structural insulated panels are they the sustainable solution to standard light framed load- bearing...
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‘Structural Insulated Panels’
are they the sustainable solution to standard light framed load-
bearing construction in New Zealand ?
www.portersips.com/STRUCTURAL/SIPS_house12b.jpg
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Structural Insulated Panel Systems (SIPs)
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Construction
The panels are slotted together to form the structurestructure of the building
– without framing
http://www.precisionpanel.com
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Structurally Insulated Panel Systems (SIPs)
Can be used as: • Walls• Floors• Roofs• Interior walls• Additions to other
construction systems
Kingspan
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Claims for SIPs by manufacturers and suppliers are similar
• Energy efficient
• Renewable
• Waste efficient
• Healthywww.greenlibdems.org.uk
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Systems of measuring sustainable building
• BREEAM • EPBD
• BEPAC
• LEED
• GBP
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Standard for measuring sustainable building
• Sustainable site planning
• Safeguard water and water efficiency
• Energy efficiency and renewable energy
• Conservation of materials and resources
• Material toxicity and emissions
• Waste reduction
• Indoor environmental air quality
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Standard for measuring sustainable building
• Sustainable site planning• Safeguard water and water efficiency
• Energy efficiency and renewable energy
• Conservation of materials and resources
• Material toxicity and emissions• Waste reduction• Indoor environmental air quality
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Claims for SIPs by manufacturers and suppliers are similar
• Energy efficient
• Renewable
• Waste efficient
• Healthy
• Energy efficiency and renewable energy
• Conservation of materials and resources
• Waste reduction
• Material toxicity and emissions
• Indoor environmental air quality
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Research QuestionResearch Question
Are SIPs the sustainable solution to standard light framed load-bearing construction in New Zealand?
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New Zealand light timber frame house construction
• 90% of all new houses in NZ• From softwood plantation timber• Framing comprises 15-25% of the wall • Treated with CCA• Manufactured from 60% of the tree • Large amount of waste generated • Requires insulation• Subject to settlement creating draughts
www.woodengineering.com
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Structural Insulated Panels systems (SIPs)
• From fast growth plantation timbers• Foam insulation from petroleum industry• Comprises all of the wall excluding exterior
cladding• Timber panel and plastic foam are both
chemically treated.• Engineered wood panels use of 90% of the tree • Very little waste generated• Excellent insulation and air tightness capabilities
files.servicemagic.com
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Energy efficient
0
0.5
1
1.5
2
2.5
3
Whole Wall Thermal Resistance of SIPsCompared to Light Timber Framing
Whole wall r-value (K-m2/W)
SIP Light timber
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Renewable
• Timber is plantation growth – renewable
• Insulation can be renewable material
• Timber is plantation growth
• Insulation is recyclable but not renewable
www.greenbuilders.com
www.goodfellowinc.com
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Waste efficient
• Construction waste makes up 50 % of all landfill content, 38% is timber and wood fibre
• SIPs generate less waste – in primary processing
stages– in secondary processing
stages– in construction phase
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Healthy
• Manufacturing health risks with both processes
• Construction health risks are reduced with SIPs
• SIPs construction is more air tight
• SIPs have greater thermal resistance
• Humidity control is easier with SIPs
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Ecological/Environment
Equity (society)Economic
SUSTAINABILITY
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Are SIPs the sustainable construction solution in NZ?
• Timber surplus• Limited petrochemical
industry• Skilled labour shortages
Relatively low cost of labour
• Inefficient transport network
• Timber shortage• Petrochemical industry• Skilled labour
shortages• High cost of labour• Efficient land transport
network • Demand for reduced
construction period
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Conclusion
SIPs are not currently the sustainable solution to standard light framed load-bearing construction in New Zealand
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However…..
www.niksula.hut.fi/~haa/kobe/earthq3.jpg blog.lewrockwell.com