Antrim · County Antrim
Extension pulling away repairs in Antrim
Rear and side extensions are common across Antrim, and so is the crack where new meets old. Usually it reflects the two parts sitting on different foundations, and the first question is whether the gap is still opening.
Guide price from£530per junction inc VAT
- Postcodes
- BT41
- Population
- about 20,000
- Area
- County Antrim
- Pricing region
- Northern Ireland
Why does the ground in County Antrim matter for extension pulling away repairs?
Antrim is in County Antrim and takes in postcode districts BT41. About 20,000 people live there. Nearby, we also cover Ballymena (10 miles), Newtownabbey (13 miles) and Belfast (14 miles).
Most of County Antrim is on firmer ground than the clay belts of the south-east. Historic brine and salt working has caused ground movement in parts of County Antrim in the past. What you mostly find across County Antrim: red-brick terraces in Belfast, Victorian villas, and post-war and newer estates.
Repair options we may recommend
Junction crack repair with stainless ties
The open joint is cut out, stainless ties or helical bars are fixed across it into both the old and new masonry, and the joint is repointed or rendered to match. Inside, the corner is replastered. This suits extensions that moved once and have since stopped.
Best for: Settled extensions with a stable gap at the junction
Underpinning the extension
If the extension is still dropping because its footings are too shallow or on poor ground, they are taken deeper by mass concrete, beam-and-base or mini-piles. The engineer designs the scheme, and the junction is repaired once the new foundation is in.
Best for: Active movement from shallow footings, roots or soft ground
What to expect when we carry out extension pulling away repairs
Show us the junction
Send photos of the crack outside, the internal corner and any flashing above, with a measure for scale. We give a free initial assessment and an initial view on whether the gap is likely old or still opening.
Find what is moving
An independent chartered structural engineer can inspect, and we can arrange one. A drain survey under the extension, a trial pit at its footing and tell-tale monitoring across the joint are common checks before choosing the repair.
Finish and hand over
Internal corners are replastered, skirtings and coving refixed, and doors or windows in the extension eased where the movement affected them. Records of the repair and any approvals are passed to you.
Is it time for extension pulling away repairs? Common signs
- Patio doors or windows in the extension starting to bind
- A vertical crack or gap where the extension meets the house
- Extension roof flashing lifting off the original wall
What should you budget for extension pulling away repairs in Antrim?
Prices in Antrim are worked out on Northern Ireland 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 |
|---|---|---|
| Junction crack repair with stainless tiesest. | £530 – £1,750 | per junction |
| Movement joint and making goodest. | £350 – £1,050 | per junction |
| Underpinning the extension where needed | £880 – £2,200 | per metre of wall |
Rules for extension pulling away repairs in Northern Ireland
In Northern Ireland, the Building Regulations (Northern Ireland) 2012 apply and the council’s building control service approves structural work such as underpinning; minor like-for-like repairs usually need no approval. The Party Wall Act does not apply in Northern Ireland, so work to shared walls depends on deeds and agreement with neighbours.
Your extension pulling away repairs questions
How much will extension pulling away repairs cost in Antrim?
Guide prices for extension pulling away repairs in Antrim start from about £530 per junction, 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 cover Antrim?
Yes, Antrim is covered, along with postcode districts BT41. We also cover nearby Ballymena and Newtownabbey.
Is the ground in County Antrim prone to subsidence?
County Antrim is largely basalt over chalk, with soft estuarine 'sleech' along Belfast Lough that is notorious for settlement. Historic salt mining is recorded near Carrickfergus. Only an investigation can say why a particular building has moved.
Is it normal for an extension to crack at the join?
A fine crack at the junction is fairly common, especially in the first few years as a new extension settles. It becomes a concern when the gap is widening, tapering, letting in water or matched by sticking doors and sloping floors. Those signs point to continuing movement.
Can I just fill the gap with mastic?
Mastic can keep water out short term, but it does not stop movement or reconnect the walls. If the gap reopens after filling, something is still moving. Photograph and measure it over a few months first, so an engineer can see the trend.
Other structural repairs in Antrim
- Structural surveys and crack monitoring
- Subsidence insurance claim repairs
- Gable end wall repairs
- Structural crack repairs
- Bay window subsidence repairs
Extension pulling away repairs near Antrim
Send photos of the extension junction at your Antrim home, inside and out, and we will give a free initial assessment and a guide price.