Bangor · County Down
Bay window subsidence repairs in Bangor
A cracked bay in Bangor can be anything from an old, stable joint to a foundation that is still dropping. Photos of the outside junction and the inside corners usually show which is more likely and whether an engineer should look.
Guide price from£530per bay inc VAT
- Postcodes
- BT19, BT20
- Population
- about 61,000
- Area
- County Down
- Pricing region
- Northern Ireland
What should you know about the ground under Bangor?
With roughly 61,000 people, Bangor spans postcode districts BT19, BT20 in County Down. We also take enquiries from nearby Newtownards (5 miles), Holywood (6 miles) and Downpatrick (23 miles).
Clay shrinkage is less of a concern in County Down, so other causes such as drains, poor footings or older walls are checked first. Ground movement here is more often linked to soils, drains and trees than to mining. What you mostly find across County Down: Victorian seaside houses in Bangor and Holywood, brick terraces and post-war estates.
How we usually approach bay window subsidence repairs
Traditional underpinning of the bay
The bay footing is excavated in short sections and new mass concrete is placed down to firmer ground below the zone affected by roots and seasons. Because a bay is a short length of wall, the work is compact, but it needs building control approval.
Best for: Active bay movement on firm ground at moderate depth
Junction crack repair and tie-in
Where movement has stopped, the open joint between bay and house is raked out, stainless ties or helical bars are fixed across it, and the joint is repointed to match. Internal plaster along the crack is cut back and renewed before redecoration.
Best for: Old, stable cracks where the bay is no longer moving
What happens during bay window subsidence repairs, step by step?
Engineer and checks
Where the cause is unclear, an independent chartered structural engineer inspects, sometimes with a trial pit at the bay and a drain survey. We can arrange the engineer. Monitoring may be suggested if the movement could be seasonal.
Agree the repair
The engineer decides between tie-in repairs and underpinning. We confirm a fixed price in writing once the repair is specified, including scaffolding if needed, the bay window, roof flashing and internal making good.
Make good inside
Plaster around the bay and along the junction is renewed, the window board is refixed and the room is ready for decoration. Building control paperwork, where it applies, is passed to you for your records.
What to look for before calling about bay window subsidence repairs
- A step or slope in the bay floor towards the window
- Bay roof or lead flashing pulling away from the main wall
- A vertical crack where the bay meets the front wall
Bay window subsidence 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 |
|---|---|---|
| Bay junction crack repair and tie-inest. | £530 – £1,600 | per bay |
| Traditional underpinning of a bay | £2,650 – £6,150 | per bay |
| Mini-piled bay underpinning | £4,400 – £10,600 | per bay |
Rules for bay window subsidence 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 bay window subsidence repairs in Bangor
What is the price of bay window subsidence repairs in Bangor?
Guide prices for bay window subsidence repairs in Bangor start from about £530 per bay, 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 bay window subsidence repairs in Bangor?
Yes, Bangor is covered, along with postcode districts BT19, BT20. We also cover nearby Newtownards and Holywood.
Does the ground around Bangor cause cracking?
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.
Is a crack between my bay and the house serious?
It is often not serious, especially if it is old, fine and unchanged for years. A crack that is widening, tapering or matched by sticking windows and a sloping bay floor needs looking at. An engineer’s inspection, sometimes with monitoring, will confirm whether the bay is still moving.
How long does bay underpinning take?
Traditional underpinning of a bay usually takes about a week on site, and mini-piling a little longer depending on depth. A junction tie-in without underpinning normally takes one to two days. Approvals and any monitoring beforehand add to the overall timeline.
More repairs we carry out in Bangor
- Crack stitching
- Lintel replacement
- Subsidence repairs
- Subsidence insurance claim repairs
- Retaining wall repairs
Bay window subsidence repairs near Bangor
Not sure whether your Bangor bay is still moving? Send dated photos, and we will suggest whether monitoring or a repair comes next.