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All photos by Sharrin Rees

Kenzai, Coogee

This residential project was a finalist in the 2017 International Green Interiors Awards residential category as well as the Sustainability Awards 2017 Single Dwelling Alterations/Additions category.

This has been our largest project to date and has allowed us to incorporate building system design, external material specification, landscape and even pool design into our practice. Our pride in the project is due to the fact that we have been able to pack the place with so many sustainable elements, which include :

• Recycled hardwood double-glazed windows

• Heat recovery ventilation units that ‘breathe’ for the house for healthy indoor environment and heat recovery of 90% in winter

• MgO board, lower embodied energy than fibre cement panels, used to clad the house. Insulation placed between the new cladding and original external walls.

• Window/door placement for cross-ventilation

• External shading of windows

• Exposed concrete flooring / ceilings / walls act as thermal mass (existing floor tiling and floating ceilings removed to expose concrete)

• Tiles with cradle-to-cradle accreditation by Mosa from Design Republic in all wet spaces – this means that Mosa tile production takes into account their full life cycle, optimising resource use, recyclability, renewable energy use, water efficiency and quality, and social responsibility

• Internal walls clad with EchoPanel, created from min. 60% recycled PET

• Surface-mounted sinks by Apaiser - made from crushed, recycled marble composite

• LED lighting throughout, re-use of light fittings

• Wool carpets

• Natural paints

• Sustainably sourced timbers used to clad internal ceilings / walls and some external walls

• 5kW solar array

• Existing pool converted to a 25,000 L water tank that feeds 3 internal toilets and all of garden needs

• Solar hot water

• Fridge housed in closed, ventilated cupboard, greatly reducing energy use

• Low energy appliances/low flow water fixtures throughout, re-use of water fixtures

• Recycled stone and timber used in garden