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

 

Related Posts

Pieces of salada crisp bread, broken up and stacked up

SALADA

I have been a scout leader for more than a decade now and one of the things we learnt and what we try and teach the kids is SALADA. This is an acronym for “Stop Assess Listen Allocate Do Assess again”. It is also symbolised by a piece of the brand salada crisp bread that you try and stuff into your mouth in one big piece – which does hardly work – without pain that is. So the lesson from this is also that you need to break it down into chunks to eat it. Just like you have to break down your task into manageable chunks to do them. This aligns with the “Allocate” in SALADA, ie break it up and give your team members jobs.

COP26 – Just another talk? Up to you!

It’s that time of the year again – ground hog day – another global leader meeting to tackle climate change. Or to talk about tackling climate change.
Do whatever you can – at home or work, in your job, in your projects.
It’s up to you, not anyone else.

Horrible Hybrids – A reminder

Michael Braungart and William McDonough called them “horrible hybrids” in their 2002 book “Crade to Cradle”. Things that are fused together from different materials that cannot be separated and thus not recycled.

Soybeans in a supermarket in China

What to eat those days?

Being married to a vegetarian and not cooking extra at home, the family tend to eat vegetarian – with lots of soy products. So this post is more of a collection of thoughts around soy products. And yet again there’s confusing information out there. The general perception is that soy is good for you: Non-animal, vegan, high in protein, etc.

But then you do a bit of research and googling and find quite contradicting information as well.

Kiwibuilds 100,000 homes progress

The average build numbers according to my article published in 2018 would have been ~30,000 homes by now. The actual stats are somewhat lower than that: 934 – yes: 934. Even if we would say that starting up is hard and the initial output would have been lower, would we maybe not have expected 20,000 homes? But we got 934.

Leave a Reply