Appendices

Appendix 1: Description of "normal level"

1. According to Kroth et al. (1991) the total wood consumption in the conventional single-family houses in Germany amounts to 35 m³/1000 m³ space volume. The share of solid wood is 95 percent and that of wood-based panels 5 percent. The volume of 35 m³ corresponds to 31 m³ or 13.3 tonnes of oven-dry wood.

2. The space volume has been described by DIN 277/May 1973 and specifies the total volume of house above the ground including walls, ceilings and roof.

3. Based on data given by UN/ECE (1996), the average dimensions of houses in Central Europe are as follows:

• Length: 12 m
• Width: 7 m
• Height of ground floor: 2.75 m
• Height of roof : 4.0 m

4. The single-family brick house dealt with in this study consists of two floors (see Table 4) showing a layout of 136.2 m². The height of the second floor is assumed to be 2.75 m. The space volume calculated according to DIN 277 amounts to 479 m³.

5. The amount of wood used in the brick house is calculated as 13.3 m³ x 0.479 tonnes/m³ = 6.4 tonnes which can be specified as normal level.

6. In Table 4 the real input of wood is 6.5 tonnes which varies less than 2 percent from 6.4 tonnes and can be considered as normal level.

Appendix 2: Energy consumption for mosaic solid parquet, glued

Appendix 3: Energy consumption for a two-layer prefabricated parquet, glued

Appendix 4: Energy consumption for a three-layer prefabricated parquet, glued