Principle 3: Obtain a yeild
Baltic pine floorboards recovered from the original building were put aside for use in the two bedrooms. Baltic pine is quite soft, and damages easily, making it inappropriate for high traffic areas. I figured that I would have enough boards for both bedrooms as the boards covered two rooms about the same size and the original kitchen (now a study / 3rd bedroom). It turned out that it was a very close call with all useable boards used.
For the remainding rooms in the building we decided on recycled hardwood floorboards. The timber is a lot more durable, easier to work with and fairly cheap (at around $3.10 per lineal metre when bought in bulk). Being narrower though, 105mm instread of 150mm, they can take quite a while to install. Each room took about 16-20 hours to install (including insulation).
I planned to have insulation under the floor because of heat losses in winter of 10-20%, as well as heat gains in summer. The …