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The good life

26/8/2021

8 Comments

 
PictureHampton House. Architecture: ZGA Studio. Photo: Tatjana Plitt
​By Zoe Geyer
 
LIVING in these pandemic-governed times has exemplified two extremes of the human paradox: the need for privacy, and the need to be part of something bigger (let’s call this our community).
 
Writing as I am from Victoria’s sixth lockdown, we are all too familiar with the craving for socialising, and to escape the confines of the house for a healthy dose of the outdoors. Cabin fever has set in but, exacerbated by the overdrive we find ourselves faced with in the ‘home’ environment: working simultaneously across multiple communication streams and platforms (mobiles, texts, emails, social media, Zoom, Teams, etc), children and home-schooling, isolation and constant adaptation to uncontrollable circumstances. The mental health impacts are widely discussed.

However, with a small confession that I am an architect, what I wish to focus on here is the idea of our ‘home’. More specifically, the idea of the ‘good life’ – and how our houses can make or break us.
 
A house can often be like a wedding dress; an homage to a different time and place, a romantic idea that projects our own fantastical identity and desires. I would argue there is nothing wrong with nostalgia now and then; however, if we base our houses on a nostalgic historical model – which in Australia, as in most colonised countries, is a transplanted model from the ‘home country’ that is poorly adapted to the new climate and rejects indigenous knowledge – we will not have the resilience or ability to adapt to the current let alone future climate that is just around the corner. We can trick up our nostalgic house, add bells and whistles, solar panels and batteries – but perhaps first we should take a look at what our house is all about.

​In 2017, Australia had the largest homes out of the countries surveyed. Australian homes measured, on average, 619 square metres, and were closely followed by US homes at 579 square metres. At the same time, households are getting smaller. In Australia in 1911, the average number of people per household was 4.5. By 2016, that number had fallen to 2.6.  So we’re now living in larger houses, with more internal space, and fewer humans.
Picture
Australia leads the world in average house size.
In Australia, our houses perform poorly and are readily termed ‘leaky’ buildings. The National Construction Codes  states “A building must have, to the degree necessary, a level of thermal performance to facilitate the efficient use of energy for artificial heating and cooling and a level of water use performance to facilitate the efficient use of water, appropriate to - … (f) the sealing of the building envelope against air leakage…” . However no requirement is stated. The Nationwide House Energy Rating Scheme (NatHERS) is a star rating system up to 10 stars, that rates the energy efficiency of a home based on design assumptions – and is not measured after it’s built. Victoria has a minimum six-star rating; however this only indicates good, not outstanding thermal performance.
 
Why does the thermal performance of our houses matter though? Consider this: we are living in bigger houses, with fewer people. These houses are leaky. And yet we still need a comfortable human environment inside. So we either wear jumpers and scarves (in winter) or nothing at all (in summer) to stay comfortable; or alternatively, put on the heater or air conditioning. And we are having to heat more and more internal space, which equates to more and more energy use, and more cost to the householder in bills; and essentially, an inefficient, costly and wasteful cycle.
 
In 2020, with my architect’s hat on, ZGA Studio became a signatory to the aims of Australian Architects Declare a Climate and Biodiversity Emergency: “meeting the needs of our society without breaching the earth’s ecological boundaries will demand a paradigm shift in our behaviour. Together with our clients, we will need to commission and design buildings, cities and infrastructures as indivisible components of a larger, constantly regenerating and self-sustaining system”.
 
With eyes wide open, in 2020 my architectural practice, ZGA Studio, became carbon neutral, and I also became a certified passive house designer. What is Passive House? Insulated, efficient, comfortable, ventilated buildings. Passive House buildings allow for energy savings of up to 90 per cent compared with typical existing buildings and over 75 per cent compared with average new best-practice constructions. Passive House buildings, when certified, are tested and measured after construction to get an actual performance ‘leak’ figure. This is a measure in Air Changes per Hour (ACH) – or how many times per hour the entire ‘inside air’ of the house leaks out (or vice versa). The maximum ‘leakage’ allowed by the Passive House Standard is 0.6 ACH. So each hour, the entire ‘inside air’ leaks out (or vice versa) less than once. In 2016 the CSIRO measured the Australian average ‘leakage’ of new houses as 15.4 ACH; so each hour, the entire ‘inside air’ leaks out (or vice versa) just over 15 times. Think of this as a nice warm comfortable inside air temperature having to be completely reheated every four minutes to stay constant. That’s a very inefficient use of energy.
 
