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Stepped brick cracks
Cracking following mortar joints through brick or block masonry, often around openings or changes in load.
Masonry crack repair specialists
Helibar Crack Stitching & Structural Repairs
Targeted reinforcement for suitable cracked brickwork, failed lintel areas and localised masonry movement across South West London and Surrey.
- Diagnosis before repair
- Concealed reinforcement
- South West London & Surrey
Understand the crack first
Structural masonry repairs should follow diagnosis
Cracks can result from thermal movement, localised settlement, failed lintels, altered openings, weak mortar or other building movement. Crack stitching can reconnect and reinforce masonry, but it does not remove every underlying cause.
Atruss Preservation considers the crack pattern, wall construction, openings and evidence of continuing movement before proposing work. Where the cause or risk lies outside the repair scope, further structural advice may be appropriate.
Problems we assess
Common structural masonry defects
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Lintel-related cracking
Cracks above windows and doors where the support, bearing or surrounding masonry may be defective.
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Wall separation
Localised loss of connection between adjoining walls or sections of masonry requiring an engineered detail.
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Cracked elevations
Movement cracks in external walls where reinforcement may help redistribute tensile loads.
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Altered openings
Cracking associated with previous structural alterations, enlarged openings or inadequate support.
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Uncertain movement
Cracks that may be active or significant and should be investigated before any cosmetic repair.
Important: Crack stitching is not a substitute for diagnosing subsidence, drainage problems, foundation movement or an unsafe structure.
Helibar installation images
The crack-stitching process
The illustrations below show the typical sequence. Bar spacing, slot length, depth, grout and detailing must suit the wall and repair design.
Step 1
Form the slot
Cut or rake a horizontal mortar-bed slot across the crack to the specified length and depth.
Step 2
Clean and grout
Remove dust and loose material, dampen where specified, then place the first bed of structural grout.
Step 3
Bed the HeliBar
Press the stainless-steel helical bar into the grout and apply the specified covering layer.
Step 4
Finish the joint
Make good the slot with an appropriate finish so the reinforcement is concealed within the wall.
Why helical reinforcement?
Stainless-steel crack stitching for masonry
Helical reinforcement is installed across a crack within selected mortar beds. Bonded into compatible structural grout, the bars help reconnect the masonry and distribute tensile loads away from the damaged area.
- Low-disruption reinforcement within mortar beds
- Suitable for brick, block and some stone masonry details
- Concealed after the slot is made good
- Can reduce the need for localised rebuilding in suitable cases
- Repair pattern tailored to the crack and wall construction
Structural repair scope
Depending on the defect and specification, work may include crack stitching, local masonry rebuilding, lintel repair or replacement, repointing and associated making good.
Discuss a crack repairProject example
View Helibar case studyHelibar Crack Repair Case Study
See the crack pattern, preparation, stainless-steel bar installation, structural grout application and finished masonry repair.
Structural repairs near you
South West London and Surrey coverage
Atruss Preservation undertakes appropriate crack stitching and masonry repairs in Wimbledon, Raynes Park, Tooting, Wandsworth, Putney, Barnes, Clapham, Battersea, Richmond, Kingston, Sutton and nearby areas.
Frequently asked questions
Questions about Helibar crack repair
What is Helibar crack stitching?
Crack stitching reinforces cracked masonry by installing stainless-steel helical bars into selected mortar-bed slots and bonding them with compatible structural grout.
Can every wall crack be repaired with Helibars?
No. The cause and significance of cracking should be assessed first. Active movement, foundation problems or other defects may require additional investigation and a different repair design.
Are the bars visible after installation?
The reinforcement is concealed within the mortar beds. Slots are made good with an appropriate finish selected to suit the wall.
Can crack stitching repair cracks above windows?
It may form part of a repair where cracks relate to a lintel or opening, but the support and cause must be assessed. A defective lintel may require repair or replacement in addition to masonry reinforcement.
Do you repair cracks throughout South West London?
We provide appropriate structural masonry repairs across South West London and Surrey, including Wimbledon, Wandsworth, Tooting, Putney, Kingston and Sutton.
Need advice about cracked masonry?
Call Atruss Preservation to discuss the crack pattern and arrange the next step.