I do the decent and go out and make a pot of tea and heat up a few muffins. I become lost in thought. Say a simple 10sq m room costs $500 a meter to build. Good insulation cuts its annual $800 heating bill to $200 and holey insulation costs me $300. Over 16 years those holes cost more than the original cost of the room.

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Chapter Three - A Holey Pilgrimage-Holey  Walls.        

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