bbp france

11
European strawbale building methods 1. General information Evaluation of best building practices Method of construction: REGLES PRO ID: RP Architect Representative: Architecture BOHA Cédric Hamelin / Catherine Bouffière Contact: [email protected] Builders Representative: BATINATURE Mathieu Junique et Maël Steck Contact: [email protected] Table of Content 5. Explanation of the method 6. Calculation sheet 7. Questionnaire 8. Evaluation sheet Personal quotation In France, only infill straw bales in a bracing wooden frame structure can lead professionals to build legally. So we decided to prefabricate the building, which brings a high comfort of work and a protection against bad weather, building is very fast, and the straw is completely protected. Human being is not forgotten in our companies, very big industrialized machine are not use. Finally we privilege the local actors for all our supplies. 1. General information 2. Visual description of the method-1 3. Visual description of the method -2 4. Technical drawings 2D 1- General Date: 27/05/2011 Page 1

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Page 1: bbp france

European strawbale building methods

1. General information Evaluation of best building practices

Method of construction: REGLES PRO ID: RP

Architect Representative: Architecture BOHA Cédric Hamelin / Catherine Bouffière

Contact: [email protected]

Builders Representative: BATINATURE Mathieu Junique et Maël Steck

Contact: [email protected]

Table of Content

5. Explanation of the method

6. Calculation sheet

7. Questionnaire

8. Evaluation sheet

Personal quotation

In France, only infill straw bales in a bracing wooden frame structure can lead

professionals to build legally. So we decided to prefabricate the building, which

brings a high comfort of work and a protection against bad weather, building is

very fast, and the straw is completely protected. Human being is not forgotten

in our companies, very big industrialized machine are not use. Finally we

privilege the local actors for all our supplies.

1. General information

2. Visual description of the method-1

3. Visual description of the method -2

4. Technical drawings 2D

1- General Date: 27/05/2011 Page 1

Page 2: bbp france

European strawbale building methods

2. Visual description of the method-1 Evaluation of best building practices

3D – 1

Method of construction: REGLES PRO ID: RP

Architect Representative: Architecture BOHA Cédric Hamelin / Catherine Bouffière

Contact: [email protected]

Builders Representative: BATINATURE Mathieu Junique et Maël Steck

Contact: [email protected]

2-Visual 3D Date: 27/05/2011 Page 2

Page 3: bbp france

European strawbale building methods

3. Visual description of the method -2 Evaluation of best building practices

3D – 2

Method of construction: REGLES PRO ID: RP

Architect Representative: Architecture BOHA Cédric Hamelin / Catherine Bouffière

Contact: [email protected]

Builders Representative: BATINATURE Mathieu Junique et Maël Steck

Contact: [email protected]

3-Visual 3D_2 Date: 27/05/2011 Page 3

Page 4: bbp france

European strawbale building methods

4. Technical drawings 2D Evaluation of best building practices

Method of construction: REGLES PRO ID: RP

Architect Representative: Architecture BOHA Cédric Hamelin / Catherine Bouffière

Contact: [email protected]

Builders Representative: BATINATURE Mathieu Junique et Maël Steck

Contact: [email protected]

!!!!without scale!!!!

4- Visual 2D_2 Date: 27/05/2011 Page 4

Page 5: bbp france

European strawbale building methods

5. Explanation of the method Evaluation of best building practices

Method of construction: REGLES PRO ID: RP

Architect Representative: Architecture BOHA Cédric Hamelin / Catherine Bouffière

Contact: [email protected]

Builders Representative: BATINATURE Mathieu Junique et Maël Steck

Contact: [email protected]

Wooden frame structure construction

and implementation of the air barrier

the builders workshop

stone fondations first days, carrying the wall

fourth days,

implémentation of the

insulated roof

end of the Dojo

5- Explanation of the method Date: 27/05/2011 Page 5

Page 6: bbp france

European strawbale building methods

6. Calculation sheet Evaluation of best building practices

Method of construction: REGLES PRO ID: RP

Architect Representative: Architecture BOHA Cédric Hamelin / Catherine Bouffière

Contact: [email protected]

Builders Representative: BATINATURE Mathieu Junique et Maël Steck

Contact: [email protected]

Material amounts per choosen wall area of: m m

Total wall area 22.680 m² Wall length 4.200 Wall height 5.400 m

Total wall volume 10.886 m³ Wall thickness 0.480 m

Strawbales 10.886 m³

Wood 1.420 m³

Metal parts kg/m2

Costs of material and labour Calculated in subject to the conditions of the producing country

Total 236.30 €/m2

Labour

input/

wall area

Material

costs/wall

area

Labour costs/

wall area

Total costs/

wall area

workshop prefab 1.980 h 12 69 81 €/m2

lifting on building site

0.520 h 0 0 0 €/m2

OUTSIDE : cladding 1.486 h 40 52 92 €/m2

skirting 1.800 h 0 63 63 €/m2

[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

Page 7: bbp france

European strawbale building methods

7. Questionnaire Evaluation of best building practices

Method of construction: REGLES PRO ID: RP

Architect Representative: Architecture BOHA Cédric Hamelin / Catherine Bouffière

Contact: [email protected]

Builders Representative: BATINATURE Mathieu Junique et Maël Steck

Contact: [email protected]

1

2

3

4

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

cladding

3.4 How do you protect your wall during it’s construction from

weather?

