Redcar Central Train Station, North Yorkshire

Technical Case Study Overview

The restoration of Redcar Central Train Station represents a significant heritage regeneration project, transforming a long-derelict Victorian structure into a fully operational transport hub and commercial space.

Originally constructed in the 1860s as part of the Stockton to Darlington Railway expansion, the Grade II listed station had been out of rail use since the late 1980s and fell into complete disrepair following closure in 2013.

The project focused on restoring the station’s architectural character while delivering a modern, functional space.

Key historic features, including the red brick Flemish bond construction, ashlar detailing, Welsh slate roof and glazed train shed, were retained and carefully refurbished.

As the only station in Cleveland to retain its original train shed, preserving the building’s historic integrity was central to the design approach.

Project challenges

The primary challenge was the full refurbishment of the station’s 1,520 m² slate roof. This formed a critical part of the building envelope and required a solution that could meet modern performance standards without compromising the original design.

A key requirement was the careful salvage and reuse of existing Welsh slate wherever possible. Where replacement was necessary, particularly on the engine shed, new slate had to closely match the original in both appearance and performance.

The project also needed to address long-term moisture management, weather resistance and durability, particularly given the exposed coastal location.

Additional complexity was introduced by the glazed train shed, including a continuous 52 metre skylight that required a robust and sympathetic weathering solution.

Technical solution

A full reroofing system was specified using Permavent Apex as the primary roofing underlay, alongside Permaflex for detailing and weatherproofing of the glazed elements.

Permavent Apex is a three layer, air open and vapour permeable membrane designed to manage moisture within the roof structure while maintaining a weather resistant external barrier.

It's performance is particularly suited to heritage applications, where traditional construction relies on the natural movement of moisture through the building fabric.

The roofing underlay allows moisture vapour to escape while preventing the ingress of wind driven rain, reducing the risk of condensation, rot and long-term structural damage. By removing the need for both low and high level ventilation, the system enabled the original roof design to be maintained without introducing additional detailing that could affect the building’s appearance.

Apex also provided high water resistance and UV stability during the installation phase, which was essential given the scale of the roof and the exposed coastal environment.

It's lightweight construction and integrated tape system supported efficient installation, reducing material waste and limiting disruption to the existing structure.

Permaflex was specified as a lead free flashing solution for the glazed train shed. Installed along the 52 metre continuous skylight, it provided a durable and flexible weatherproofing layer compatible with the complex detailing of the roof. Its high adhesion and ability to accommodate deep slate profiles made it particularly suitable for this application.

Installation approach

The project required a full strip out of the existing roof. All salvageable Welsh slate was carefully recovered and reused across the main roof and adjoining wings. Where replacement was required, new slate was selected to match the original material in both appearance and durability.

Following removal of the existing covering, the timber structure was inspected and repaired where necessary.

Existing sound elements were retained to preserve as much of the original fabric as possible. On the boarded engine shed roof, a counter batten system was introduced to support drainage and airflow beneath the new covering.

Permavent Apex was installed in accordance with BS 5534 and BS 5250, providing a breathable and weather resistant underlay across the entire roof area. The integrated tape system allowed for consistent lap sealing, supporting installation during exposed weather conditions and ensuring a secure finish.

The roofing underlays vapour permeability removed the need for additional ventilation measures, allowing the original roofline to be preserved. This was a key requirement for maintaining the building’s historic character.

Permaflex was installed around the glazed skylight using its fully adhesive backing. Its flexibility allowed it to be formed neatly into position, creating a durable and watertight seal without the need for additional primers or fixings.

Performance outcomes

The completed roof provides a durable and weather resistant solution that supports the long-term performance of the building. The system delivers effective protection against water ingress while allowing moisture within the structure to dissipate, reducing the risk of condensation related issues.

The use of breathable and flexible materials has allowed the roof to perform in line with modern standards without altering the original design. This ensures the building remains both functional and historically accurate.

The project was shortlisted for Best Use of Slate on a Commercial Project at the Pitched Roof Awards 2025, recognising the quality of both the design and installation.

Heritage and regeneration impact

The restoration of Redcar Central Station demonstrates how traditional materials and modern roofing systems can be successfully combined. The project has brought a significant historic building back into use, creating a functional transport hub alongside retail and leisure space.

By retaining and reusing existing materials wherever possible, the development supports a more sustainable approach to construction while preserving the character of the original structure.

Conclusion

The Redcar Central Station project highlights the role of modern roofing membranes in supporting complex heritage refurbishments. Through the use of Permavent Apex and Permaflex, the project team delivered a roofing solution that meets current performance standards while respecting the building’s architectural significance.

The result is a well balanced outcome that combines durability, moisture control and ease of installation with the preservation of a key historic asset, ensuring the building can continue to serve the community for years to come.