bbp slovakia
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European strawbale building methods Best building practice, by Boris Hochel, ozartur.skTRANSCRIPT
European strawbale building methods
Leonardo da Vinci_PARTNERSHIPS 2009/2011_STRAWBALE BEST BUILDING PRACTICE IN EUROPE
1. General information
Method of construction: Post and Beam (wrap ID: PB-‐02Representative: Boris Hochel
Contact: [email protected] www.ozartur.sk
Table of Content
Personal quotationFirst SB method with official building permition in Slovakia in 2006.
7. Questionnaire
9. Evaluation sheet
2. Visual description of the method-‐11. General information
3. Visual description of the method -‐24. Technical drawings 2D5. Explanation of the method6. Calculation sheet
8. Sustainability
European strawbale building methods
Leonardo da Vinci_PARTNERSHIPS 2009/2011_STRAWBALE BEST BUILDING PRACTICE IN EUROPE
2. Visual description of the method-‐1 Evaluation of best building practices3D – 1
Method of construction: Post and Beam (wrap ID: PB-‐02Representative: Boris Hochel
Contact: [email protected] www.ozartur.sk
view from exterior
wraping with strawbales from exterior
European strawbale building methods
Leonardo da Vinci_PARTNERSHIPS 2009/2011_STRAWBALE BEST BUILDING PRACTICE IN EUROPE
3. Visual description of the method -‐23D – 2
Method of construction: Post and Beam (wrap ID: PB-‐02Representative: Boris Hochel
Contact: [email protected]
view from outside
view from inside
European strawbale building methods
Leonardo da Vinci_PARTNERSHIPS 2009/2011_STRAWBALE BEST BUILDING PRACTICE IN EUROPE
4. Technical drawings 2D Evaluation of best building practices
Method of construction: Post and Beam (wrap ID: PB-‐02Representative: Boris Hochel
Contact: [email protected]
without scale
European strawbale building methods
Leonardo da Vinci_PARTNERSHIPS 2009/2011_STRAWBALE BEST BUILDING PRACTICE IN EUROPE
5. Explanation of the method Evaluation of best building practices
Method of construction: Post and Beam (wrap ID: PB-‐02Representative: Boris Hochel
Contact: [email protected]
Stone foundations Post and beam construction including roof and floor
Wraping strawbales arround the house with a help of boards
Interior with painted earth plaster
General overview of the house
Plastering strawbales with clay from exterior
European strawbale building methods
Leonardo da Vinci_PARTNERSHIPS 2009/2011_STRAWBALE BEST BUILDING PRACTICE IN EUROPE
7. Questionnaire
Method of construction: Post and Beam (wrap ID: PB-‐02Representative: Boris Hochel
Contact: [email protected]
1
2
3
4
Fixation of balesHow are your bales secured in the wall?Wooden boards push the bale against the wall fixed with hook and rope. Hazel pins are also used to fix the bales
3.1 How do you deal with potential of rain bouncing from the ground surface and ground humidity?
Bales without gaps
Moisture
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
3.2 How do you deal with possibility of water intrusion from building’s interior at each floor level?
First we built the wooden structure infilled with bricks and the roof. The walls are then wrapped ith strawbales from outside
Bottom of the first row of bales is lifted minimum 45 cm above the ground
With 2 layers of clay plaster and finishing layer of lime plaster
Bales
3.5 How do you prevend water leakage at the window sill detail?
The window sill is made of tin with splayed drip on the edge
3.3 How do you protect straw in your walls against wind driven rain?
3.4 How do you protect your wall during it’s construction from weather?
Irrelevant
What are your criteria of bale quality (shape, density, moisture content…)? Give the borderline values.
Humidity < 15% / density 130 kg/m3 / bales : 500/400/800mm
European strawbale building methods
Leonardo da Vinci_PARTNERSHIPS 2009/2011_STRAWBALE BEST BUILDING PRACTICE IN EUROPE
7. Questionnaire
Method of construction: Post and Beam (wrap ID: PB-‐02Representative: Boris Hochel
Contact: [email protected]
5
6
7
What do you do to secure airtightness of the walls? Wall to ceiling, opening or ground floor. Is there a blowerdoor test?
Wall coating
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)?Jute mash overlapping at least 200mm over to each side
How do you ensure bond of the plaster/render (if included in your wall’s assembly) with the straw?
5.1 Plaster
Fixing all the gaps, in the floor is breathable foil under the balesFire resistance
Yes
Airtightness
3 layers of render
How do you protect the walls from fire, while building and after? Do you refer to official approvals?
European strawbale building methods
Leonardo da Vinci_PARTNERSHIPS 2009/2011_STRAWBALE BEST BUILDING PRACTICE IN EUROPE
8. Sustainability
Method of construction: Post and Beam (wrap ID: PB-‐02Representative: Boris Hochel
Contact: [email protected]
Primary energy demand non renewable (PED) for construction and total transmission heat loss after 50 years
THL [kWh/m2]587
THL fp=0,6 [kWh/m2]
352
PED [kWh/m2]88
CO2-‐ Balance for construction
CO2-‐ Balance [kg CO2 eq./m2]-‐68
U-‐ Value and acidification potential
U-‐ Value [W/m2K]0.149
Acidification [kg SO2 eq./m2]0.139