Structural Repairs & Strengthening

Restoring load capacity, extending service life, keeping structures in use

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Service Overview

Structural repair and strengthening covers the interventions that keep a concrete structure carrying the loads it was designed for, or upgraded to carry loads it was not. Reinforcement that has corroded, section loss that has compromised capacity, added floor loading, changed use, discovered design shortfalls, or damage from impact, fire or seismic events. Each requires a different engineering response.

CRS delivers the full range of structural repair and strengthening techniques used in the UK. Reinforcement replacement and section reinstatement where load capacity has been lost. Carbon fibre (CFRP) plate and wrap systems where additional flexural, shear or confinement capacity is needed. Steel plate bonding for beam and slab strengthening. Post-installed reinforcement where new elements are added to existing structures. Concrete jacketing for column and pier upgrades.

Every strengthening scheme is delivered against a structural engineer’s design. Where a design already exists, CRS delivers to it. Where an engineer needs a specialist contractor’s input at the specification stage, we contribute to the design through our consultancy service, working within the engineer’s technical framework.

Materials are selected from approved system suppliers including Sika, Weber and Mapei. Installation is delivered by trained applicators to the system manufacturer’s specification, ensuring warranties remain valid and long-term performance is maintained. Load testing and verification is arranged where the specification calls for it.

Structural repair and strengthening work is often delivered in occupied buildings, live infrastructure environments, or against tight programme constraints. CRS plans phasing, access, temporary works and site logistics to keep the structure in use throughout wherever possible.

What this service covers

Carbon Fibre (CFRP) Strengthening

Carbon fibre plate bonding and fabric wrap systems for flexural, shear and confinement strengthening of beams, slabs and columns. Delivered to engineer’s design using approved system materials.

Steel Plate Bonding

External steel plate bonding to beams and slabs where load capacity requires upgrade. Includes surface preparation, bonding agent application, plate installation and long-term protection.

Post-Installed Reinforcement

Drilled and chemically anchored reinforcement bars for connecting new elements to existing structures, strengthening deficient sections, or adding capacity where required by engineer’s calculations.

Concrete Jacketing

Full or partial concrete jacketing to columns, piers and other elements requiring section enlargement or additional confinement. Reinforcement added and encased to engineer’s specification.

Section Reinstatement

Reinstatement of load-bearing section lost to corrosion, impact damage, fire or deterioration. Includes reinforcement replacement, formwork, and repair using structural-grade approved mortars or concrete.

Structural Crack Stitching

Mechanical stitching, stapling and reinforced injection systems to restore structural continuity across cracks in load-bearing elements. Designed and delivered against engineer’s requirements.

Why choose Concrete Repair Solutions?

Technical depth

Structural strengthening requires more than material application. We work within the engineer’s design, understand the load paths, and deliver to the tolerances the calculations depend on. Where design input is needed, our consultancy service supports the engineer directly.

Whole life of the structure

CRS surveys, repairs, strengthens and protects. The same team that delivers the strengthening returns for future inspections, load monitoring and maintenance. One point of accountability for the strengthened element across its remaining service life.

Accredited and approved

SafeContractor accredited, with a CSCS-carded workforce and SSSTS-qualified site supervision. IRATA Level 3 rope access operatives for strengthening work at height. Independent external HSQE consultancy oversight of health, safety, quality and environmental management on every project.

Track record

Structural strengthening delivered across bridges, car parks, commercial buildings, residential high-rise and industrial assets throughout the UK. Live projects viewable in the Projects section.

Our process

1. Survey & Diagnose

Structural inspection, defect mapping, load path assessment and coordination with the engineer’s design. We identify what is failing, why, and what the strengthening intervention needs to achieve.

2. Specify & Cost

A written specification setting out the strengthening scope, materials, methodology and phasing. Costed against a defensible bill of quantities, ready for tender or direct appointment. Coordinated with the engineer’s design where required.

3. Mobilise & Deliver

Site setup, access provision (including rope access where relevant), temporary works, RAMS submission and delivery. Installation to system manufacturer’s requirements to maintain warranty. Progress reported at agreed intervals.

4. Protect & Hand Over

Final quality checks, load verification where specified, protection systems applied, and a handover pack covering the works completed, materials used, and recommended future inspection cycles.

Recent projects

Related Surveys & Services

Frequently asked questions

CFRP is used where additional load capacity is needed without significantly increasing section size or weight. Common applications include upgrading beam and slab capacity to meet new loading requirements, adding shear resistance, or confining columns to improve seismic performance. It works well in occupied buildings because installation is fast and clean compared to concrete jacketing. The engineer’s design determines whether CFRP or an alternative is appropriate for the specific structure and loading.

Yes. A large proportion of structural strengthening is delivered in buildings that remain in occupation, including commercial premises, residential blocks and operational infrastructure. CFRP systems in particular are well-suited to occupied environments because installation is faster, quieter and less disruptive than concrete-based strengthening. Programme, phasing, access and dust management are planned to minimise disruption.

Alkali silica reaction (ASR) is a chemical reaction between alkalis in the cement and reactive silica in the aggregate, causing expansion and cracking within the concrete. Strengthening can address the structural consequences of ASR damage, typically through confinement systems that restrain further expansion, combined with concrete repair to address the cracked material. Investigation is essential first to confirm the extent of the reaction and whether it remains active.

Both. CRS delivers strengthening schemes to a structural engineer’s design in the normal way. Where an engineer wants specialist contractor input at design stage, our Specialist Consultancy service supports this. We do not act as the engineer of record, but contribute technical input on constructability, system selection and specification within the engineer’s framework.

Yes. CRS can be appointed as Principal Contractor on schemes where required, with full CDM 2015 compliance. On projects where a different Principal Contractor is appointed, we work as their specialist sub-contractor and provide the technical and safety documentation their role requires.

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