WorldGBC Advancing Net Zero Status Report 2022 Triton Square, London ircular approach to decarbonisation Client: British Land ontractor: Lendlease Architect: Arup Refurbishment of 1 Triton Square, a 1990s office building in London owned by British Land (BL), in collaboration with Lendlease and Arup, is a lesson in the power of searching for every possible source of carbon savings. The project has saved approximately 40,000 tCO 2 e over the course of a 20-year lease term — the equivalent carbon to heat and power approximately 9,900 average UK houses for a year, and a 48% reduction compared to BL’s office benchmark. The project had a strong commitment to embodied carbon from the start, which was brought to life during design and construction by a team of like- minded professionals working together towards the project’s sustainability vision. Innovative circular economy principles were applied to retain and reuse as much of the existing frame and façade as possible. This resulted in a saving of 3,300m 2 of limestone, 33,400 tonnes of concrete and 1,843 tonnes of steel despite the net area of the building doubling in size. - The team also sourced materials from other demolished buildings, including 2,800 sqm of paving and other roof coverings - Low energy lighting, heat recovery systems, upcycling redundant plant - Carbon fibre column strengthening allows up to 40% increase in axial load capacity with no impact on area - 30% reduction in piling using piled raft compared with piles and pile caps -● The stair cores are positioned outside of the building’s thermal line - Conducted lifecycle carbon analysis on several different products and materials in-house - 59% cement replacement with 41% less carbon than standard concrete - Over 99% of construction waste was diverted from landfills - BREEAM ‘Outstanding’ score of 92.3%, beyond contractual obligation rating of ‘Excellent’ The following interventions stem from collaborative efforts between British Land, Arup and Lendlease. By working together at all stages of the project they were able to maximise the reduction of emissions, waste and recycling of materials, to deliver each aspect of the building and overall environment. - Pioneering one of the UK’s first large-scale circular façades – 3500m 2 of panels were removed and then transported to a pop-up facility less than 30 miles away for refurbishment. The result is Arup, Lendlease and British Land’s first true circular economy façade that saved over 19,000 tonnes of carbon and represents a 66% cost saving when compared to the construction of a new façade. To support the project’s whole life carbon and sustainability assessments, Lendlease Sustainability Manager, Anastasios Skitzis, worked with commercial and package managers to engage with the supply chain during procurement to identify whether suppliers had sufficient responsible sourcing certification and Environmental Product Declarations (EPDs) for their products. Most importantly, when EPDs for products they wished to use weren’t available, as was the case for some SMEs (Small and Medium-sized Enterprises), the Triton Team supported these suppliers to create them. Read more here. PAGE 39
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