Oldham · Greater Manchester
Bay window subsidence repairs in Oldham
If your Oldham bay window has started sticking and a gap has opened at the junction, it is worth finding out whether the bay is still moving. A stable crack needs a straightforward tie-in, whereas an active one may need a new foundation.
Guide price from£575per bay inc VAT
- Postcodes
- OL1, OL8, OL9
- Population
- about 240,000
- Area
- Greater Manchester
- Pricing region
- North West
Is Greater Manchester prone to ground movement?
With roughly 240,000 people, Oldham spans postcode districts OL1, OL8, OL9 in Greater Manchester. Nearby places we cover include Middleton (3 miles), Ashton-under-Lyne (4 miles) and Rochdale (6 miles).
Clay soils are found in parts of Greater Manchester. Parts of Greater Manchester lie on a former coalfield, so a coal mining search is worth checking if movement has no obvious cause. Housing stock in Greater Manchester: Red-brick terraces, mill-town stone terraces, inter-war semis and post-war estates.
Guide prices for bay window subsidence repairs in Oldham
Guide prices below are for homes in Oldham, on North West rates and including VAT. A survey or good photos let us turn them into a fixed written price.
| Item | Guide price | Per |
|---|---|---|
| Bay junction crack repair and tie-inest. | £575 – £1,750 | per bay |
| Traditional underpinning of a bay | £2,900 – £6,700 | per bay |
| Mini-piled bay underpinning | £4,800 – £11,500 | per bay |
Methods for bay window subsidence repairs
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
From first photo to finished repair
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.
Symptoms that point to bay window subsidence repairs
- Bay window sash or casement sticking or binding
- A step or slope in the bay floor towards the window
- Bay roof or lead flashing pulling away from the main wall
Rules for bay window subsidence repairs in England
In England, underpinning and other work that alters or strengthens a wall or foundation is building work under the Building Regulations (Part A, structure), so building control approves and inspects it. Like-for-like repairs often are not, and we tell you which applies before a price is agreed. Work to a party wall, or excavation close to a neighbour’s foundations, can also need a notice under the Party Wall etc. Act 1996.
Frequently asked questions
How much will bay window subsidence repairs cost in Oldham?
Guide prices for bay window subsidence repairs in Oldham start from about £575 per bay, including VAT, on North West rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.
Do you cover Oldham?
Yes. We take enquiries from across Oldham, including OL1, OL8, OL9, and from nearby places such as Middleton and Ashton-under-Lyne. Send photos for a free initial view and we will tell you what happens next.
Is the ground in Greater Manchester prone to subsidence?
Greater Manchester is mostly glacial till over sandstone and mudstone, with the Lancashire coalfield beneath much of Wigan, Bolton, Salford and parts of the east. Historic mine workings, made ground and old mill sites are common. Only an investigation can say why a particular building has moved.
Why do bay windows crack away from the house?
Bays often stand on shallower footings than the main walls, so they react to drying clay, roots and drain leaks that the deeper house foundations escape. Many bays were also never properly tied in, so any movement opens a clean vertical crack at the junction.
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 Oldham
Bay window subsidence repairs near Oldham
Send photos of the bay junction inside and out at your Oldham home for a free initial assessment and a guide price.