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Case Study

Cathedral Court

London
TRC were appointed to deliver the £430,000 window restoration and replacement scheme at Cathedral Court, acting as Principal Contractor across two phases from March 2025 to June 2026.
Services provided
TRC were appointed to deliver the £430,000 window restoration and replacement scheme at Cathedral Court, acting as Principal Contractor across two phases from March 2025 to June 2026.

At Cathedral Court, TRC Windows was appointed to carry out external window renovation, decoration and associated works, including the design and manufacture of high-performance replacement sashes alongside brickwork and stone cill repairs.

Following the successful completion of Phase One, TRC was appointed to deliver Phase Two of the project, a continuation that reflects a strong working relationship with both the client and contract administrator, built up across multiple previous schemes.

A Bespoke Approach to Timber Window Refurbishment

A key element of this phase involved developing a bespoke methodology for timber window refurbishment, carefully aligned with the client’s conservation and performance requirements. The works comprised the repair, restoration and modification of existing timber windows, along with the provision of like-for-like replacement sashes where retention was not feasible. The project incorporated the production of Control Samples and Benchmark Windows, each subjected to stringent quality assurance inspections, ensuring the refurbishment methodology met the required conservation standard before being rolled out across the wider scheme.

Refurbishment works included comprehensive cleaning of frames and glazing, the removal of debris, excess paint and protective films, and the replacement of missing or damaged historic glass with carefully matched alternatives. Sashes were reshaped and realigned, sash cords renewed, and mechanical components overhauled to restore smooth operation, with each refurbished window fitted with a Draftfix draught-proofing system to improve thermal performance and usability.

Timber repairs were carried out using a combination of established RepairCare techniques, modern splicing methods and bespoke timber inserts, with carefully selected timber species ensuring compatibility and minimising the loss of original material. Conservation joints were introduced to improve durability, defective putty was replaced with a modern, long-lasting alternative, and all repaired surfaces were finished using a Dulux Weathershield water-based system – including primer, undercoat and topcoat – for a durable, environmentally responsible finish. Sympathetic repairs were also carried out to stone cills, along with brickwork repointing and mastic sealing to prevent future water ingress.

Client Cathedral Court Ltd
Project value £430,000 – Phases 1 & 2
Project duration March 2025 – June 2026

Overcoming Access Restrictions to Deliver a Lasting Result

The principal challenge on site was establishing safe and effective access to the work areas, with restrictions on erecting traditional tubular scaffolding and the proximity of neighbouring commercial properties limiting the options available. To overcome this, TRC engaged a specialist design engineer to develop a tailored access solution, with close coordination between the client and stakeholders ensuring the agreed approach minimised disruption while maintaining safety and operational efficiency throughout.

Specialist conservation techniques were employed throughout to protect and preserve the building’s historic fabric, supported by a highly skilled and experienced workforce, robust project management and supervision, close collaboration with the client and contract administrator, and a detailed project programme ensuring controlled and efficient delivery.

This structured approach ensured all works were completed to the required conservation standards without compromising quality or timelines, with the project on track for completion within the agreed programme and budget. The Cathedral Court window refurbishment represents a complex and carefully executed conservation project, successfully delivered by TRC. Upon completion, the restored windows will significantly improve the building’s visual appearance and preserve its original architectural character through accurately replicated replacement sashes, while improving thermal efficiency, overall performance and ease of operation – contributing to the long-term preservation of Cathedral Court for future generations.

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