Does embodied energy really matter in green building?

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Others come to similar conclusions; in one study, A comprehensive assessment of the life cycle energy demand of passive houses, the authors concluded that a family living in a Passive House, a very high standard that demands a lot of insulation, will, over the life of the house, only use a tiny bit less energy than those who live in a conventional house.

Like this author, they conclude that the only way to seriously reduce our life cycle energy cost is to live in smaller apartments downtown, but that is another slideshow.

But when you look at the list of materials in the passive house they studied (on TreeHugger here) you see it is full of 135 cubic meters of polyurethane foam insulation, sixty cubic meters of concrete, clay brick cladding and clay tile roof. There is a seriously high amount of embodied energy and carbon in this house.

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