St Albans · Hertfordshire
Concrete repairs in St Albans
Spalling concrete on a St Albans 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
- AL1, AL2
- Population
- about 85,000
- Area
- Hertfordshire
- Pricing region
- East of England
What should you know about the ground under St Albans?
We cover St Albans and its postcode districts AL1, AL2, part of Hertfordshire, with a population of roughly 85,000. Nearby, we also cover Harpenden (5 miles), Hatfield (5 miles) and Hemel Hempstead (5 miles).
Shrinkable clay is widespread in Hertfordshire. Ground movement here is more often linked to soils, drains and trees than to mining. Typical buildings in Hertfordshire: Garden-city houses in Letchworth and Welwyn, 1930s semis, Victorian terraces and post-war new-town estates.
Which repair method suits a home in St Albans?
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
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
What happens when we carry out concrete repairs in St Albans?
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.
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.
Signs you may need concrete repairs
- Chunks or flakes of concrete breaking away from edges and soffits
- Fine cracks running in straight lines along the line of the reinforcement
- Exposed steel bars showing where concrete has fallen away
How much will concrete repairs cost in St Albans?
For St Albans we use East of England 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 | £90 – £190 | per m² |
| Crack injection | £190 – £505 | per metre |
| Small jobs (minimum visit)est. | £470 – £945 | per visit |
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 St Albans: questions and answers
How much will concrete repairs cost in St Albans?
Guide prices for concrete repairs in St Albans 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 St Albans?
Yes. We take enquiries from across St Albans, including AL1, AL2, and from nearby places such as Harpenden and Hatfield. Send photos for a free initial view and we will tell you what happens next.
Is the ground in Hertfordshire prone to subsidence?
South Hertfordshire around Watford, Borehamwood and Potters Bar is London Clay, while the north and west are chalk with clay-with-flints and the east has boulder clay. The clay areas are prone to seasonal subsidence near trees. Only an investigation can say why a particular building has moved.
Do you repair concrete on blocks of flats?
Yes, we repair concrete on houses, flats and small commercial buildings, including balconies, walkway edges, canopies and lintels. For flats, the freeholder, managing agent or owners’ association normally instructs the work. We can price to an engineer’s schedule where one has been prepared.
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.
Other structural repairs in St Albans
- Subsidence repairs
- Subsidence insurance claim repairs
- Structural crack repairs
- Gable end wall repairs
- Resin injection ground stabilisation
Concrete repairs near St Albans
The written quote for concrete repairs in St Albans sets out the estimated areas and lengths, then becomes a fixed price in writing once the repair is specified.