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European strawbale building methods 1. General information

Method of construction: Representative: Contact:

Post and Beam

Evaluation of best building practices

ID: PB-01

Peter Vos, Belgium architectengroep barchi bvba, Tikkelsteeg 11 3770 Riemst Tel +32 12 / 39 50 28, info@barchi.be, www.barchi.be

Personal quotation ....we built with this method already 10 years...

Table of Content 1. General information 2. Visual description of the method-1 3. Visual description of the method -2 4. Technical drawings 2D 5. Explanation of the method 6. Calculation sheet 7. Questionnaire 9. Evaluation sheet

1- General

Date: 27/05/2011

Page 1


European strawbale building methods 2. Visual description of the method-1

Evaluation of best building practices 3D – 1

Method of construction: Representative: Contact:

2-Visual 3D

Post and Beam

ID: PB-01

Peter Vos, Belgium architectengroep barchi bvba, Tikkelsteeg 11 3770 Riemst Tel +32 12 / 39 50 28, info@barchi.be, www.barchi.be

Date: 27/05/2011

Page 2


European strawbale building methods 3. Visual description of the method -2

Evaluation of best building practices 3D – 2

Method of construction: Representative: Contact:

3-Visual 3D_2

Post and Beam

ID: PB-01

Peter Vos, Belgium architectengroep barchi bvba, Tikkelsteeg 11 3770 Riemst Tel +32 12 / 39 50 28, info@barchi.be, www.barchi.be

Date: 27/05/2011

Page 3


European strawbale building methods 4. Technical drawings 2D Method of construction: Representative: Contact:

Evaluation of best building practices

Post and Beam

ID: PB-01

Peter Vos, Belgium architectengroep barchi bvba, Tikkelsteeg 11 3770 Riemst Tel +32 12 / 39 50 28, info@barchi.be, www.barchi.be

!!!!without scale!!!! 4- Visual 2D_2

Date: 27/05/2011

Page 4


European strawbale building methods 5. Explanation of the method Method of construction: Representative: Contact:

Concrete foundations

Evaluation of best building practices

Post and Beam

ID: PB-01

Peter Vos, Belgium architectengroep barchi bvba, Tikkelsteeg 11 3770 Riemst Tel +32 12 / 39 50 28, info@barchi.be, www.barchi.be

Post and beam construction including roof and floors

Compressing strawbales

Preparation of plastering Covering of wooden

between the vertical posts

parts with reed at the outside and jute mesh inside

Exterior lime plaster by

Interior earth plaster directly on

machine directly on the

the strawbales

strawbales

5- Explanation of the method

Date: 27/05/2011

Page 5


European strawbale building methods 6. Calculation sheet

Evaluation of best building practices

Method of construction:

Post and Beam

Representative: Contact:

ID: PB-01

Peter Vos, Belgium architectengroep barchi bvba, Tikkelsteeg 11 3770 Riemst Tel +32 12 / 39 50 28, info@barchi.be, www.barchi.be

Material amounts per choosen wall area of: Total wall area Total wall volume Strawbales Wood Laminated timber Regular timber Metal parts

21.378 7.696 7.696 0.931 0.366 0.564

m Wall length 4.200

m² m³ m³ m³ m³ m³ kg/m2

Wall height Wall thickness

m 5.090 m 0.360 m

Costs of material and labour Total

Straw bales, everything included Wood: Posts and beams, everything included Outside complete: Limeplaster Inside complete: Clayplaster

Calculated in subject to the conditions of the producing country 184.47 €/m2 Labour Material Labour costs/ Total costs/ input/ costs/wall wall area wall area wall area area 0.400 h

11

14

25 €/m2

9.000 h 1.486 h 1.143 h

24 30 0

14 52 40

38 €/m2 82 €/m2 40 €/m2

Costs of material and labour 200 40

Inside complete: Clayplaster

40

82

Outside complete: Limeplaster

52

38 25

Wood: Posts and beams, everything included

EUR/m²

150 100 50 0

0 30 24 11

14 14

Straw bales, everything included

Material costs/wall Labour costs/ wall area area

Total costs/ wall area

[1] Material costs for metal parts and screws etc. included in Labour costs [2] Material costs for metal parts and screws etc. included in material costs

6- Calculations

Date: 27/05/2011

Page 6


European strawbale building methods 7. Questionnaire

Evaluation of best building practices

Method of construction: Representative: Contact:

1

Post and Beam

ID: PB-01

Peter Vos, Belgium architectengroep barchi bvba, Tikkelsteeg 11 3770 Riemst Tel +32 12 / 39 50 28, info@barchi.be, www.barchi.be

Fixation of bales How are your bales secured in the wall? Vertical and horizontal compression of the bales with post and beams. Hazel

2

pins to fix the bales

Bales without gaps

How do you ensure tightness of the strawbale wall insulation (stuffing gaps between bales with loose straw for example)?

3

Stuffing the gabs with loose straw

Moisture

3.1 How do you deal with potential of rain bouncing from the ground surface and ground humidity? Bottom of the first row of bales is lifted minimum 15 cm above the ground

3.2 How do you deal with possibility of water intrusion from building’s interior at each floor level? Irrelevant

3.3 How do you protect straw in your walls against wind driven rain? With 3 layers of trasskalk

3.4 How do you protect your wall during it’s construction from weather? First we build the wooden structure with the roof. Before infilling het construction with bales, we protect the whole construction from the outside. The bales are placed from inside

3.5 How do you prevend water leakage at the window sill detail?

4

Bales What are your criteria of bale quality (shape, density, moisture content…)? Give the borderline values. Humidity < 15% / density 90-120 kg/m3 / bales : 450/350/900mm

7- Questionnaire

Date: 27/05/2011

Page 7


European strawbale building methods 7. Questionnaire Method of construction: Representative: Contact:

5

Evaluation of best building practices

Post and Beam

ID: PB-01

Peter Vos, Belgium architectengroep barchi bvba, Tikkelsteeg 11 3770 Riemst Tel +32 12 / 39 50 28, info@barchi.be, www.barchi.be

Wall coating 5.1 Plaster How do you ensure bond of the plaster/render (if included in your wall’s assembly) with the straw? 3 layers of limeplaster with net

How do you ensure that your plaster/render (if included in your wall’s assembly) doesn’t crack over connection of two different supporting materials (for example timber-straw connection)? Bamboonets overlapping at least 200mm over to each side

Boards, others

6 Airtightness What do you do to secure airtightness of the walls? Wall to ceiling, opening or ground floor. Is there a blowerdoor test? Fixing all the gaps, blower door test is planed in future

7 Fire resistance

How do you protect the walls from fire, while building and after? Do you refer to official approvals? Yes

7- Questionnaire

Date: 27/05/2011

Page 8


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