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what are the most energy efficeint materials when building a house?

i am doin a school project and would like to no what the best materials for building a houde are when you want to keep the house warm in the winter and cold in the summer... also what roofing materials are best and insulation

Public Comments

  1. Hay bales. There are homes actually made of this and are very energy efficient. Google it and you will see.
  2. A below ground level house is the easiest to heat and cool. The ground stays aproximately the same temperature year around below a certain depth, so heating or cooling is relatively inexpensive. http://money.cnn.com/2005/03/09/real_estate/buying_selling/undergroundliving/index.htm A conventional house would be one: Built facing a certain direction, with correctly placed doors and windows: http://climatechangeaction.blogspot.com/2005/09/energy-efficiency-vs-small-scale.html Built using radiant barrier foil insullation: http://www.energyconservationspecialists.com/?source=easyppc Energy efficient lighting: http://www.djc.com/news/en/11132993.html And would be a "green" choice way: http://inhabitat.com/blog/2006/08/09/green-building-101-energy-atmosphere-part-1/ Hope this helps you. ...jj