Llantrisant · Mid Glamorgan
Extension pulling away repairs in Llantrisant
Repairing a separating extension in Llantrisant can be as simple as tying the junction or as involved as underpinning. The choice rests on the movement history and the ground, and we confirm a fixed written price once the repair is specified.
Guide price from£550per junction inc VAT
- Postcodes
- CF38, CF72
- Population
- about 14,000
- Area
- Mid Glamorgan
- Pricing region
- Wales
How do local ground conditions affect extension pulling away repairs in Llantrisant?
Llantrisant, Mid Glamorgan: about 14,000 residents across postcode districts CF38, CF72. We also take enquiries from nearby Pontypridd (4 miles), Tonypandy (7 miles) and Caerphilly (7 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. What you mostly find across Mid Glamorgan: long stone and brick terraces on valley sides, Victorian houses in Bridgend and post-war estates.
What to expect when we carry out extension pulling away repairs
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.
Finish and hand over
Internal corners are replastered, skirtings and coving refixed, and doors or windows in the extension eased where the movement affected them. Records of the repair and any approvals are passed to you.
Is it time for extension pulling away repairs? Common signs
- Patio doors or windows in the extension starting to bind
- Extension roof flashing lifting off the original wall
- A vertical crack or gap where the extension meets the house
What should you budget for extension pulling away repairs in Llantrisant?
Guide prices below are for homes in Llantrisant, on Wales rates and including VAT. A survey or good photos let us turn them into a fixed written price.
| 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 |
Repair options we may recommend
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
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.
Your extension pulling away repairs questions
What is the price of extension pulling away repairs in Llantrisant?
Guide prices for extension pulling away repairs in Llantrisant 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 Llantrisant?
Yes. We take enquiries from across Llantrisant, including CF38, CF72, and from nearby places such as Pontypridd and Tonypandy. Send photos for a free initial view and we will tell you what happens next.
Does the ground around Llantrisant 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.
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 a drain under my extension cause it to move?
Yes, a cracked or displaced drain beneath or beside an extension can soften clay or wash away fine soil. A CCTV drain survey usually finds it. Repairing the drain is often the first and most important step before any repair to the walls.
More repairs we carry out in Llantrisant
- Lintel replacement
- Crack stitching
- Bowing wall repairs
- Boundary and garden wall repairs
- Structural crack repairs
Extension pulling away repairs near Llantrisant
If the junction at your Llantrisant property keeps reopening, send dated photos and we will suggest whether monitoring, a drain survey or a repair comes next.