Subsidence repair drainage surveys in Greater London
CCTV drain inspections that trace whether failing pipework is behind your subsidence.
What Subsidence repair drainage surveys involves and when it applies
Drainage surveys for Greater London properties, using CCTV inspection to identify leaks, collapses and root intrusion that may be driving ground movement.
A fractured or leaking drain under a building can set off ground movement that affects the foundations above. If a pipe breaks, water disperses into the surrounding soil, carrying fine particles with it and potentially forming voids directly under a footing. During a drainage survey, CCTV cameras travel through the drain runs, recording root ingress, open joints, collapsed sections and any location where water is leaving the pipe.
Greater London has a large stock of Victorian and Edwardian clay drains that have been patched, extended and re-routed over many decades. A specialist maps the drain layout against the visible crack patterns in the structure above, producing a written report with camera footage and findings. Catching a drain fault before it progresses can lower the likelihood of more involved foundation repairs being required down the line. A free quote is available on request.
Does your property show these signs?
Cracks appeared around the same time a blocked or broken drain was discovered close to the property
Ground near a known drain run stays soft or wet even during dry weather
A CCTV inspection has not been carried out and the cause of ground movement remains unclear
Settlement follows a line across the garden or floor that matches the route of a buried drain
Surface repairs to cracks have not held and no drainage check has been done below
Rainwater is pooling against the base of the wall rather than clearing away from the building
Steps a specialist follows for Subsidence repair drainage surveys
Access and flush
The specialist opens the nearest inspection chamber and clears any loose debris so the camera can pass.
Camera run
A small camera is pushed along the pipe while the specialist watches for cracks, displaced joints, roots and sags.
Defect grading
Each fault is marked on a plan of the drain and ranked by how likely it is to leak into the soil near your foundations.
Findings and options
You receive the footage and a written note covering what was found and which repairs would deal with it.
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
- Camera run along the drain with the footage saved
- Sketch of the drain route and where it sits near the house
- List of cracks, joint slips and roots found
- Repair options set out in order of urgency
The camera survey itself is typically completed in a single visit of one to two hours. Where drain repairs follow, most jobs run one to three days on site, though work involving excavation under a concrete slab or at significant depth usually takes longer.
What affects the scope of a drainage survey
CCTV findings and where they direct excavation
A camera passed through the drain identifies the precise location of any fracture, root ingress or displaced joint. The footage pinpoints the exact position of any fracture, root intrusion or displaced joint, so excavation is confined to that spot rather than a wide estimated area, limiting disturbance to paths, drives and planted borders across Greater London properties.
Pipe material and likely failure mode
Clay pipes become prone to root ingress and joint separation with age. Concrete pipes can crack under ground movement. Plastic pipes tend to fail at joints where installation was poor. The specialist takes pipe material into account when working out how a failure has occurred and which repair approach suits the situation.
Depth and access to the drain
Pipe runs close to the surface beneath a path are relatively quick to expose and make good. Where a drain passes under a concrete slab or sits at significant depth, access takes longer, and the work programme is set accordingly once the camera survey has located the fault.
Relining as an alternative to digging
If the pipe wall is intact but joints have parted or the internal bore has reduced, a resin liner inserted from inside can recover flow capacity while leaving the surface undisturbed. The specialist assesses the pipe condition and advises whether relining is viable or whether excavation is required.
Subsidence repair drainage surveys across Greater London
Specialists take on subsidence repair drainage surveys 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.
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.
Subsidence repair resin injection
Resin injection for London properties where voids beneath a footing need filling without major excavation.
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