Twistfix

Lateral Restraint

Builders must fix walls to floor and roof structures in new construction. Tension straps provide lateral restraint to the inner skin of a cavity wall by securing it to ceiling joists and rafters. Wall ties hold the brick façade to the constrained inner wall. The components transfer horizontal forces on the wall to the building's main structure to prevent bulging.

Most older buildings have no mechanical link between the walls and the floor diaphragms. They rely purely on friction to provide the wall-to-floor connection. Over time, the unrestrained walls can start to bulge.

What Causes Masonry Walls to Bow, Bulge or Buckle?

Brickwork can move out of plane due to the following.

  • Repeated cycles of wind pressure and suction may cause a wall to bow.
  • The eccentricity of vertical loads can cause walls to buckle.

How is Lateral Restraint added to Existing Walls?

For centuries, tie-rods and pattress plates have been commonplace in stabilising bowing walls. The spreader plate takes the load. The repair is intrusive and unsightly.

Modern repair methods use a series of lightweight ties. Smaller anchors in more significant numbers spread the loads along the entire wall length. This system stabilises bulging brickwork, adding lateral restraint with little disturbance to the building or its occupants.

Ties for wall-to-floor connections.

Lateral restraint ties are very long drive screws. Install the stainless-steel anchors through the wall and into the flooring diaphragm. Screw them into at least two ceiling joists for a firm anchorage. Fix the tie's masonry end with a construction adhesive. The lower-strength brickwork connection governs the tie's tensile performance.

Ties for wall junctions.

Where the façade of a building is bulging, it is likely separating from walls running at right angles to it. Cracks may be visible at cross-wall partitions or party wall junctions. Use long spiral anchors to reconnect and strengthen wall junctions. You can fix long ties with an adhesive or utilise the dry-fixing action of a helical drive-tie.

Twistfix supplies various kits for restraining bulging walls. Please phone us for expert technical advice. You can order lateral restraint ties by phone or buy them online. We offer a fast UK delivery service.

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Lateral Restraint Wall Tie Kit

Lateral Restraint Wall Tie Kit

Lateral restraints in a kit for restraining a bulging masonry wall by tying it back to structural flooring members. Repair kit includes 5 lateral restraint ties, resin, drill bit and setting tool.
Price excl. VAT
£181.36
Price incl. VAT
£217.63
Lateral Restraint Ties

Lateral Restraint Ties

Retrofit lateral restraint tie for softwood. Ties a masonry wall to parallel floor joists in remedial applications. These stainless steel tie bars are suitable for use in solid or cavity walls. - Pack of 5
Price excl. VAT
£104.86
Price incl. VAT
£125.83
Brick Pin Fixing Kit

Brick Pin Fixing Kit

A brick pin fixing kit for repairing cracks in walls. These masonry stitching pins are supplied for tying brick buildings, bridges and tunnels. Kit includes 10 heavy duty helical tie bars.
Price excl. VAT
£161.50
Price incl. VAT
£193.80
Wall Anchor Kit - 910mm Spiral Fixings - 10 Ties

Wall Anchor Kit - 910mm Spiral Fixings - 10 Ties

Wall Anchor Kit with extra-long drive-in wall ties. Quick and easy to fit chemical-free structural connectors, no material compatibility issues. 10pcs 910mm ties, SDS Tool and 1m drill bit
Price excl. VAT
£205.58
Price incl. VAT
£246.70
Retrofit Wall Connectors - 10Pk

Retrofit Wall Connectors - 10Pk

Retrofit Wall Connectors are long-series, 12mm diameter spiral wall ties that are driven deep into masonry to form a mechanical connection that needs no cement, grout or resin. Available 610, 760 and 910mm - 10Pk
Price excl. VAT
£123.08
Price incl. VAT
£147.70
Structural Repair Ties

Structural Repair Ties

Structural repair ties are extra long 12 mm diameter drive-in helical wall ties that reinforce vulnerable masonry walls. Lengths 910 mm (36") to 1670 mm (66") in 150 mm (6") increments. Pack of 10.
Price excl. VAT
£153.98
Price incl. VAT
£184.78