Twistfix

Structural Repairs

Many UK buildings can benefit from a program of structural repairs to reinforce dilapidated masonry walls that are cracked, bulged or otherwise weakened.

Masonry crack repair techniques utilise retrofit brick rein­for­cement to strengthen brickwork, improve load resistance and reduce the risk of cracking in brick, block and stone walls.

Structural damage has a detrimental effect on the load-carrying capacity of a component within a wall or the wall as a whole. Structural failure occurs when material is subjected to stresses beyond its limit of resistance, resulting in fracture or excessive deformation

What causes structural movement in buildings?

  • Ground movement – Subsidence, heave or slip
  • Vegetation – Tree roots, Japanese knotweed etc.
  • Size changes – Expansion or contraction induced by variations in moisture content or temperature
  • Corroding metals – forces imparted by the corrosive expansion of mild steel rein­for­cement, wall ties, etc.
  • Support deficiencies – brick arch or lintel failure
  • Inadequate lateral restraint – Walls buckling at mid-level or around openings
  • Wind, Vibration or Impact

What are the symptoms of structural damage?

  • Cracks in walls
  • Bowing or leaning brickwork
  • Dropped brick arches

The first aspect of any masonry repair scheme is to alleviate the cause of the movement where this is possible. For example attending to any ground movement problems and removing invasive vegetation. ; One can then concentrate on streng­thening and reinforcing the supers­truc­ture to provide resilience to further movement.

Using various combinations of retrofit rein­for­cement bars, lateral restraints and remedial ties, sagging and bowing tendencies can be alleviated. The use of brick rein­for­cement is a very simple and cost-effective way of enhancing the strength and durability of masonry construction by providing both structural and crack control benefits. Twistfix helical bars are available in a selection of lengths and diameters to offer an array of structural repair solutions for cracked walls

Stainless steel helical bars are used for masonry crack repair to stitch fractured walls. These brick rein­for­cement bars are commonly used in pairs and are inserted into the wall to form a deep masonry beam that supports and strengthens the zone above brick arches and lintels. ; Bowing or leaning facades can be tied to floor structures and cross walls to ensure structural repairs are long lasting as brickwork is stabilised and structural integrity is restored.

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Structural Repair Ties - 10Pk

Structural repair ties are extra long 12mm diameter drive-in helical wall ties that reinforce vulnerable masonry walls. Lengths 1070 (42"), 1220 (48") and 1370mm (54") - 10Pk
RRP
£276.42
Price incl. VAT
£199.50
Helical Bars 7M Long Kit

Helical bars in a kit for retrofit masonry rein­for­cement. High tensile 6mm x 7mm reinforcing bars, grout and fixing kit for structural repairs or for forming window-spanning brick beam lintels
RRP
£426.00
Price incl. VAT
£298.56
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.
RRP
£249.78
Price incl. VAT
£191.40
Crack Stitching Bars

These 6mm Crack stitching bars for masonry repairs and rein­for­cement of cracks in walls. High tensile (circa 8kN) helical bars for repairing a cracked wall permanently - Pack of 10
RRP
£69.60
Price incl. VAT
£53.40
Wall Anchor Kit - 910mm Spiral Fixings - 10 Ties

A Wall Anchor Kit with long-series drive-in wall ties that form a chemical-free structural connection. Quick and easy to install with no material compa­tibility issues. 10pcs 910mm ties, SDS Tool and 1m drill bit
RRP
£316.85
Price incl. VAT
£239.52
6mm x 7m Bed Joint Reinforcement

Retrofit bed joint rein­for­cement pack containing 6mm x 7m stainless steel helical bars. The 6mm reinforcing bar is the standard size rod used for most masonry repair appli­cations. Pack of 5
RRP
£243.60
Price incl. VAT
£186.90
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.
RRP
£262.26
Price incl. VAT
£202.80
Lintel Repair Kit

A lintel repair kit for professional masonry rein­for­cement. Helical bars span windows openings up to 2.5m wide to support brickwork above. Buy a 'Complete Kit' or a '14m Bars & Grout Only' kit.
RRP
£160.44
Price incl. VAT
£119.52
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
RRP
£191.22
Price incl. VAT
£143.40
Arch Repair Kit

Arch Repair Kit has everything needed the rein­for­cement of soldier courses, brick arches and stone lintels. Stainless steel rein­for­cement bars form masonry beams and brick ties securely pin arches into the reinforced zone
Price incl. VAT
£211.80
Masonry Repair Grout

Masonry repair grout for bonding helical stitching bars into cracked walls. High performance adhesive grout used for structural repairs and rein­for­cement. Tested at the BRE. Yield 3L
RRP
£63.00
Price incl. VAT
£47.76
Crack Sealer Plus

Crack Sealer Plus is a pure injection filler designed to bond those hard to fill narrow cracks in bricks, blocks, render and concrete. Small flexible nozzles enables masonry cracks as fine 2mm wide to be filled and sealed.
RRP
£59.51
Price incl. VAT
£46.55