Cheltenham · Gloucestershire
Extension pulling away repairs in Cheltenham
If the corner joint in your Cheltenham 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£620per junction inc VAT
- Postcodes
- GL50, GL51, GL53
- Population
- about 120,000
- Area
- Gloucestershire
- Pricing region
- South West
Is Gloucestershire prone to ground movement?
Cheltenham (GL50, GL51, GL53) has around 120,000 residents and sits in Gloucestershire. Neighbouring towns we cover: Tewkesbury (7 miles), Gloucester (7 miles) and Stroud (12 miles).
Parts of Gloucestershire have clay that can shrink near trees in dry spells. Parts of Gloucestershire lie on a former coalfield, so a coal mining search is worth checking if movement has no obvious cause. Housing stock in Gloucestershire: Cotswold stone cottages, Regency terraces in Cheltenham, and brick estates around Gloucester.
Symptoms that point to extension pulling away repairs
- Patio doors or windows in the extension starting to bind
- Daylight or draughts showing through the internal corner joint
- Mastic or render at the joint repeatedly splitting open
Guide prices for extension pulling away repairs in Cheltenham
Prices in Cheltenham are worked out on South West rates. They include VAT and are a starting point: access, the extent of the damage and whether an engineer or building control is involved all move the figure.
| Item | Guide price | Per |
|---|---|---|
| Junction crack repair with stainless tiesest. | £620 – £2,050 | per junction |
| Movement joint and making goodest. | £410 – £1,250 | per junction |
| Underpinning the extension where needed | £1,050 – £2,600 | per metre of wall |
Methods for extension pulling away repairs
Underpinning the extension
If the extension is still dropping because its footings are too shallow or on poor ground, they are taken deeper by mass concrete, beam-and-base or mini-piles. The engineer designs the scheme, and the junction is repaired once the new foundation is in.
Best for: Active movement from shallow footings, roots or soft ground
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
From first photo to finished repair
Show us the junction
Send photos of the crack outside, the internal corner and any flashing above, with a measure for scale. We give a free initial assessment and an initial view on whether the gap is likely old or still opening.
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.
Rules for extension pulling away 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 extension pulling away repairs cost in Cheltenham?
Guide prices for extension pulling away repairs in Cheltenham start from about £620 per junction, including VAT, on South West rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.
Do you cover Cheltenham?
We do. Cheltenham and the surrounding area are covered, including nearby Tewkesbury and Gloucester. A free initial assessment from your photos is the first step.
Is the ground in Gloucestershire prone to subsidence?
The Severn vale around Gloucester, Cheltenham and Tewkesbury is Lias and Mercia Mudstone clay, the Cotswolds are limestone, and the Forest of Dean has a historic coalfield. Parts of South Gloucestershire around Kingswood also lie on old Coal Measures. Only an investigation can say why a particular building has moved.
What is a movement joint?
A movement joint is a deliberate, flexible break in a wall that lets two parts of a building move slightly without cracking. It is filled with a compressible material and sealed. At an extension junction it can replace a rigid joint that keeps cracking.
Can I just fill the gap with mastic?
Mastic can keep water out short term, but it does not stop movement or reconnect the walls. If the gap reopens after filling, something is still moving. Photograph and measure it over a few months first, so an engineer can see the trend.
Other structural repairs in Cheltenham
- Bowing wall repairs
- Boundary and garden wall repairs
- Roof structure repairs
- Structural surveys and crack monitoring
- Retaining wall repairs
Extension pulling away repairs near Cheltenham
If the junction at your Cheltenham property keeps reopening, send dated photos and we will suggest whether monitoring, a drain survey or a repair comes next.