All the walls and roof are build in prefab, few days are enough to

implement all. The bales are protected by boards.

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

The sill plate is risen on the both sides.

Bales

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 25 cm above the

ground3.2 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?

Fixation of balesHow are your bales secured in the wall?

compressed between the posts

Bales without gaps

How do you ensure tightness of the strawbale wall insulation (stuffing

gaps between bales with loose straw for example)?

Stuffing the gabs with loose straw

7- Questionnaire Date: 27/05/2011 Page 7

Page 8: bbp france

European strawbale building methods

7. Questionnaire Evaluation of best building practices

Method of construction: REGLES PRO ID: RP

Architect Representative: Architecture BOHA Cédric Hamelin / Catherine Bouffière

Contact: [email protected]

Builders Representative: BATINATURE Mathieu Junique et Maël Steck

Contact: [email protected]

5

6

7Fixing all the gaps and thanks air tightness layer.Fire resistance

How do you protect the walls from fire, while building and after? Do you

refer to official approvals?

Boards, we refer to official approvals.

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)?

the reeds are fixed on batten

Boards, others

Airtightness

What do you do to secure airtightness of the walls? Wall to ceiling,

opening or ground floor. Is there a blowerdoor test?

Wall coating

5.1 Plaster

How do you ensure bond of the plaster/render (if included in your wall’s

assembly) with the straw?

reeds

7- Questionnaire Date: 27/05/2011 Page 8

Page 9: bbp france

European strawbale building methods

8. Evaluation sheet Evaluation of best building practices

Method of construction: REGLES PRO ID: RP

Architect Representative: Architecture BOHA Cédric Hamelin / Catherine Bouffière

Contact: [email protected]

Builders Representative: BATINATURE Mathieu Junique et Maël Steck

Contact: [email protected]

Assessment value Present method Validation

Technical propertiesThermal behaviour

Thermal resistance R [K·m²/W] ≥ 5,7 [at λ=0,051] 7.29 ����

Fire behaviour

Fire resistance ≥ REI 30 boards ����

Moisture behaviour

Approved absence of mould [1], [2], [3] breazing walls ����

Sound insulation

Rw [dB] ≥ 44 not examined yet

Airtightness

Blowerdoortest passed n50 < 1,5 (air change at 50pa) 0.50 ����

Costs/ EffortLabour input [h/m²] < 15 5.79 ����

Labor costs [ EUR/m²] < 125 184.30 ����

Material costs [ EUR/m²] <125 52.00 ����

Total costs [EUR/m2] <250 EUR/m² 236.30 ����

Sustainability

CO2-Storage [Kg/m²] > 60 61.14 ����

PED nre [kWh/m²] < 100 61.21 ����

Wood usage [kg(m²]

Metal usage [kg/m²]

Professional executioningineering made by Batinature ����

wood calculation ����

wood assemblies in workshop ����

straw work in workshop ����

breazing layer in workshop ����

carrying walls ����

assemblies in site ����

tightness with water ����

tightness with air ����

Blowerdoortest passed ����

finishing ����

[1] visual examination of installed straw after years.

[2] Microbiological investigation in laboratory of installed straw

[3] General approval for mould absence

8- Evaluation Sheet Date: 27/05/2011 Page 9

Page 10: bbp france

All prices without taxes, calculated of the defined wall area of: 22.68 m²

Material Work

Amount Unit Price/Amount Total Mat/sqm Amount Unit

Heures

/m² Salary Price/Unit Total Work/sqm Mat+Work/sqm

EUR h EUR EUR EUR

Totals EUR/m³ 1 179.30 € 52.00 € 5.786 35 4 179.92 € 184.30 € 236.30 €

1 workshop prefab

9.07 m³ 30 272.10 € 12.00 € 22.68 m² 1.98 35 69.30 € 1 571.72 € 69.30 € 81.30 €

2 lifting on building

site

m³ 550 0.00 € 0.00 € 0 m³ 0.52 35 18.20 € 0.00 € 0.00 € 0.00 €

3 OUTSIDE : cladding

22.68 m² 40 907.20 € 40.00 € 22.68 m² 1.486 35 52.00 € 1 179.36 € 52.00 € 92.00 €

4 skirting 22.68 m² 0 0.00 € 0.00 € 22.68 m² 1.8 35 63.00 € 1 428.84 € 63.00 € 63.00 €

Page 11: bbp france

General

lengh of the wall 4.200 m

high of the wall 5.400 m

surface of the wall 22.680 m²

thickness of the wall 0.480 m

volume of the wall 10.886 m³

1 STRAW BALES 9.070 m³

2 WOOD

wooden frame 0.980 m3

wooden bracing

surface 18.000 m²

Volume of wood 0.160 m³

parement intérieure

batten 0.09 m3

skirting 0.22 m3

3 WOOD FIBER BOARDS

surface 5.14 m²

Volume 0.06 m3

TOTAL

TOTAL VOLUME OF WOOD 1.42 m3