Client
State of Jersey
Value
£2.3M
Sectors & Services
Multi-Storey Car Parks Concrete Repair Condition Surveys Coatings Corrosion Control Membranes Cleaning & Preparation Bearing Replacement Projects
Green Street Multi-Storey Car Park in St Helier is a strategically important public parking asset operated by the Government of Jersey. Constructed as a reinforced concrete structure, the facility required a comprehensive refurbishment in 2019 as part of an ongoing asset management and maintenance programme funded through parking revenue.
The works were driven by age-related deterioration, concrete delamination, corrosion risk and failing waterproofing systems, all of which posed a threat to long-term durability and user safety. The project focused on extending the service life of the structure while maintaining public access, improving functionality, and upgrading safety and environmental performance through modern materials and systems.
Services undertaken
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Removal existing coatings
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Extensive concrete repairs to decks, soffits, columns and walls
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Application of anti-carbonation coatings to all concrete surfaces
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Deck joint sealant replacement
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Removal of existing membranes and coatings
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Replacement of the existing cathodic protection system
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Application of hydrogel treatment and migrating corrosion inhibitors
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Installation of new bearings on newly formed corbels
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Structural alterations to accommodate movement joints
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Ongoing traffic and pedestrian management while maintaining public access
The refurbishment works, delivered by CRL, were undertaken from Ground Level to Level 5 and combined specialist concrete repairs with structural and protective interventions. Initial investigations included detailed concrete delamination surveys, enabling repairs to be accurately scoped and prioritised. Existing coatings and membranes were removed through pressure washing, planing and enclosed captive shot blasting, providing a clean, mechanically prepared substrate suitable for high-performance systems.
Extensive concrete repairs were completed to decks, soffits, columns and walls, followed by the application of anti-carbonation coatings to all concrete surfaces to limit further ingress of carbon dioxide. Deck joints were replaced, and anti-slip waterproof deck coatings were installed using a rapid-curing Triflex PMMA system with quartz aggregate, minimising downtime while delivering long-term performance. Line markings and information symbols were reinstated to enhance traffic flow and pedestrian segregation.
Structural works formed a critical element of the scheme. Beams were back-propped to ground level to allow controlled release of structural sections, enabling the installation of new bearings on newly formed corbels. This restored movement capability at joints and improved structural resilience. The existing cathodic protection system was replaced with an innovative impregnation waterproof solution incorporating hydrogel treatment and migrating corrosion inhibitors applied to decks, parapets and walls.
Throughout the project, CRL demonstrated its expertise in complex concrete repairs and structural repairs UK, delivering the works safely while the car park remained operational. Operating under an NEC3 Option A contract, CRL’s collaborative approach, technical competence and proactive problem-solving ensured programme certainty and high-quality outcomes despite increased repair volumes and additional bearing replacements.
“By working closely with CRL with open communication and an equal ambition to deliver a great project, we were able to overcome issues in a timely and cost-effective manner. This enabled the project to finish on programme, despite much larger areas of repair being required’
Ross Fearnley | Project Manager | Government of Jersey
Long-term durability and protection were central to the refurbishment strategy. Comprehensive surface preparation, including water blasting, shot blasting and planing, ensured optimal adhesion of protective systems. The application of hydrogel treatments and migrating corrosion inhibitors provided deep-seated corrosion prevention, reducing the likelihood of future reinforcement deterioration. Anti-carbonation coatings to all concrete elements further limited environmental attack, while the Triflex PMMA anti-slip waterproof deck system delivered a seamless, resilient barrier against water ingress.
These measures collectively enhance structural resilience, reduce future maintenance liabilities and extend the service life of the asset. The adopted colour-coded deck coatings improve safety and usability while supporting consistent standards across Jersey’s parking portfolio. By integrating advanced materials with robust workmanship, CRL delivered a refurbishment that protects the structure well beyond the immediate repairs, supporting sustainable asset management and long-term operational performance.
