Helifixing: The Permanent Solution for Cracked Walls

Cracks in masonry are not just ugly. They are warnings. Differential settlement, thermal expansion, lintel failure, or vibration can all split brick and stone. Left alone, cracks widen, water enters, and structural integrity degrades. Helifixing is the surgical solution — and when combined with rope access, it is also the least disruptive.

What Is Helifixing?

Helifixing — also known as crack stitching — involves installing helical stainless steel bars into bed joints across a crack. The bars are bonded with structural grout and act like stitches in a wound, pulling the masonry back together and distributing loads across the crack line.

Unlike traditional rebuilding, helifixing does not require dismantling brickwork. The repair is concealed within the mortar joints, leaving the façade intact. It is approved by Historic England, Historic Environment Scotland, and structural engineers worldwide.

How the Installation Works

1. Survey: We map the crack pattern, identify the cause, and specify bar spacing and grout type.
2. Slot cutting: Narrow slots (6–8 mm) are cut into bed joints at 450–600 mm centres using specialised diamond blades.
3. Bar insertion: HeliBar stainless steel rods are pushed into the slots and fully encapsulated with cementitious or lime grout.
4. Repointing: Slots are repointed with colour-matched mortar. On most elevations the repair is invisible.

When to Use Helifixing

• Vertical or stepped cracks in external walls caused by settlement or thermal movement.
• Cracks above windows and doors where lintels have sagged or corroded.
• Gable-end cracking caused by wind vibration or roof spread.
• Listed buildings where rebuilding or external reinforcement is not permitted.

Helifixing from Rope Access

On tall Edinburgh tenements, scaffold for a single crack repair can cost more than the repair itself. Our IRATA-certified helifixing technicians rig from the roofline, cut slots, insert bars, and repoint — all while suspended. The building occupants barely know we are there.

Rope access helifixing is particularly valuable on:

• Four-storey-plus tenements with no rear access.
• Conservation areas where scaffold is visually intrusive.
• Properties with cracked gables above roof level.

What Does It Cost?

A typical rope access helifixing repair on an Edinburgh townhouse ranges from £1,200–£3,500 depending on crack length, elevation difficulty, and access constraints. By comparison, scaffold plus traditional rebuild can exceed £8,000–£15,000 for the same defect.

We provide fixed-price quotes after a free visual survey. For insurance claims, we supply structural engineers' reports and photographic evidence as standard.

Is Helifixing Permanent?

Yes. Stainless steel HeliBars are designed to outlast the building. Unlike carbon steel wall ties, they do not corrode. Unlike resin-injected cracks, they actively reinforce the wall rather than simply filling the gap. Provided the underlying cause of movement is addressed — for example, improving drainage or repairing gutters — the repair will last the lifetime of the structure.