Colwyn Bay · Clwyd
Bay window subsidence repairs in Colwyn Bay
Bay windows are a feature of many older streets in Colwyn Bay, and so is the crack where a bay meets the front wall. Often it reflects a shallower bay footing reacting to the ground, rather than a problem with the whole house.
Guide price from£550per bay inc VAT
- Postcodes
- LL28, LL29
- Population
- about 29,000
- Area
- Clwyd
- Pricing region
- Wales
Is Clwyd prone to ground movement?
Colwyn Bay, Clwyd: about 29,000 residents across postcode districts LL28, LL29. Nearby places we cover include Llandudno (5 miles), Abergele (6 miles) and Rhyl (10 miles).
Clay soils are found in parts of Clwyd. Parts of Clwyd lie on a former coalfield, so a coal mining search is worth checking if movement has no obvious cause. Housing stock in Clwyd: Brick colliery terraces, seaside villas in Rhyl and Colwyn Bay, and post-war estates.
Is it time for bay window subsidence repairs? Common signs
- Bay window sash or casement sticking or binding
- Bay roof or lead flashing pulling away from the main wall
- Gaps opening around the internal bay window board
What should you budget for bay window subsidence repairs in Colwyn Bay?
The ranges below reflect typical Wales costs for bay window subsidence repairs, including VAT. Scaffold, access and making good can push a job to the top of the range.
| Item | Guide price | Per |
|---|---|---|
| Bay junction crack repair and tie-inest. | £550 – £1,650 | per bay |
| Traditional underpinning of a bay | £2,750 – £6,450 | per bay |
| Mini-piled bay underpinning | £4,600 – £11,000 | per bay |
Repair options we may recommend
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
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
What to expect when we carry out bay window subsidence repairs
Photos and first view
Send photos of the outside junction, the inside corners and the window, with a scale. We give a free initial assessment and tell you whether the crack looks old and stable or whether an engineer should inspect first.
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.
Carry out the work
Ties are fitted across the junction, or the bay is underpinned in sequence with building control inspecting the dig. The bay window and flashings are checked and eased or resealed where the movement has disturbed them.
Rules for bay window subsidence repairs in Wales
In Wales, the Welsh version of the Building Regulations applies. Underpinning and other work that alters or strengthens the structure needs building control approval and inspection; like-for-like repairs often do not. The Party Wall etc. Act 1996 applies to work on party walls and excavation close to a neighbour’s foundations.
Your bay window subsidence repairs questions
How much will bay window subsidence repairs cost in Colwyn Bay?
Guide prices for bay window subsidence repairs in Colwyn Bay start from about £550 per bay, including VAT, on Wales rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.
Do you cover Colwyn Bay?
Yes, Colwyn Bay is covered, along with postcode districts LL28, LL29. We also cover nearby Llandudno and Abergele.
Is the ground in Clwyd prone to subsidence?
The North Wales coalfield runs beneath parts of Wrexham and Flintshire, where historic workings are recorded, while the coast and vale have glacial clays and the hills are older hard rock. Only an investigation can say why a particular building has moved.
Can a bay be underpinned without underpinning the house?
Yes, underpinning only the bay is common because it is usually the part on shallower footings. The engineer designs the junction so the strengthened bay and the existing house can move slightly without cracking, sometimes with a movement joint or ties.
Can I just fill the crack myself?
Filling it hides the evidence without dealing with the cause, and if the bay is still moving the crack will reopen. Photograph it with a scale and date first. If you plan to claim on insurance, tell your insurer before any repair, including filling.
Other structural repairs in Colwyn Bay
- Structural crack repairs
- Retaining wall repairs
- Subsidence repairs
- Structural surveys and crack monitoring
- Gable end wall repairs
Bay window subsidence repairs near Colwyn Bay
Not sure whether your Colwyn Bay bay is still moving? Send dated photos, and we will suggest whether monitoring or a repair comes next.