Building Officers Sustainability Nbt Final


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Building Officers Sustainability Nbt Final

  1. 1. Neil May Matt Robinson Sustainable Building in Practice
  2. 2. Natural Building Technologies <ul><li>Environmental building systems. </li></ul><ul><li>Full technical support (design to site) </li></ul><ul><li>Our systems are proven on the continent over many years </li></ul><ul><li>Cost effective when compared to ‘traditional’ UK systems. </li></ul>
  3. 3. <ul><li>Clay block, masonry replacement system </li></ul><ul><ul><li>Faster, simpler, higher performance, lower environmental cost. </li></ul></ul><ul><li>Rigid, natural insulation boards </li></ul><ul><ul><li>for timber and steel frame, masonry and roof systems </li></ul></ul><ul><ul><li>Insulation from cold, heat and sound. Fast, simple and lower environmental cost. </li></ul></ul><ul><li>Modern mineral (lime) </li></ul><ul><ul><li>renders, plasters and mortars. </li></ul></ul><ul><li>NBT Natural Insulations (hemp, wool, cellulose) </li></ul><ul><li>NBT contract eco-paints </li></ul>Natural Building Technologies
  4. 4. The Issue: Buildings <ul><li>Use too much: </li></ul><ul><ul><li>Energy </li></ul></ul><ul><ul><li>Resources </li></ul></ul><ul><li>Generate too much: </li></ul><ul><ul><li>Waste </li></ul></ul><ul><ul><li>C0 2 </li></ul></ul><ul><li>In general are: </li></ul><ul><ul><li>Unhealthy </li></ul></ul><ul><ul><li>Lived in by humans </li></ul></ul>
  5. 5. The Issue – UK energy use
  6. 6. The route: <ul><li>2006, 2010, 2016 building regs – Part L </li></ul><ul><li>Code for Sustainable Homes </li></ul><ul><li>Low Carbon Building Programme </li></ul><ul><li>Green Taxes? </li></ul>
  7. 7. 2010, 2016 and beyond <ul><li>“ Those parts of the Code for Sustainable Homes that will become mandatory in 2010 (relating to energy use) will be enforced by amending Part L of the building regulations...” </li></ul><ul><li>Environmental Audit Committee , House of Commons , 12 th report, Oct 2008 </li></ul>
  8. 8. The Ten Essential Functions of Building Control (acc. LABC) <ul><li>Encourage innovation to produce energy efficient and sustainable buildings </li></ul><ul><li>Support local, regional and national businesses </li></ul><ul><li>Educate and inform building professionals, contractors and trades people </li></ul><ul><li>Defend vulnerable communities and householders </li></ul><ul><li>Drive out dangerous cheats and rogue traders </li></ul><ul><li>Safeguard the investments of individuals and companies </li></ul><ul><li>Enhance access for disabled, sick, young and old people </li></ul><ul><li>Protect the community from dangerous structures </li></ul><ul><li>Provide life-saving advice to the emergency services </li></ul><ul><li>Ensure sports grounds and public venues are safe for crowds </li></ul>
  9. 9. Step Change Today 2016
  10. 10. Current Situation
  11. 11. Is Zero truly 0 ? <ul><li>What if ‘Zero’ is unnafordable? </li></ul><ul><li>What if we use a lot of energy and create a lot of pollution to do ‘Zero’? </li></ul><ul><li>What if ‘Zero’ doesn’t exist? </li></ul><ul><li>Is there a ‘sweet spot’ just below ‘Zero’? </li></ul>
  12. 12. Inertia and Resistance <ul><li>Really Sustainable? </li></ul><ul><ul><li>Greenwash </li></ul></ul><ul><ul><li>Theory vs Reality </li></ul></ul><ul><ul><li>Offsetting is wrong </li></ul></ul><ul><li>Who checks the claims? </li></ul>
  13. 13. Greenwash and Carbon con's <ul><li>Some Eco-Technology </li></ul><ul><ul><li>Under delivering </li></ul></ul><ul><ul><li>Poor Value </li></ul></ul><ul><ul><li>Maintenance cycles </li></ul></ul><ul><ul><li>Increase in costs </li></ul></ul><ul><li>Eco-clichés get in the way of good, efficient and truly environmental solutions. </li></ul><ul><li>Howard Liddell </li></ul><ul><li>Gaia Architect </li></ul>
  14. 14. Current Situation <ul><li>Stamford Brook: </li></ul><ul><li>710 cavity wall masonry dwellings </li></ul><ul><li>Monitoring of design and construction issues by Leeds Met. University. </li></ul><ul><li>CO 2 Was 10%ish better than 2006 standards </li></ul><ul><li>Many other sustainable features (recycling, wildlife, transport etc) </li></ul><ul><li> </li></ul>
