Weiti Care at Gulf Rise

Sustainability was front of mind when Metlifecare drew up plans for a dynamic care home at its Gulf Rise retirement village.

ow Weiti Care is the first care facility in Aotearoa to achieve a 6 Green Star Design certification. Showcasing what sustainability can look like in the context of a high-dependency residential unit, Weiti Care delivers on a range of challenges, from indoor environment quality, wellness and peacefulness to energy outcomes and life cycle impacts.

The cutting-edge building will be seen as a catalyst for change in the retirement sector. A three-storey, 2230m2 residential aged care facility comprising 13 ground floor dementia care suites and 23 rest home and hospital-level care suites (suite size is 23-36m2).

The development features a secure memory garden for dementia residents; 25 staff will work at Weiti. The development is scheduled for completion in 2026 (209 independent living units/ 36 care suites).

The street layout of Gulf Rise retirement village merges with the neighbourhood's existing street network - breaking down the stereotype of a gated, isolated retirement complex.

Metlifecare said its 6 Green Star design certification for Weiti Care is a key moment in its state-ofthe-art Gulf Rise retirement village development and a fantastic yardstick for the future.

"We want to be a transformative industry leader in sustainability and a force for positive impact. Reducing our environmental footprint when we build villages is a key part of our sustainability focus," said Metlifecare's Head of Delivery, Michael Lisowski.

"We are thrilled to have received our first 6 Green Star design certification for Weiti Care. The achievement marks a significant milestone for Gulf Rise and sets the benchmark for our future care homes to reach the same world-leading ratings."

Earl Gasparich, Head of Delivery

Michael Lisowski, NZGBC Senior Manager Buildings and Communities

Brad Crowley

Metlifecare has underpinned plans for those future care homes - a pipeline of six 6 Green Star rated high dependency facilities (referred to as the 6X6 project) - with its forward-thinking approach to funding green buildings.

With Weiti Care as its prototype, Metlifecare has aligned its 6X6 project target with a $1.25 billion dollar Sustainability Linked Loan (SLL).

"Metlifecare has completed a refinancing of its bank loan facilities into Sustainability Linked Loan facilities which are tied to three key social and environmental goals. If we achieve the KPI targets, a lower interest rate will apply. One such KPI is building six new aged care facilities within five years - which will achieve 6 Green Star ratings. In short, we're putting our money where our mouth is."

He said Weiti Care is a ground-breaking building driven by a highly-considered and sustainable design approach.

Lisowski hopes it will exemplify how the retirement sector can and should build its future aged-care facilities.

“I absolutely love this unique building with the innovation that conceived it and the biophilic design embedded in it. This project was intended to be built smarter, faster, safer, quieter and more efficiently than traditional construction.”

Lisowski said its smart, cost-effective construction had been propelled by a number of off-site manufacturing initiatives, including:

• ensuite bathroom pods pre-manufactured to the exact size and fully complete with second fixings

• cross-laminated timber structural componentry pre-cut off-site and pre-drilled (down to 50 mm)

• panels of exterior façade/cladding manufactured off-site (then clipped onto the building)

• pre-built reinforcement cages for concrete foundations

He said these prefabricated elements have dramatically driven down the amount of waste on-site, reduced on-site activity and labour, and promoted a healthy work environment.

“As important as speed and efficiency, the construction of this project is much quieter than conventional builds, which is important to the quality of life for our residents living several meters away.”

Michael said the building’s design has significantly impacted its life cycle assessment (LCA), which demonstrates a reduction against six environmental impact categories compared to a standard-practice reference building.

“Our life cycle assessment shows that going forward, Weiti Care will be highly efficient and highly economical to run. At the same time, it will provide a beautiful environment for our residents,” he said.

Metlifecare said Green Star had been a perfect fit for the Weiti project.

“It started with us thinking about the people who would be living and working in the building. Weiti Care will be the last home for most of the building’s residents; therefore, we felt we should create a facility that maximises comfort with the best air quality, lighting and sound attenuation for those residents and the staff caring for them. The Green Star tool was a natural choice when we set our quality of life and sustainability goals,” said Lisowski.

Initially, the tool was used as a tickbox exercise for the project’s 6 Green Star goals. Still, as time went by, he says it became an inspiration for placing a wider lens across sustainability and innovation.

“Green Star provided an opportunity to explore our design principles to address the needs of our aged care residents. It gave us a way of looking inwards and asking ourselves, ‘How can we strive for excellence?’”

GSAP David Fullbrook, founder and senior consultant at eCubed, said Metlifecare is breaking the mould with its approach.

“Targeting the highest standard of sustainability on a multiple care building programme and linking that to a very large sustainability backed loan - a new financial funding instrument - involves challenging and reimagining the status quo. It feels like the future and how we might do things differently,” he said.

The key sustainable features of Weiti include:

• use of CLT cross-laminated timber structure and prefabrication

• thermally efficient building envelope – higher than new code requirements

• heat recovery ventilation linked to Covid 19 Response

• 50 kW solar PV array

“All these features are linked around the overarching principle in a climate emergency to reduce both embodied and operational carbon,” he said.

A strong advocate of life cycle assessments, Fullbrook said the quantitative technique (used to calculate the potential environmental impact of a building's material, energy and water consumption over its full 60+ year life cycle) is a new language and skillset to learn.

“We have committed to doing full LCA for all our Green Star projects. A life cycle assessment is like an autobiography of a building. It lets you see the upstream impact of the materials used in a building.

We hope LCA will foster a greater reverence by designers for how they select materials and that the widespread use of EPDs (environmental product declarations) will also help designers in their decision-making.”

Fullbrook said aged care facilities are not a building type that has received much attention, and he hopes the industry will sit up and take notice of the project.

He believes there are fantastic opportunities to build better in the retirement sector and to make a difference in people’s later life.

Designing and building better has been central for Enovate Consultants as part of its response to the Weiti development.

Director Dr Michael Newcombe said the project’s 6 Green Star goal greatly influenced its engineering solutions which include:

• The entire structure maximises engineered timber and cross-laminated timber rather than a more traditional concrete/steel structure. (Engineered timber and CLT sequesters carbon within a building for decades resulting in a low-embodied carbon development)

• Minimising carbon-intensive concrete and steel in the building’s foundations through the use of a lightweight superstructure

• The structure is designed to be seismically resilient - which minimises waste and/or avoids demolition in the event of a large earthquake and is designed to be readily reusable/demountable

There were unique considerations for high dependency and dementia residents.

“International research has demonstrated that the use of natural materials, and timber in particular, can have a calming effect on occupants - enhancing wellbeing,” said Dr Newcombe.

He said the project’s 6 Green Star achievement comes as no surprise given Metlifecare’s leadership in the sustainability and lowembodied carbon space.

“We greatly appreciate its foresight and the opportunities it has provided to design structures we are proud of as we step into a lowcarbon future.”

Meanwhile, Michael Lisowski of Metlifecare said enhancing the wellbeing and happiness of future residents and staff through sustainability has spearheaded the Weiti Care Home project and its outcomes.

“We have packed so much into this unique building, and one of the most significant benefits of earning a Greenstar rating is that when we lead, we can inspire. I hope to see our peers pushing for Green Star ratings because the more our industry utilises sustainable design - the more we can influence the future.” considerations for high dependency and dementia residents.

In addition to its 6X6 project, Metlifecare is pushing towards 7 Homestar ratings for many of its apartments and villas.