Building houses in Canada's high arctic makes life better for people in the UK
Canada's building research community has learned how to construct houses in the high arctic and applies those lessons to Super E® houses constructed in the UK. Although the problems associated with arctic housing continue to challenge Canadian builders, the real breakthrough was made over thirty years ago, much farther south.
In the late 1970s, the Saskatchewan Conservation House was built in Regina, in the western prairie province of Saskatchewan. It's not the arctic, but it can feel like the arctic in the winter. The Conservation House was the beginning of the development of a systematic approach known as house-as-a-system. The uniquely Canadian idea that if you change something in a house, it has an impact on the rest of the house.
For example, to conserve energy, houses need to stop leaking warm air. If you make a house more airtight, you create two problems: the people inside the house get sick; and, the buildings deteriorate because there's no way to shed moisture originating from inside the house. Both problems are solved by whole-house mechanical ventilation.
Keeping houses warm is certainly a high priority in the arctic. But it's not the only housing issue:
Most of the arctic is muskeg: Somewhat akin to frozen bog, when permanently frozen muskeg starts to melt from heat generated by the house, the foundation sinks. The problem is, it doesn't sink evenly.
There are no power services: Who would build a generating station to serve the 73,000 people who live in 3.1 million square kilometres of arctic? If you turn on a light in Resolute Bay, the electricity is coming from a diesel generator. The diesel fuel has to be flown in.
There are no people: Getting stuff to the arctic is expensive, and there's no possible economies of scale. The arctic is the size of Europe with a population smaller than Chester.
There are no roads: That means no way to truck building materials to the job site. If you need steel, timber, windows, plumbing fixtures, in fact anything, you have to fly it in, because you can't use ships either.
Most planes are small: The courage and tenacity of Canada's legendary "bush pilots" is world-famous. The thing about bush pilots is they fly small airplanes. So small, many do not have pressurized cargo compartments. This is very unhealthy for high performance windows which relay on a sealed spaced between glazings. Glazings crack at high altitudes.
Water and sewage: When it's minus 55 all week, it's pretty obvious there's not going to be a whole lot of water flowing through pipes. What's less obvious is how you're going to get rid of waste water generated in the house. By the way, forget about septic tanks in the arctic.
Given all these factors, it's no wonder Canadians are at the leading edge of off-grid housing design, where houses
are built to be self-sufficent — in energy and water. It's the first step in building zero carbon homes, now a priority
for the UK. |