  15. 15. Current Situation <ul><li>Stamford Brook: </li></ul><ul><li>710 cavity wall masonry dwellings </li></ul><ul><li>Monitoring of design and construction issues by Leeds Met. University. </li></ul><ul><li>CO 2 Was 10%ish better than 2006 standards </li></ul><ul><li>Many other sustainable features (recycling, wildlife, transport etc) </li></ul><ul><li> </li></ul>42% missed the 5ach target for infiltration Heat loss co-efficient 75-105% worse than predicted
  16. 16. Stamford Brook Findings: Infiltration Lights, loft hatches, wall/floor and wall/roof junctions, partition walls Patio door – unsealed threshold Rooflights leaked around frames, seals and trickle vents Service penetrations particular problem
  17. 17. Stamford Brook Findings: Heat loss <ul><ul><li>Y-values </li></ul></ul><ul><ul><ul><li>Poor design AND </li></ul></ul></ul><ul><ul><ul><li>Not built ‘as designed’ </li></ul></ul></ul><ul><ul><li>Party wall heat losses </li></ul></ul>
  18. 18. Stamford Brook Findings Nominal vs. Realised Heating System Efficiencies Nominal vs. Realised Thermal Bridging Y-values Nominal vs. Realised Fabric U-values ‘ Build-ability ’ problems and lack of knowledge Occupant effects – e.g. Removing CFL’s
  19. 19. UK Construction Standards: Some Shocking Facts <ul><ul><li>50% of new builds miss ‘as designed’ energy use by up-to 50%. </li></ul></ul><ul><ul><li>30% of new builds fail infiltration standard of 10ach@5pa </li></ul></ul><ul><li>Energy Saving Trust (2004 and 2007) </li></ul><ul><li>Room in roof U-values on average 104% worse than ‘as calculated’ </li></ul><ul><ul><li>Average full-fill cavity wall was 20% worse than ‘as calculated’ </li></ul></ul><ul><li>Dept. Environment Travel Regions (DETR) (2001 report) </li></ul><ul><li>Energy use in residential buildings has increased by 20% since 1970 </li></ul><ul><li>Building Research Establishment (BRE 2003+2007) </li></ul>
  20. 20. Building Control: Part L Compliance <ul><li>Building Control Officers overwhelmingly look for a CORGI, HETAS or OFTEC installer as a suitably qualified certifier for the relevant elements of Part L (2002) </li></ul><ul><li>Part L was low in the priority ranking for many Building Control departments as it was seen as “not life threatening” </li></ul><ul><li>In the case of a non-compliant element, Building Control officers were unlikely to take steps to ensure enforcement or withhold the completion certificate </li></ul><ul><li>The Energy Efficiency Partnership for Homes (Future Energy Solutions) </li></ul><ul><li>Building Regulations Compliance (BRE ) </li></ul>
  21. 21. Knowledge and Training: <ul><li>The general perception is that there is a need of attitude change to ensure that compliance is improved both, within Building Control and the construction industry itself. </li></ul><ul><li>The actors most responsible for this non-compliance were the building contractors themselves; but architects, heating engineers and electricians were also thought to play a role. </li></ul><ul><li>Much of this non-compliance was due to onsite cost cutting, ignorance and a lack of knowledge . </li></ul><ul><li>The Energy Efficiency Partnership for Homes (Future Energy Solutions) </li></ul><ul><li>Building Regulations Compliance (BRE ) </li></ul>
  22. 22. Step Change Today 2016
  23. 23. If I was to go there, would I start here? UK Construction industry 2008 UK Construction industry 2016
  24. 24. Solutions
  25. 25. It’s OK, the solutions are clear...people have done this for years... <ul><li>The continent – Northern Europe and Scandinavia </li></ul><ul><li>Scotland </li></ul><ul><li>Canada </li></ul>
  26. 26. Eco or Sustainable or.... <ul><li>Passive Haus </li></ul><ul><ul><li>‘ Ultra low energy building standard.’ </li></ul></ul><ul><li>R2000 </li></ul><ul><ul><li>‘ ...based on an energy consumption target.’ </li></ul></ul><ul><li>Minergie </li></ul><ul><ul><li>‘ ...quality label for new and refurbished low-energy-consumption buildings.’ </li></ul></ul><ul><li>UK 2006 L2 </li></ul><ul><ul><li>‘ Conservation of fuel and power...’ </li></ul></ul>
  27. 27. Best Value Solutions
