Your Home: Cold and Damp, or Warm and Dry?

As someone who was raised in Germany and now lives in New Zealand, I’ve got to say I love this videoclip!

Most of New Zealand’s houses have poor thermal performance. In winter, most of them are cold and damp. The remainder are warm but expensive to run. Ian Mayes says the problem is most Kiwis have not lived in warm, dry homes; poor quality homes have been normalised. It is so common, that  parts of the Census is dedicated to asking whether your home is cold and whether these is mould growing in it.

Thermo-Hygrometer: Modell HM 16We should all have thermo hygrometers in our homes. If everyone had one, there would be riots as people realise they are paying so much for cold, damp, poorly performing homes.

Ian Mayes, 2018

Making our homes warmer

Our homes can be made warmer by heating them well and reducing heat loss.

Heating

There are different ways we can heat out homes, and EECA has created a great resource to compare the options, depending on the size and use of the space you want to heat.

Reducing Heat Loss

Tips on insulating and reducing heat loss can be found in this blog post but here’s a little bit of extra info about my favourite topic – windows!

A single pane of glass only has an R-value of between 0.15 and 0.19. Standard double glazing is around R 0.26 and the fanciest double glazing might reach R 0.6.

Because even the best double glazed windows still have low insulating abilities, curtaining is very important.

The 4 rules for good curtaining are:

  • Cover ALL glass. Windows. Doors. Funny glazed spots. The lot.
  • Always 2+ layers. It is the air around and between layers that insulates, rather than the material itself. A single layer doesn’t trap nearly as much heat as a double layer.
  • Energy saving curtains should close off airflow over the window glass
    Image from http://www.green-energy-efficient-homes.com/energy-saving-curtains.html

    Stop reverse convection currents. By having curtains touching the floor, or  pelmets, or both!

  • Good behaviour. Close curtains in the afternoon, to stop daytime heat escaping. Open curtains in the morning to allow heat in during the day.

Making our homes drier

Ventilation and moisture control can help us make homes drier.

Note: Ventilation is different to draughts in that the former is a chosen air exchange, while draughts are uncontrolled air exchanges and heat leakages.

We want less moisture in our homes because it makes them healthier and less prone to mould. Good ventilation combined with other moisture control practices can reduce relative humidity.

Once again, EECA have created a great resource for tackling dampness and reducing indoor moisture, which can be found here: www.energywise.govt.nz/at-home/dampness.

 

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Urban Design: People, Places, Spaces

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Today, over half the world’s population live in urban areas. By 2050, it may be as high as 80%. Despite cities only occupying approximately 2% of the world’s land surface, they account for approximately 70% of global CO2 emissions, and this is only going to increase in the future.

In addition, spaces are designed for economic growth, rather than people: parks, playgrounds, community centres and dwellings are pushed out of the centre – to make space for businesses and parking lots.

(Full movie available here: https://vimeo.com/162029805)

Image: AcidFlask via flickr.  CC license: Attribution-NonCommercial-ShareAlike 2.0 Generic
Sustainable Cities Net http://www.sustainablecitiesnet.com/sustainable-cities/future-biodiversity-the-role-of-cities-and-local-authorities/

So how can we ensure cities and city developments keep people at their heart? And how can we make sure we look after the earth, and the other fauna and flora we share urban spaces with?

 

A Good Use Of Space…

Until recently, many urban designers were not aware that the way a city is designed determines how people behave, interact, and enjoy it.

A well designed city (or area within a city) will look different to everyone, but some key features are:

Elliott St has become more liveable thanks to Auckland Council's laneways programme.
Elliott St, Auckland  https://www.stuff.co.nz/business/better-business/78403950/laneways-inject-liveability-back-into-new-zealand-cities
  • Foster interconnectedness: there are many opportunities for people to meet and interact. Cul-de-sacs are great for dwellings as they do not have any through traffic, and are often relatively safe. Pedestrianisation of areas has also been found to radically change how people use a space; with more pedestianised areas resulting in more people coming out, walking, and socialising.
  • Foster well-being: there are opportunities to connect to nature, education centres, community services, and these are accessible to all.
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    Fostering interconnectedness and well-being.

    Working within the bioregion: ideally, urban and rural settlements within a bioregion will be self-sufficient, or almost. Bioregional self-sufficiency means the area will be more environmentally sustainable (for example it may have lower emissions, as less needs to be imported), it will have a vibrant local economy (as people will be supporting their local initiatives and businesses), and there will be a stronger identity (as each bioregion develops to suit its local area).

  • Make the most of available resources: good design turns ‘waste’ into resources, utilises horizontal and vertical space, and means features have more than one use (e.g. a living wall can produce food, help purify air, and provide insulation to buildings). Even space itself can be a resource; if buildings are arranged randomly, a lot of ‘lost space’ can exist, but with some care, space that can be used positively is found.

space

Aiming For Utopia…

After the industrial revolution, many cities became progressively less liveable; congestion, pollution, and unreliable supplies of resources meant many people suffered or lived in poor conditions.

There have been many ideas and movements to try and find solutions. Some have been somewhat successful, and others have resulted in additional challenges. One thing that has been discovered, is that there is no one-size-fits-all solution: to be effective, ideas need to be tailored to the local social, cultural, political and environmental circumstances.

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Ebenezer Howard is the founder of the garden city movement. As well as the links, this video offers an informative summary:

Though he and many others have attempted to solve city problems, those that forget to put people at the heart of design may find their ideas less successful.

For example, many past and present city planners like to zone the area they are working in. Zoning is the process of diving land into different zones and encouraging certain activities within each. While this may seem rational and make a place appear more organised, it is likely to be less practical for the people that live, work and play in the city.

zoning
In mixed use spaces, everything is much closer and convenient. Zoning can be a result of a disconnect between urban design and the people that use the space.

 

Image result for waimarama papakainga
Waimārama opens first papa kāinga

Bringing Back Papakāinga…

 

When New Zealand was colonised, traditional Māori settlements experienced extreme disruption and destruction. With traditional lifestyles threatened, many Māori migrated to growing cities and were made to live in culturally inappropriate houses.

Fortunately, there is now a growing movement to bring back papakāinga.

 

 

Introducing Jane Jacobs…

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Jane Jacobs was a writer and activist who was greatly influential in urban studies, sociology, and economics.

Her book The Death and Life of Great American Cities became one of the most influential American texts about the inner working and failings of cities, inspiring generations of urban planners and activists – Project for Public Spaces.

jane jacobs
From Project for Public Spaces

For example, in many cities, 90% of road space is for cars and 10% for people. However, 90% of the street population is pedestrians. So, it is time to stop catering for cars and start catering for people.

City Nature and Nature in Cities…

Ecosystem services are the services an ecosystem provides us for free, and include resources (e.g. raw materials), regulating services (e.g. air quality and pollution management), habitat services (e.g. maintenance of genetic diversity), and cultural services (e.g. tourism).

A healthy, sustainable city values ecosystem services and encourages biodiversity.

Urban areas are not only the living areas of humans, but fauna and flora as well.

– Bruce Clarkson, University of Waikato