Lewisham · Greater London
Concrete repairs in Lewisham
If rust stains or loose concrete have appeared on your Lewisham property, it is worth acting before pieces fall. Patch repair, crack injection and a protective coating usually restore balconies, canopies and lintels without replacing them.
Guide price from£105per m² inc VAT
- Postcodes
- BR3, SE4, SE6, SE12, SE13
- Population
- about 300,000
- Area
- Greater London
- Pricing region
- London
How do local ground conditions affect concrete repairs in Lewisham?
Lewisham is one of the 32 London boroughs, with around 300,000 residents in districts such as BR3, SE4, SE6, SE12, SE13. Neighbouring towns we cover: Southwark (3 miles), Greenwich (4 miles) and Lambeth (4 miles).
Shrinkable clay is widespread in Greater London. Ground movement here is more often linked to soils, drains and trees than to mining. Typical buildings in Greater London: Victorian and Edwardian terraces with shallow footings, inter-war semis in the outer boroughs, and converted flats and mansion blocks.
What happens when we carry out concrete repairs in Lewisham?
Photos and a description
Send photos of the damage close up and from a distance, plus the whole balcony, canopy or elevation. Tell us roughly how old the building is and whether anything has fallen, so we can judge whether to make it safe first.
Engineer where needed
If the steel has lost significant section, or the element carries a balcony, stair or wall, an independent chartered structural engineer is appointed to assess and specify. We can arrange this, and the repair follows their scope.
Break out, repair, protect
Damaged concrete is cut back to sound material, steel cleaned and primed, and the section rebuilt and cured. Cracks are injected, then the surface is coated and drainage details put right so water runs off rather than sitting.
Signs you may need concrete repairs
- Fine cracks running in straight lines along the line of the reinforcement
- Exposed steel bars showing where concrete has fallen away
- Rust-coloured stains or streaks running down the concrete surface
How much will concrete repairs cost in Lewisham?
For Lewisham we use London rates. Treat the table as a budget guide, inc VAT; the price you pay is the one on your written quote.
| Item | Guide price | Per |
|---|---|---|
| Concrete patch repair | £105 – £225 | per m² |
| Crack injection | £225 – £600 | per metre |
| Small jobs (minimum visit)est. | £560 – £1,100 | per visit |
Which repair method suits a home in Lewisham?
Patch repair
Loose and contaminated concrete is broken out behind the bar, the steel is cleaned of rust and primed, and the section is rebuilt with a repair mortar. The edges are cut square so the patch does not feather out and fail. A protective coating may be applied over the whole surface afterwards.
Best for: Localised spalling around rusting bars
Crack injection
Cracks are sealed at the surface, then a low-viscosity resin is injected under pressure through ports until it fills the crack. A rigid resin bonds the two faces back together, while a flexible one seals live cracks against water. The choice depends on whether the crack is still moving.
Best for: Cracks letting water in, or splitting a slab or beam
Rules for concrete repairs in England
Like-for-like repairs such as crack stitching and repointing do not usually need building control approval in England, but anything that changes or strengthens the structure, such as underpinning or rebuilding a wall, does. If the work touches a party wall, the Party Wall etc. Act 1996 may apply.
Concrete repairs in Lewisham: questions and answers
How much should I budget for concrete repairs in Lewisham?
Guide prices for concrete repairs in Lewisham start from about £105 per m², including VAT, on London rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.
Can you survey a property in Lewisham?
Yes. We take enquiries from across Lewisham, including BR3, SE4, SE6, SE12, and from nearby places such as Southwark and Greenwich. Send photos for a free initial view and we will tell you what happens next.
Why do houses in Greater London crack?
Most of Greater London sits on London Clay, among the most shrinkage-prone ground in the UK, with river gravels along the Thames. Subsidence claims here are among the most frequent in the country, especially after dry summers and near street and garden trees. Only an investigation can say why a particular building has moved.
Why does concrete crack and rust?
Concrete cracks as it shrinks, moves with temperature or carries more load than intended. Steel inside it rusts when carbonation or salts reach it and moisture gets in. The two feed each other: cracks let water in, and rusting steel expands and cracks the concrete further.
What is carbonation in concrete?
Carbonation is the gradual reaction between carbon dioxide in the air and concrete, which lowers its alkalinity from the surface inward. Alkaline concrete protects the steel inside, so when carbonation reaches the bars, they can start to rust. A simple test on a freshly broken surface shows how deep it has gone.
Related work in Lewisham
- Retaining wall repairs
- Bowing wall repairs
- Boundary and garden wall repairs
- Bay window subsidence repairs
- Structural crack repairs
Concrete repairs near Lewisham
Managing a block in Lewisham with tired concrete balconies? Send photos or an engineer’s schedule, and we will price the repairs balcony by balcony.