County Londonderry · Northern Ireland
Wall tie replacement in County Londonderry
County Londonderry has its own mix of ground and building types, and that shapes how wall tie replacement is done here. Shrinkable clay is less common in County Londonderry than in south-east England.
Guide price from£1,600per house inc VAT
- Area
- County Londonderry
- Pricing region
- Northern Ireland
- Ground
- Mostly firmer ground
- Towns listed
- 4
What should you know about the ground under County Londonderry?
County Londonderry has basalt, older hard rock and glacial deposits, with soft river ground along the Foyle and Bann.
Ground movement here is more often linked to soils, drains and trees than to mining. What you mostly find across County Londonderry: Georgian and Victorian houses in Derry, brick terraces and post-war estates.
Methods for wall tie replacement
Removing old ties and rebedding
On badly cracked elevations the old ties are cut out from the outer face, the joints raked and rebedded, and the brickwork repointed. It is more work than isolation but removes the source of expansion entirely. An engineer or the survey report usually specifies where this is needed.
Best for: Elevations with severe cracking or lifting
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
From first photo to finished repair
Report and quote
You receive a written summary of what the survey found on each elevation, which walls need new ties, whether old ties should be isolated or removed, and a no-obligation written quote with scaffold shown separately.
Install the new ties
New stainless ties are drilled and fixed to the specified grid, with closer spacing around windows, doors and the roofline. Sample ties can be pull-tested to confirm they are holding in your particular brick and block.
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.
Symptoms that point to wall tie replacement
- Horizontal cracks along mortar joints, repeating every few brick courses
- Outer brickwork bowing or bulging, often worst near the top
- A house built before the 1980s on an exposed or coastal site
- Cracked render with a regular horizontal pattern
Guide prices for wall tie replacement in County Londonderry
For County Londonderry we use Northern Ireland rates. Treat the table as a budget guide, inc VAT; the price you pay is the one on your written quote.
| Item | Guide price | Per |
|---|---|---|
| Mid-terrace houseest. | £1,600 – £3,100 | per house |
| Semi-detached house | £2,200 – £4,400 | per house |
| Detached houseest. | £3,100 – £6,150 | per house |
| Scaffolding where neededest. | £530 – £1,600 | per elevation |
Do you need approval for wall tie replacement in Northern Ireland?
In Northern Ireland, minor repairs usually need no approval, but structural work comes under the Building Regulations (Northern Ireland) 2012 and council building control. There is no Party Wall Act in Northern Ireland.
Find wall tie replacement in your County Londonderry town
Frequently asked questions
Why do houses in County Londonderry crack?
County Londonderry has basalt, older hard rock and glacial deposits, with soft river ground along the Foyle and Bann. Ground movement here is more often linked to soils, drains and trees than to mining. Only an investigation on site can say why a particular building has moved.
How much will wall tie replacement cost in County Londonderry?
On Northern Ireland rates, wall tie replacement starts from about £1,600 per house, including VAT. The written price depends on the extent of the damage, access and whether an engineer or building control is needed.
Is wall tie failure covered by insurance?
Usually not, because insurers treat it as gradual deterioration. Damage caused by a sudden event, such as part of a wall collapsing in a storm, may be treated differently under some policies. Check your policy wording, and tell your insurer if you are unsure.
Will a mortgage lender accept wall tie replacement?
Lenders generally accept properly carried out tie replacement, but they may want to see the survey, the quote or a record of the completed work. If a valuation has flagged wall ties, a written report and itemised quote are usually what the lender or buyer needs next.
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.