Barnet · Greater London
Concrete repairs in Barnet
A crumbling balcony edge at a Barnet property is rarely just cosmetic. It is usually a sign of rusting steel inside, and the sooner it is repaired, the less concrete has to be broken out and rebuilt.
Guide price from£105per m² inc VAT
- Postcodes
- EN4, EN5, N3, N12, N20
- Population
- about 390,000
- Area
- Greater London
- Pricing region
- London
Why does the ground in Greater London matter for concrete repairs?
Barnet is one of the 32 London boroughs, with around 390,000 residents in districts such as EN4, EN5, N3, N12, N20. We also take enquiries from nearby Haringey (4 miles), Borehamwood (4 miles) and Potters Bar (5 miles).
Shrinkable clay is widespread in Greater London. Ground movement here is more often linked to soils, drains and trees than to mining. What you mostly find across Greater London: Victorian and Edwardian terraces with shallow footings, inter-war semis in the outer boroughs, and converted flats and mansion blocks.
Signs you may need concrete repairs
- Hollow sound when the surface is tapped with a hammer
- Chunks or flakes of concrete breaking away from edges and soffits
- Damp patches, white deposits or drips on a balcony or canopy underside
How much will concrete repairs cost in Barnet?
For Barnet 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 Barnet?
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
Recasting or strengthening
Where steel has lost much of its section, or a lintel or canopy is too far gone to patch, the element is propped and rebuilt, replaced or strengthened to an engineer’s design. It is less common, but sometimes the more lasting option for small canopies and old precast lintels.
Best for: Badly corroded lintels, canopies and balcony edges
What happens when we carry out concrete repairs in Barnet?
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.
Survey and tapping test
On site we tap the surface to find hollow areas, check the steel where it is exposed and note drainage. Where the extent is unclear, a cover meter, carbonation test or chloride test may be advised before repair.
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.
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 Barnet: questions and answers
What is the price of concrete repairs in Barnet?
Guide prices for concrete repairs in Barnet 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.
Do you carry out concrete repairs in Barnet?
Yes. We take enquiries from across Barnet, including EN4, EN5, N3, N12, and from nearby places such as Haringey and Borehamwood. Send photos for a free initial view and we will tell you what happens next.
Does the ground around Barnet cause cracking?
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.
What is spalling concrete?
Spalling is concrete breaking away from the surface in flakes or chunks. In reinforced concrete it is usually caused by the steel inside rusting and expanding, which pushes the cover off. It often follows a straight line where a bar sits close to the surface, with rust staining nearby.
Is spalling concrete dangerous?
It can be, mainly because pieces may fall from balconies, canopies and soffits above doors or paths. It also means the steel is losing strength over time. Fence off the area below any loose concrete, keep people off a balcony that is badly affected, and have it assessed soon.
More repairs we carry out in Barnet
- Subsidence repairs
- Underpinning
- Extension pulling away repairs
- Lintel replacement
- Subsidence insurance claim repairs
Concrete repairs near Barnet
Get a free initial assessment of cracked or spalling concrete in Barnet from your photos or a call, including whether an engineer should look first.