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Structural Repairs - Cracked Walls
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.