Cambridge · Cambridgeshire
Concrete repairs in Cambridge
Spalling concrete on a Cambridge balcony, canopy or lintel almost always starts with the steel inside. Once carbonation or salts reach the bars, they rust and swell, and the concrete breaks away along their line until the steel is repaired and protected.
Guide price from£90per m² inc VAT
- Postcodes
- CB2, CB4
- Population
- about 150,000
- Area
- Cambridgeshire
- Pricing region
- East of England
What should you know about the ground under Cambridge?
Cambridge (CB2, CB4) has around 150,000 residents and sits in Cambridgeshire. If you are just outside Cambridge, we also cover Royston (12 miles), St Ives (12 miles) and Newmarket (13 miles).
Shrinkable clay is widespread in Cambridgeshire. Ground movement here is more often linked to soils, drains and trees than to mining. Typical buildings in Cambridgeshire: Victorian terraces in Cambridge and Peterborough, fen-edge cottages, and extensive post-war and new-build estates.
Is it time for concrete repairs? Common signs
- Rust-coloured stains or streaks running down the concrete surface
- Chunks or flakes of concrete breaking away from edges and soffits
- Hollow sound when the surface is tapped with a hammer
What should you budget for concrete repairs in Cambridge?
Prices in Cambridge are worked out on East of England rates. They include VAT and are a starting point: access, the extent of the damage and whether an engineer or building control is involved all move the figure.
| Item | Guide price | Per |
|---|---|---|
| Concrete patch repair | £90 – £190 | per m² |
| Crack injection | £190 – £505 | per metre |
| Small jobs (minimum visit)est. | £470 – £945 | per visit |
Repair options we may recommend
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
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
What to expect when we carry out concrete repairs
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.
Written quote
You receive a no-obligation written quote setting out the estimated area of patching, the length of crack injection, coatings and access. It becomes a fixed price in writing once the repair is specified, with any re-measure terms stated clearly.
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.
Your concrete repairs questions
How much will concrete repairs cost in Cambridge?
Guide prices for concrete repairs in Cambridge start from about £90 per m², including VAT, on East of England rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.
Do you cover Cambridge?
Yes, Cambridge is covered, along with postcode districts CB2, CB4. We also cover nearby Royston and St Ives.
Is the ground in Cambridgeshire prone to subsidence?
Gault Clay underlies much of the Cambridge area and Oxford Clay the west of the county around Peterborough and Huntingdon, while the northern fens are peat and silt that can shrink as they dry. Both clay and peat ground can move with the seasons. 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.
Can a concrete balcony be repaired rather than replaced?
In most cases, yes. Patch repairs, crack injection, a new waterproof deck and restored drips usually extend a balcony’s life considerably. Replacement is generally only needed where the steel has lost a lot of section or the balcony’s fixing to the building is compromised.
Other structural repairs in Cambridge
- Bay window subsidence repairs
- Subsidence insurance claim repairs
- Resin injection ground stabilisation
- Chimney stack repairs
- Brick arch repairs
Concrete repairs near Cambridge
The written quote for concrete repairs in Cambridge sets out the estimated areas and lengths, then becomes a fixed price in writing once the repair is specified.