Porthcawl · Mid Glamorgan
Bay window subsidence repairs in Porthcawl
Many bays in Porthcawl were butted against the house rather than bonded into it with ties or toothed brickwork. That makes the junction the first place any differential movement shows, even when the bay foundation is reasonably sound.
Guide price from£550per bay inc VAT
- Postcodes
- CF36
- Population
- about 16,000
- Area
- Mid Glamorgan
- Pricing region
- Wales
Is Mid Glamorgan prone to ground movement?
Porthcawl is in Mid Glamorgan and takes in postcode districts CF36. About 16,000 people live there. We also take enquiries from nearby Bridgend (6 miles), Maesteg (9 miles) and Llantwit Major (10 miles).
Parts of Mid Glamorgan have clay that can shrink near trees in dry spells. Historic coal workings are recorded beneath parts of Mid Glamorgan, and a coal mining search is worth checking where movement is unexplained. Across Mid Glamorgan, most homes are long stone and brick terraces on valley sides, Victorian houses in Bridgend and post-war estates.
What to look for before calling about bay window subsidence repairs
- Bay roof or lead flashing pulling away from the main wall
- Gaps opening around the internal bay window board
- A step or slope in the bay floor towards the window
Bay window subsidence repairs prices in Porthcawl
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 |
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?
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.
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.
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.
Questions about bay window subsidence repairs in Porthcawl
How much should I budget for bay window subsidence repairs in Porthcawl?
Guide prices for bay window subsidence repairs in Porthcawl 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.
Can you survey a property in Porthcawl?
We do. Porthcawl and the surrounding area are covered, including nearby Bridgend and Maesteg. A free initial assessment from your photos is the first step.
Why do houses in Mid Glamorgan crack?
Mid Glamorgan lies on the South Wales coalfield, with dense historic workings, spoil tips and steep valley sides. Landslip, retaining walls and mining legacy are all live issues in the valleys. 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.
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.
Related work in Porthcawl
- Subsidence insurance claim repairs
- Structural surveys and crack monitoring
- Boundary and garden wall repairs
- Underpinning
- Lintel replacement
Bay window subsidence repairs near Porthcawl
For a no-obligation written quote on bay window subsidence in Porthcawl, call or send a few photos with a tape measure in shot.