  28. 28. The Solution <ul><li>“ Construction is about creating thermal efficiency, not mini power stations.” </li></ul>Imtiaz Farookhi Chief Executive NHBC
  29. 29. Matt’s ‘Six Steps to Sustainability’
  30. 30. We have the solution no.1 <ul><li>Thermal coherence of the building shell </li></ul><ul><ul><li>Good (low) U Values </li></ul></ul><ul><ul><li>Good (low) Y Values </li></ul></ul><ul><ul><li>Low Infiltration rates </li></ul></ul><ul><ul><li>Thermal response </li></ul></ul><ul><ul><li>Decrement Delay </li></ul></ul>
  31. 31. We have the solution no.2 <ul><li>Passive features </li></ul><ul><ul><li>Orientation </li></ul></ul><ul><ul><ul><li>Passive solar (heat) gain </li></ul></ul></ul><ul><ul><ul><li>Passive solar (light) gain </li></ul></ul></ul><ul><ul><ul><li>Manage glazing heat loss </li></ul></ul></ul><ul><ul><li>Shading (planting or built </li></ul></ul><ul><ul><li>Shelter belts </li></ul></ul>Images: Greenspec
  32. 32. We have the solution no.3 <ul><li>Increase in air-tightness means: </li></ul><ul><li>Air Quality </li></ul><ul><ul><li>Avoid toxic or off-gassing materials </li></ul></ul><ul><li>Ventilation </li></ul><ul><ul><li>10-3ach = Passive ventilation? </li></ul></ul><ul><ul><li>3ach or better = MVHR? </li></ul></ul>
  33. 33. We have the solution no.4 <ul><li>Moisture management </li></ul><ul><li>Active </li></ul><ul><ul><li>effective ventilation (MVHR or passive) </li></ul></ul><ul><li>Passive </li></ul><ul><ul><li>True ‘Breathing wall’ systems </li></ul></ul>
  34. 34. We have the solution no.5 <ul><li>Appliances </li></ul><ul><ul><li>A-rated </li></ul></ul><ul><ul><li>Low energy lights </li></ul></ul><ul><li>Hot water </li></ul><ul><ul><li>Reduce demand </li></ul></ul><ul><ul><li>Reduce dead legs and pipe runs </li></ul></ul><ul><ul><li>Heat efficiently </li></ul></ul>
  35. 35. We have the solution no.6 <ul><li>Lower heating and cooling loads and peak demands </li></ul><ul><li>= </li></ul><ul><li>use renewables effectively </li></ul>
  36. 36. We have the solution no.7 <ul><li>Face up: </li></ul><ul><ul><li>We are doing something fundamentally wrong </li></ul></ul><ul><li>Train and educate: </li></ul><ul><ul><li>Construction industry </li></ul></ul><ul><ul><ul><li>( From liability to responsibility) </li></ul></ul></ul><ul><ul><li>Building Occupiers </li></ul></ul><ul><ul><ul><li>( Cardie culture, Brookes-Khazoom etc ) </li></ul></ul></ul>
  37. 37. Summary of ‘The Solution’ <ul><li>Efficiency / passive is 80% of the battle </li></ul><ul><li>(PART L) </li></ul><ul><li>Renewables /active are last 20% </li></ul><ul><li>(‘Merton Rule’?) </li></ul><ul><li>Think about managing moisture </li></ul><ul><li>Train and Educate </li></ul>
  38. 38. If you could focus on one thing.... <ul><li>“ Thermal bridging was shown as the worst area of non-compliance. Other significant non-compliance areas included conservatories, u-values , areas of windows , doors and rooflights , internal lighting , commissioning certificates , O&M manuals and air-leakage” </li></ul><ul><li>The Energy Efficiency Partnership for Homes (Future Energy Solutions) </li></ul><ul><li>Building Regulations Compliance (BRE ) </li></ul>
  39. 39. Resources <ul><li>“ We recommend that much greater emphasis is placed on energy efficiency and sustainability within building control , with the Government ensuring that extra training and resources are made available to local government where necessary. We also recommend that the Government urgently reviews ways of improving the rigour of inspections carried out by private approved inspectors.” </li></ul><ul><li>Environmental Audit Committee , House of Commons , 12 th report, Oct 2008 </li></ul>
  40. 40. Holistic Solutions <ul><li>Energy </li></ul><ul><li>Carbon </li></ul><ul><li>Resources </li></ul><ul><li>Building Fabric </li></ul><ul><li>Human Health </li></ul><ul><li>Deliverability </li></ul><ul><li>Durability </li></ul>
  41. 41. Its a Team Effort <ul><li>Client </li></ul><ul><li>Architects </li></ul><ul><li>Planners </li></ul><ul><li>M&E </li></ul><ul><li>Structural </li></ul><ul><li>Building Control </li></ul><ul><li>Contractor </li></ul><ul><li>Subbie </li></ul>They need to understand all this (and more)
  42. 42. Neil May Matt Robinson Thank you