Wall tie replacement, confirmed by boroscope survey.
Corroded, weakened or insufficient wall ties reduce the stability of a cavity wall. Our qualified wall tie surveyor examines the construction directly before any replacement is recommended.
Bensleys’ qualified wall tie surveyor will carry out a detailed examination of the wall construction using a boroscope, to determine whether additional or replacement wall ties are required.
Corroded cavity wall ties can cause damage to the mortar joints where they are embedded in-between the brickwork. This can cause bowing of the walls or lifting of the brickwork and damage to the internal or external finishes. If moisture comes into contact with steel wall ties it can cause corrosion, which in turn can lead to wall ties increasing to several times their original size. In some cases this can make the property unstable and even cause walls to topple.
Similarly, weakened, broken, or damaged ties — or an insufficient number of ties — will reduce the stability and strength of cavity walls, making the property itself unstable. That’s why it’s important to identify any defects as soon as possible and carry out remedial works to correct the problem, otherwise it may be necessary to re-build the affected walls.
Wall ties will be installed by Bensleys’ specialist trained operatives following current regulations, and will include isolating existing wall ties and any associated making good. A survey inspection can be carried out by Bensleys’ surveyor, followed by a detailed report, recommendations and estimate.
Why a boroscope survey matters
Wall tie corrosion happens inside the cavity, invisible from either face of the wall until the damage — bowing, cracking, lifted brickwork — is already showing. A boroscope lets our surveyor see the actual condition of the ties before any work is specified, rather than guessing from external symptoms alone
Warning Sign
Bowing or bulging walls
Corroding ties expand, pushing the brickwork outward and cracking mortar joints along the way.
Warning Sign
Horizontal cracking
Cracks that follow the mortar bed joints, at tie height intervals, are a classic sign of tie failure.
Risk if ignored
Wall instability
Left unaddressed, insufficient or failed ties reduce the wall's strength to the point where rebuilding, not replacement, becomes necessary.
How we fix it
From boroscope survey to a stable wall.
Boroscope survey
Our qualified wall tie surveyor examines the cavity construction directly, confirming the condition and spacing of existing ties.
Report & estimate
A detailed report with recommendations and an estimate is provided before any work is carried out.
Isolation of existing ties
Failed or corroded ties are isolated so they can no longer transfer load or corrosion damage into the wall.
Replacement & making good
New ties are installed by our specialist trained operatives following current regulations, with all associated making good included.
Related services
Other structural solutions.
External Re-rendering
Lime-based or insulation-backed renders, applied by our own fully trained plasterers, with modern waterproofing options available.
Find out moreMasonry Stitching
External masonry repairs for movement caused by thermal effects, subsidence, lintel failure or weathering — stabilising the wall structure.
Find out moreFrequently Asked Questions
Find clear answers for Wall Tie Replacement.
How do you check whether wall ties need replacing?
What signs suggest a wall tie problem?
Why do steel wall ties corrode and what does that lead to?
What happens if wall ties are left untreated?
Seeing bowing walls or horizontal cracking? Get a boroscope survey.
Identifying wall tie defects early means replacement, not rebuilding.