Rhondda · Mid Glamorgan
Extension pulling away repairs in Rhondda
An extension pulling away from a Rhondda house is often a drain problem, a shallow footing or a missing tie-in, rather than a failing building. Finding out which applies decides whether the fix is a junction repair or new foundations.
Guide price from£550per junction inc VAT
- Postcodes
- CF40, CF41, CF43
- Population
- about 70,000
- Area
- Mid Glamorgan
- Pricing region
- Wales
What should you know about the ground under Rhondda?
With roughly 70,000 people, Rhondda spans postcode districts CF40, CF41, CF43 in Mid Glamorgan. If you are just outside Rhondda, we also cover Tonypandy (3 miles), Mountain Ash (3 miles) and Aberdare (4 miles).
Mid Glamorgan has a mix of ground, with clay in some places and firmer rock in others. Historic coal workings are recorded beneath parts of Mid Glamorgan, and a coal mining search is worth checking where movement is unexplained. Typical buildings in Mid Glamorgan: Long stone and brick terraces on valley sides, Victorian houses in Bridgend and post-war estates.
What to look for before calling about extension pulling away repairs
- Mastic or render at the joint repeatedly splitting open
- Floor level dropping where the extension and house floors meet
- Patio doors or windows in the extension starting to bind
Extension pulling away repairs prices in Rhondda
These are guide prices for Rhondda, using Wales rates and including VAT. Your written quote follows photos or a survey, and is fixed once the repair is specified.
| Item | Guide price | Per |
|---|---|---|
| Junction crack repair with stainless tiesest. | £550 – £1,850 | per junction |
| Movement joint and making goodest. | £370 – £1,100 | per junction |
| Underpinning the extension where needed | £920 – £2,300 | per metre of wall |
How we usually approach extension pulling away repairs
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
Junction crack repair with stainless ties
The open joint is cut out, stainless ties or helical bars are fixed across it into both the old and new masonry, and the joint is repointed or rendered to match. Inside, the corner is replastered. This suits extensions that moved once and have since stopped.
Best for: Settled extensions with a stable gap at the junction
What happens during extension pulling away repairs, step by step?
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.
Repair the junction
Drains are repaired first if they are leaking. The joint is then tied, formed as a movement joint or rebuilt after underpinning, with roof flashings reset so the junction stays watertight. Building control is handled where needed.
Rules for extension pulling away 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 extension pulling away repairs in Rhondda
What is the price of extension pulling away repairs in Rhondda?
Guide prices for extension pulling away repairs in Rhondda start from about £550 per junction, 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 carry out extension pulling away repairs in Rhondda?
Yes, Rhondda is covered, along with postcode districts CF40, CF41, CF43. We also cover nearby Tonypandy and Mountain Ash.
Does the ground around Rhondda cause cracking?
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 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.
Is it normal for an extension to crack at the join?
A fine crack at the junction is fairly common, especially in the first few years as a new extension settles. It becomes a concern when the gap is widening, tapering, letting in water or matched by sticking doors and sloping floors. Those signs point to continuing movement.
More repairs we carry out in Rhondda
- Resin injection ground stabilisation
- Bay window subsidence repairs
- Retaining wall repairs
- Floor joist repairs
- Brick arch repairs
Extension pulling away repairs near Rhondda
Photos of the crack, the internal corner and the roof flashing are a good start; send them about your Rhondda home and we will reply with a view.