorted before the outer leaf starts to move.
Get a written quote today
Send the property address, a note on what you have spotted and which service fits. A specialist will come back with a written quote before any repair work is agreed.
- Free quote on every enquiry
- No obligation to proceed
- Covering all of Greater London