Bangor · County Down
Extension pulling away repairs in Bangor
If the corner joint in your Bangor extension keeps splitting after you fill it, something is still moving. Measuring the gap over a few months, with dated photos, gives an engineer the evidence to recommend the right repair.
Guide price from£530per junction inc VAT
- Postcodes
- BT19, BT20
- Population
- about 61,000
- Area
- County Down
- Pricing region
- Northern Ireland
Is County Down prone to ground movement?
Bangor, County Down: about 61,000 residents across postcode districts BT19, BT20. Nearby places we cover include Newtownards (5 miles), Holywood (6 miles) and Downpatrick (23 miles).
Most of County Down is on firmer ground than the clay belts of the south-east. Ground movement here is more often linked to soils, drains and trees than to mining. Typical buildings in County Down: Victorian seaside houses in Bangor and Holywood, brick terraces and post-war estates.
How we usually approach extension pulling away repairs
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
Movement joint and making good
Where some seasonal movement is expected to continue, the junction is formed into a proper flexible movement joint with a compressible filler and sealant, so the two parts can move without cracking. Flashings and internal finishes are detailed to suit.
Best for: Minor ongoing movement that does not threaten the structure
What happens during extension pulling away repairs, step by step?
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.
Choose the fix
The engineer decides between ties, a movement joint or underpinning. We confirm a fixed price in writing once the repair is specified, covering the junction, flashings, internal finishes and any foundation work.
Repair the junction
Drains are repaired first if they are leaking. The joint is then tied, formed as a movement joint or rebuilt after underpinning, with roof flashings reset so the junction stays watertight. Building control is handled where needed.
What to look for before calling about extension pulling away repairs
- Daylight or draughts showing through the internal corner joint
- Patio doors or windows in the extension starting to bind
- Mastic or render at the joint repeatedly splitting open
Extension pulling away repairs prices in Bangor
These are guide prices for Bangor, 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 |
|---|---|---|
| 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.
Questions about extension pulling away repairs in Bangor
How much will extension pulling away repairs cost in Bangor?
Guide prices for extension pulling away repairs in Bangor 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 Bangor?
Yes. We take enquiries from across Bangor, including BT19, BT20, and from nearby places such as Newtownards and Holywood. Send photos for a free initial view and we will tell you what happens next.
Is the ground in County Down prone to subsidence?
County Down is mostly drumlin till over older rock and granite in the Mournes, with soft estuarine ground around Belfast Lough and Strangford. Only an investigation can say why a particular building has moved.
Why is my extension pulling away from my house?
Usually because the extension and the house sit on different foundations that react differently to the ground. Shallow extension footings, leaking drains under the extension, nearby roots and weak tie-ins between old and new walls are the common causes.
Can a drain under my extension cause it to move?
Yes, a cracked or displaced drain beneath or beside an extension can soften clay or wash away fine soil. A CCTV drain survey usually finds it. Repairing the drain is often the first and most important step before any repair to the walls.
Other structural repairs in Bangor
- Chimney stack repairs
- Crack stitching
- Lintel replacement
- Bay window subsidence repairs
- Subsidence insurance claim repairs
Extension pulling away repairs near Bangor
Call about the cracked extension junction at your Bangor property; a free initial assessment first, then a fixed written price once the repair is specified.