Blake Lapthorn Construction green breakfast 9 November 2011
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Transcript of Blake Lapthorn Construction green breakfast 9 November 2011
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RIDGEProperty and Construction Consultants
Green Breakfast: Why bother with energy efficient buildings?
Darren Aspinall Architect9th November 2011
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RIDGE
Agenda
Wake you all up….Why Bother with Energy Efficient buildings?The Global ContextThe Local ContextBuilding Issues
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RIDGE
Global Context
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RIDGE
Global Context
Reliance on non-finite fossil fuelClimate Change
• Global Warming (0.75°C increase in a Century)• Higher temperatures• Extreme weather conditions• Flooding & Drought• Pollution• Impact upon Biodiversity
Increasing Energy Costs• Resource depletion• Peak oil• Fuel Poverty• Security of supply
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RIDGE
Local Drivers….Legislative
• Kyoto Protocol (Cut Greenhouse Gas emissions by 12.5% by 2012)• Climate Change Act 2008 (26% Co2 reduction by 2020, 80% by 2050)• Building Regulations Part L step change• Code for Sustainable Homes (CSH) & BREEAM• Planning Requirements via the Environment Agency• Funding requirements (DCSF)
Local Impacts upon building….Increased ComplexityIncreased TimeIncreased CostIncreased Performance?
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RIDGE
Global Context
Is it all a ‘drop of water in a sea of oil’?Can Developing Countries be balanced?
• World energy consumption is expected to grow 53% by 2035• Predicted that global carbon emissions will increase by 43% by 2035• Half of this growth expected from China and India• China: Currently building at a rate of 2 coal fired power stations/week
That’s a lot of trees for the developed world to hug!‘Business as usual’Technology & science will find a way
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RIDGE
Global Context
A battle for the hippie tree huggers?From the early adopters to the mainstream?
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RIDGE
Local UK Context
The Market• Existing Building Stock• Feed in Tariff / Renewable Heat Incentives• Resistance to renewable technologies• ‘Scale-ability’ of renewable technologies• Lifestyle: needs to become trendy • People vote with their wallets
How many MPG does your building do?• Design performance Vs actual ‘in use’ performance• Lack of comparable reliable data• User preference & short circuiting (‘Human factor’)• Young/Old, Male/Female differences
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RIDGE
Building issuesFabric measures
• Is heat loss such a big problem? • Design for climate change & heat gain?• Fabric insulation – Bigger Buildings!• Air tightness & controlled ventilation• The construction team just don’t get it!
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RIDGE
Building issuesTechnology Measures
• Reliability & Robustness• Capital cost & payback• Complexity of use• Maintenance requirements – like a car? • Aesthetics issues for roll out
Standards & Skills• Inconvenient, onerous & unrealistic ‘tick box brigade’ standards• Larger design teams with more up-front costs• Inconsistent Planning System• Lack of design & construction skills to deliver standards• User knowledge & training
Supply chain Issues• Is it yet mainstream? • Same cost? Same delivery time? Same quality?
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RIDGE
The solution?
Flood resistant! FSC certified timberExempt from BREEAMLow Tech build and useSail to another country if you need to!
You don’t need an Architect to design one!
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Construction Green Breakfast Blake Lapthorn
09th November 2011
Low Energy Building Design – Why Bother ?
Gavin Walker – C. Eng LCC
Peter Brett Associates LLP
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Low Energy Building
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A Few Alternatives
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Bother One – Emissions Reductions
climate change – more extremes hotter summerswetter wintersextreme events – flooding, hurricanes, droughtsreparations – “to those who will not have the benefit of two billion years of accumulated reserves” David Mackay - Sustainable Energy without the Hot Air
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Low Carbon buildings
EMBODIEDdemolitionconstructiontransport
OPERATIONALregulatedunregulated
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Bother Two : Security
Russian Gas
Middle Eastern Oil
Brazilian Sugar Cane
Canadian Biomass
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Bother Three : Legislation
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Bother Three : Legislation
Planning policiesmandatory emissions standardsmandatory fabric efficiency standardszero carbon residential 2016zero carbon public buildings 2018zero carbon buildings 2019
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Bother Four – What are buildings for ?
ProductivityComfortHealth and well being
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Bother Five - Economics
MICROreduce fuel billsrevenue from Gov subsidiesresearch grants
MACROcontrol economic conditionsbuild another economic base –forefrontasset values
marketingreduced vacancy rates
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Summary
B1 : Climate change responsibilitiesB2 : Energy Security
B3 : Legislation GOOD DESIGNB4 : ComfortB5 : Economics
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How do we do it ?
Lean – passive / activeMeanGreenAllowable solutionsFinancial Pooling