Southwark · Greater London
Wall tie replacement in Southwark
Plenty of cavity-walled houses, in Southwark as elsewhere, were built when galvanised steel ties were standard, and those ties are now reaching the end of their life. A survey shows whether yours are sound, thinning or actively swelling and cracking the brickwork.
Guide price from£2,250per house inc VAT
- Postcodes
- SE1, SE5, SE8, SE11, SE14
- Population
- about 310,000
- Area
- Greater London
- Pricing region
- London
What should you know about the ground under Southwark?
Southwark is one of the 32 London boroughs, with around 310,000 residents in districts such as SE1, SE5, SE8, SE11, SE14. Nearby, we also cover Lambeth (2 miles), Lewisham (3 miles) and Tower Hamlets (4 miles).
Greater London is one of the parts of the UK where clay soils are most likely to move with the seasons. Ground movement here is more often linked to soils, drains and trees than to mining. What you mostly find across Greater London: Victorian and Edwardian terraces with shallow footings, inter-war semis in the outer boroughs, and converted flats and mansion blocks.
What to look for before calling about wall tie replacement
- Horizontal cracks along mortar joints, repeating every few brick courses
- The roof edge or verge lifting slightly above the brickwork
- Mortar joints that look wider or opened up on one elevation
Wall tie replacement prices in Southwark
Guide prices below are for homes in Southwark, on London rates and including VAT. A survey or good photos let us turn them into a fixed written price.
| Item | Guide price | Per |
|---|---|---|
| Mid-terrace houseest. | £2,250 – £4,400 | per house |
| Semi-detached house | £3,100 – £6,250 | per house |
| Detached houseest. | £4,400 – £8,750 | per house |
| Scaffolding where neededest. | £750 – £2,250 | per elevation |
How we usually approach wall tie replacement
Remedial tie installation
New stainless ties are drilled through the outer leaf into the inner leaf, then fixed by mechanical expansion or resin, depending on the masonry. They are placed to a set grid across each elevation, with extra ties around openings and at the edges. Holes are made good in matching mortar.
Best for: Walls where the original ties have failed or are missing
Isolating the old ties
Where the old ties are swelling and cracking the brickwork, fitting new ties alone may not stop further damage. Each old tie can be isolated, usually by cutting it through within the cavity or sleeving its outer end, so it can no longer lift the outer leaf as it continues to corrode.
Best for: Thick mild steel ties still causing horizontal cracking
What happens during wall tie replacement, step by step?
Tie survey
A metal detector locates the existing ties and shows their pattern. Small holes are then drilled at sample points and a borescope passed into the cavity to see the tie condition, type and embedment. The holes are made good afterwards.
Access
Ties are fitted across the whole of each affected elevation, so scaffold or a tower is usually needed above ground floor. We plan access around conservatories, extensions, neighbours’ land and any parking that must be suspended.
Deal with the old ties and make good
Old ties are isolated or removed where the report calls for it, cracked joints are raked out and repointed, and drilled holes are filled in matching mortar. A written note of tie positions and findings goes in your property file.
Rules for wall tie replacement in England
Like-for-like repairs such as crack stitching and repointing do not usually need building control approval in England, but anything that changes or strengthens the structure, such as underpinning or rebuilding a wall, does. If the work touches a party wall, the Party Wall etc. Act 1996 may apply.
Questions about wall tie replacement in Southwark
What is the price of wall tie replacement in Southwark?
Guide prices for wall tie replacement in Southwark start from about £2,250 per house, including VAT, on London rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.
Do you carry out wall tie replacement in Southwark?
We do. Southwark and the surrounding area are covered, including nearby Lambeth and Lewisham. A free initial assessment from your photos is the first step.
Does the ground around Southwark cause cracking?
Most of Greater London sits on London Clay, among the most shrinkage-prone ground in the UK, with river gravels along the Thames. Subsidence claims here are among the most frequent in the country, especially after dry summers and near street and garden trees. Only an investigation can say why a particular building has moved.
Do the old wall ties have to be removed?
Not always, because thin wire ties that cannot swell are usually left in place once new ties are fitted. Thicker ties that are still expanding and cracking the wall are isolated or removed so they stop causing damage. The survey decides which applies.
How do I know if my wall ties have failed?
The clearest sign is horizontal cracking in the mortar joints repeating every few courses, often with a bulge or a lifted roofline. Wire ties can fail with no cracking at all, so a tie survey with a metal detector and borescope is the only reliable check.
More repairs we carry out in Southwark
- Concrete repairs
- Structural surveys and crack monitoring
- Underpinning
- Floor joist repairs
- Roof structure repairs
Wall tie replacement near Southwark
If your Southwark home has a bulging outer wall, send photos from a few angles and we will help you decide what needs checking first.