Plan for house building - requirements specifications

From the first idea over the requirements specifications and how this develops to constructions plans. The development of my second plus energy house.
Water film lets slide the snow Water film lets slide the snow
  80 minutes after I was car driving, all the snow from the front of the roof had slid to the windshield. The warmth from the interior room has melted a thin layer of snow..


Planning an one family house Planning an one family house
  I started 2004 with the requirements specifications for the planned construction. One year later how the requirements specifications develops to plans.