Environmental and energy balances of wood products and substitutes

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

 

 

Non-renewable energy

Renewable energy

(MJ)

(MJ)

Preliminary stage raw wood

32.18

197.97

Parquet production

64.73

-58.78

Packaging

4.5

0.11

Delivering

3.24

0.04

Laying

32.91

-1.65

Sealing

22.6

0.48

Renovation

54.7

1.05

Demolition

4.28

-44.37

Total

219.14

94.85

Energy consumption

313.99

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

 

 

Non-renewable energy

Renewable energy

(MJ)

(MJ)

Preliminary stage raw wood

44.32

224.34

Parquet production

136.95

-62.41

Packaging

3.99

5.49

Delivering

3.48

0.04

Laying

32.16

-1.55

Sealing

25.05

0.52

Renovation

27.35

0.52

Demolition

4.87

-43.42

Total

278.17

123.53

Energy consumption

401.70

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

 

 

Non-renewable energy

Renewable energy

(MJ)

(MJ)

Preliminary stage raw wood

110.05

197.97

Parquet production

99.21

-58.78

Packaging

5.63

0.11

Delivering

4.17

1.04

Laying

7.07

-1.65

Sealing

26.06

0.48

Renovation

26.83

1.05

Demolition

1.48

-44.37

Total

280.49

301.64

Energy consumption

582.13

 

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