Derry · County Londonderry
Concrete repairs in Derry
A crumbling balcony edge at a Derry 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£75per m² inc VAT
- Postcodes
- BT48
- Population
- about 84,000
- Area
- County Londonderry
- Pricing region
- Northern Ireland
Is County Londonderry prone to ground movement?
Postcode districts BT48 cover Derry, a County Londonderry town of about 84,000 people. If you are just outside Derry, we also cover Strabane (14 miles) and Limavady (15 miles).
Shrinkable clay is less common in County Londonderry than in south-east England. Ground movement here is more often linked to soils, drains and trees than to mining. Across County Londonderry, most homes are Georgian and Victorian houses in Derry, brick terraces and post-war estates.
How much will concrete repairs cost in Derry?
These are guide prices for Derry, using Northern Ireland rates and including VAT. Your written quote follows photos or a survey, and is fixed once the repair is specified.
| Item | Guide price | Per |
|---|---|---|
| Concrete patch repair | £75 – £160 | per m² |
| Crack injection | £160 – £420 | per metre |
| Small jobs (minimum visit)est. | £395 – £790 | per visit |
Which repair method suits a home in Derry?
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
Protective coatings and sealing
After repair, an anti-carbonation coating, a waterproof deck membrane on a balcony, or a penetrating sealer slows the return of moisture and carbon dioxide. Restoring drips, upstands and falls so water drains away is as important as the coating itself.
Best for: Extending the life of repaired balconies and canopies
What happens when we carry out concrete repairs in Derry?
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.
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
- Hollow sound when the surface is tapped with a hammer
- Rust-coloured stains or streaks running down the concrete surface
Rules for concrete repairs in Northern Ireland
In Northern Ireland, minor repairs usually need no approval, but structural work comes under the Building Regulations (Northern Ireland) 2012 and council building control. There is no Party Wall Act in Northern Ireland.
Concrete repairs in Derry: questions and answers
What is the price of concrete repairs in Derry?
Guide prices for concrete repairs in Derry start from about £75 per m², including VAT, on Northern Ireland 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 Derry?
We do. Derry and the surrounding area are covered, including nearby Strabane and Limavady. A free initial assessment from your photos is the first step.
Does the ground around Derry cause cracking?
County Londonderry has basalt, older hard rock and glacial deposits, with soft river ground along the Foyle and Bann. Only an investigation can say why a particular building has moved.
Can you repair a cracked concrete lintel?
Often, yes. Spalling and small cracks in a concrete lintel can be patch repaired and the steel treated. If the lintel is badly cracked, sagging or the bars have lost much of their section, replacement is usually better, and the opening is propped while it is done.
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.
More repairs we carry out in Derry
- Extension pulling away repairs
- Bay window subsidence repairs
- Brick arch repairs
- Underpinning
- Chimney stack repairs
Concrete repairs near Derry
The written quote for concrete repairs in Derry sets out the estimated areas and lengths, then becomes a fixed price in writing once the repair is specified.