In September 2019 Bass Coast Shire declared a climate emergency. The Bass Coast Climate Change Action Plan 2020-2030 was adopted this year with the target of zero emissions by 2030.  The greenhouse gas emissions in the Bass Coast equate to an average of 18.6 tonnes of CO2-e per person, every year. Stationary energy, which includes electricity, LPG bottled gas, mains gas and firewood, accounts for 39.8 per cent of that. This is one cost of our big, inefficient buildings.
 
As I see it, there are many steps we can take. Do we all need to live in tiny houses? Not necessarily – although it could be a great option for single-person households, or assisted living, or the ageing population, or those with less income. Could we live in smaller houses? Most definitely, yes. Could we live in more efficient houses? Absolutely essential. Could we live in innovative housing models, that are not only net zero carbon in use, but produce food, have next to no operational costs, and are healthy and connected to community? Yes please.

Zoe Geyer is a resident of Cape Woolamai, director of ZGA Studio, and co-ordinator of Totally Renewable Phillip Island. 
8 Comments
Beth Banks
27/8/2021 02:29:02 pm

The Victorian Govt is providing $25 million for affordable housing in BCS, Housing Matters a local Wonthaggi group want public housing with all the things you write about Zoe Geyer. We also want designers in BCS to provide such housing, We want builders to build such houses and we want the BCS youth to get jobs with these builders to learn the practice. We want the money to be spent in BCS. I believe we want you to lead the way and take all of us with you.Thank you

Reply
Barb Moje
27/8/2021 05:27:22 pm

Hi Beth Banks,
I am interested in joining this group. How do I find you? I have asked the Council for details but no reply! Could you dm me on FB? I am also an architect with an interest in Affordable Housing. (Not angling for projects just wanting to help with advocacy, my experience and contacts / network) Cheers Barb

Reply
Jessica Harrison
1/9/2021 11:51:01 am

Hi Barb, I have emailed you - will also contact you on Facebook. It will be good to have you on board !

Anne Heath Mennell
27/8/2021 03:11:35 pm

Everywhere I look there are houses being built up to the boundary with barely a hand's width between them and no outside space or garden. All of them would be leaky houses,I'm sure. The only alternatives are older houses (I love your wedding dress comparison) which are probably just as 'leaky'. If I need to move house, I don't have too many options. I look forward to reading your next instalment, Zoe, and hope you will share some helpful ideas.

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Sunny
27/8/2021 04:41:12 pm

Very interesting and well written article.So how many houses do you get from $25 million, and how is this going to solve the rising prices of the rental market? What I see in San Remo is mega houses being built at an alarming rate which do not look very energy efficient to me.

Reply
BARBARA MOJE
27/8/2021 05:15:33 pm

Go Zoe! Well written piece ! Looking forward to your next instalment! I would be interested to learn your opinion on retro fitting old leaky houses; can it be done to Passive House standard? Most people 'detonate' rather than renovate which is mostly presented as being cheaper, Yet, if I am to believe articles about research into retro-fitting, they all state that keeping an existing building is always more environmentally sustainable than building new. I wonder if a radical retro-fit to PH is easily done. (Maybe this could be another article? :)) Best wishes, Barb

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Yvonne McRae
28/8/2021 11:56:43 am

Everyone in their replies make excellent points (and Barbara not everyone is on facebook - not a leakage from houses but for many people a leaking of intelligence). perhaps contact Jessica Harrison for more info. on that Group. Anyone in doubt re the inappropriateness of house design and building for our rapidly heating world take a drive down McGibboneys Road or Fuller Road and see the plethora of McMansions - no eaves, no space around the house, no room for a shade tree, just a mini suburb. Surely let the BC Shire Council spend the millions on smaller houses for some of the vulnerable people in our community. Also make sure you contribute to the boxes on the Mitchell House verandah with non perishable groceries for those in our Community who are lucky to eat each day. Yvonne McRae

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Catherine Watson
6/9/2021 11:50:06 am

The day after Zoe's column was published, I was walking at Harmers and met a couple who had just moved into one of the new estates in north Wonthaggi. One of their comments: the new house was much bigger than their old house but didn't seem as convenient. "Not everything is in the right place."
Another comment: "You spend a lot of time walking from one room to another."
I'd call it "dumb space".
Look forward to more of Zoe's columns.

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