Case Studies

Opting for Carbon Friendly Materials

How does a building reduce its embodied carbon emissions? This is what our partner, Investa, set out to achieve at 347 Kent Street in Sydney, Australia, as part of their overarching net zero carbon target (to reduce the embodied carbon emissions intensity by 50% below their reference standards by 2040).

Embodied carbon considers the carbon footprint of materials throughout the supply chain, the very materials that make up our buildings. With 347 Kent St positioned for re-development, it was a perfect opportunity to determine potential embodied carbon emissions reductions by comparing typical materials used with that of carbon friendly alternatives.

The goal – Align with the first stage of the net zero target and reduce embodied carbon emissions by 15%.

The result – 17% reduction (~2,040 tonnes of avoided CO2 equivalent), a savings that exceeds the building's pre-refurbished annual operations scope 1 & 2 carbon emissions (~1,903 tonnes CO2e).

Some of the key initiatives that contributed to this outcome include the re-use of ceiling grid (which had initially been programmed for demolition and disposal at the project's outset); the adoption of 30-40% fly-ash replacement concrete mix; 100% second hand formwork; recycled content re-bar; re-purposed steel temporary structures; and retaining the heritage façade.