SCC Art Gallery Roof

At the heart of Southampton’s Civic Centre sits the Grade II listed Southampton City Art Gallery, home to one of the UK’s most valuable art collections, encompassing more than 5,300 works across six centuries of European art. Maintaining the building’s performance, resilience, and environmental control was essential to both the protection of this heritage collection and its continued public enjoyment.

Over time, it became apparent that the West Wing of the Gallery could no longer provide the stable, controlled environment required for museum‑standard artwork. The existing mastic asphalt roof coverings and rooflights had reached the end of their serviceable life, leaving the collection increasingly vulnerable and exposed to risk.

At the same time, the roof‑mounted air‑conditioning plant had become obsolete. Restricted access, physical deterioration, and an unsuitable layout meant the system could not be effectively maintained or upgraded in isolation, while its performance no longer met conservation standards. Following a detailed assessment of potential remediation options, it was concluded that a coordinated, wholesale roof replacement represented the most viable, sustainable, and appropriate long‑term solution for the building.

As such, the project delivered a comprehensive programme of roofing, mechanical, and associated refurbishment works, including:

• Strip and renewal of mastic asphalt roofing across ten roof areas of varying size and configuration
• Insulation upgrades, replacement rooflights, and renewal of associated drainage systems
• Removal of existing roof‑mounted air‑conditioning plant and installation of new mechanical systems to achieve museum‑grade environmental standards
• Upgrades to roof access infrastructure and glazing to the existing crittal windows
• Replacement of the main gallery security shutter
• Internal redecoration to any affected area
• Extensive temporary works, including scaffolding and temporary weather protection

As a Grade II listed building, the works within the Art Gallery required a highly sensitive and carefully controlled approach to safeguard its historic fabric while accommodating complex construction activity. Firstly, conservation considerations were woven into every stage of planning, sequencing, and methodology development. All heritage‑related approvals and technical queries were carefully managed through the client’s Project Manager and Architectural Technician, who acted as the formal liaison with the Conservation Officer.

A key principle of the approach was to avoid intrusive works wherever possible. Where fixings into historic stone were unavoidable, works were undertaken under tightly controlled conditions and fully reinstated by a qualified stonemason, ensuring original materials, detailing, and appearance were preserved.

This was exemplified within the main gallery, where the installation of a new security shutter required the temporary removal of existing stone cladding. Each stone was meticulously dismantled, individually numbered, and securely stored, allowing for precise reinstatement on completion and ensuring the gallery’s original character and appearance were fully retained.