CONTEXT 182 : DECEMBER 2024 31 HEATING & VENTILATION environment for leisure and public enjoyment. The building will feature spaces dedicated to food and beverage, heritage interpretation and stories of the building and its seaside setting, and flexible areas for community and cultural events, with the potential for larger gatherings. The refurbishment will adhere to high conservation standards, ensuring that the historic cast- and wrought-iron frame is carefully restored, with high-quality materials for new timber screens and glazing. The proposed scheme includes the addition of a first-floor gallery, offering new perspectives both inside and outside the building. Space will be allocated for performances and events. The ground-floor Tower area will host the majority of these, while a galleried viewing area in the round will be situated on the first floor. A ‘hellerup’ stair will serve as informal public seating while providing a connection between floors. The Nave will host a seating area and an enclosed kitchen on the ground floor, with a lounge/bar area on the first floor. The restored frame, paired with contemporary interventions, is designed to create a calm backdrop for planting and flexible public spaces. The historic cast- and wrought-iron structure will be repainted in its original off-white, with upgraded timber frames and glazing. New materials such as timber, terracotta and terrazzo will complement the historic elements. The reconstructed extensions flanking the historic entrance hall will be set back, with their scale reduced and footprints matched to ensure the restoration of the building’s original symmetry. Glazed doors will be reintroduced to highlight the east-west axis, offering clear sightlines through the building to the beach and sea. New external landscaping will re-establish the Winter Gardens as a prominent landmark on Great Yarmouth’s Golden Mile. Lean, mean, green The challenges presented by a Grade II*-listed Victorian glasshouse require a delicate balance between heritage preservation, the impact on the existing structure, aesthetics, practicality and environmental performance. The building is essentially a large glasshouse. The project aims to achieve net zero carbon in operation, with the low-carbon interventions showcasing innovative sustainability measures for public education. The energy strategy will follow the ‘lean, mean, green’ principles of energy conservation. A key to this approach is restoring the Victorian method of natural ventilation, utilising high- and low-level openings to regulate airflow. Six-metre-diameter stratification ceiling fans will help to maintain a comfortable environment. These will be powered by a small solar photo-voltaic array on the unglazed roof sections. Internal shading systems will mitigate extreme solar gain in the summer and trap heat within the building in winter. Air-source heat‑pumps providing low-carbon heat will produce energy-efficient heating using refrigerants that have no long-term impacts on the environment. Low-flow sanitaryware will reduce hot and cold water demands. Rainwater harvesting mitigations will include a buried 100,000-litre collection tank below the south services block, feeding into the irrigation system and serving the flushing of toilets. The original design and construction of the Winter Gardens exemplifies the nineteenthcentury approach to glasshouses: a celebration of iron and glass to create a palace of marvels. These buildings, while spectacular, were designed as if energy would always be cheap, and the idea of carbon budgets was unknown. As originally designed, the great glasshouses are among the least sustainable constructions imaginable. The latest technologies will be used to rebuild the Winter Gardens as a demonstration of climate adaptation. A key part of this has been reimagining the plant displays to provide exotic and spectacular planting, but in a subtropical environment with a winter minimum temperature of 10°C. Performance measures are not based on the scientific value of the plant collection but on what impresses and inspires the guest, provides opportunities to discuss sustainability from a home, town and global perspective, and encourages repeat visits. Biodiversity will be enhanced through a planting scheme that integrates endemic species and Victorian-era planting with local and drought-tolerant plants, as well as native species from countries around the world linked to Great Yarmouth’s former trading routes. Peat-free soil and pesticide-free treatment will support the internal biodiversity net gain while contributing to the building’s climate resilience. The planting plan will create an exotic space to catch guests’ imaginations with emphasis on colour and spectacular growth forms. The planting will include palm trees, giant bananas, orchids, greenwalls and smaller species, including desert succulents. To provide all-year interest, the framework planting will be supplemented with seasonal temporary plants that celebrate harvest and seasonality, such as spring flowers, a chilli festival or a home-gardening event. It is important that the venue changes with the seasons and becomes part of a family’s annual holiday plans and a regular destination. The new Great Yarmouth Winter Gardens will not be a botanic garden, rather a spectacular public garden creating an inspiring environment. Faye Davies is a specialist conservation architect and managing director of Burrell Foley Fischer, architects for the restoration of the Winter Gardens. Lawrence Williamson is a senior mechanical engineer at Buro Happold, building services engineers and sustainability consultants for the Winter Gardens restoration.
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