3. application of timber in environmental building


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3. application of timber in environmental building

  1. 1. Application of timber in Environmental Building The Mint, Sydney Francis-Jones, Morehen Thorp
  2. 2. Environmentally sustainable building <ul><li>Key considerations when designing/building an environmentally sustainable building are: </li></ul><ul><li>Energy consumption (embodied and operational) </li></ul><ul><li>Water consumption </li></ul><ul><li>Impact on the environment </li></ul><ul><li>Healthy to live and work in </li></ul>
  3. 3. Material considerations <ul><li>To construct an environmentally friendly building will require a mixture of the most appropriate materials; </li></ul><ul><li>Good design for the local climate and site is vital to building an environmentally sustainable home. </li></ul><ul><li>In this presentation we use timber as a vehicle to highlight the principles of building environmentally friendly homes. </li></ul>
  4. 4. 1. Energy considerations <ul><li>Embodied energy: </li></ul><ul><ul><li>“ The energy invested in the materials and construction of the house.” </li></ul></ul><ul><li>Operational energy: </li></ul><ul><ul><li>“ The ongoing energy used in the house. Operational energy includes energy used to heat and cool (maintain thermal comfort), as well as energy used by household appliances.” </li></ul></ul>
  5. 5. Embodied energy <ul><ul><li>Timber has a low embodied energy. So, less energy is ‘invested’ in the building initially. </li></ul></ul><ul><ul><li>Reminder: </li></ul></ul>Energy Considerations > Embodied Energy
  6. 6. Indicative embodied energy values for common building elements 1465 Clay tile, timber frame 1080 Metal cladding, timber frame 870 Concrete tile, steel frame 755 Concrete tile, timber frame Roofs Incl. plasterboard ceiling, R2.5 insulation, gutters, eaves 1595 Aluminium Frame 880 Timber frame Windows Incl. 3mm glass 1975 Double brick 1060 Brick veneer, timber frame 410 Weatherboard, timber frame Walls Incl. as appropriate, framing, internal lining, insulation 1235 Concrete slab on ground 1050 Timber suspended, brick sub-floor wall 740 Timber suspended, timber sub-floor enclosure Floors Incl. flooring, farming, footings, reinforcement, DPC, membranes.. MJ/m 2 Description Element
  7. 7. Thermal comfort <ul><li>Maintaining a warm or cool environment inside our homes can consume a lot of energy. We can design thermally efficient buildings by: </li></ul><ul><ul><li>understanding the local climate </li></ul></ul><ul><ul><li>Passive solar design </li></ul></ul>Energy Considerations > Operational Energy
  8. 8. Thermal comfort <ul><li>Homes can be kept comfortable by: </li></ul><ul><ul><li>Use of solar energy </li></ul></ul><ul><ul><li>Controlling air flow into and out of the building </li></ul></ul><ul><ul><li>Controlling heat gain and losses (insulation) </li></ul></ul>Energy Considerations > Operational Energy
  9. 9. <ul><li>There are two different construction approaches to achieve thermally efficient buildings: </li></ul><ul><li>Thermal Mass </li></ul><ul><li>Lightweight construction with correct detailing </li></ul>Construction approach & thermal performance Energy Considerations > Operational Energy
  10. 10. High thermal mass solution <ul><li>Thermal mass works in association with : </li></ul><ul><ul><li>correct orientation </li></ul></ul><ul><ul><li>correct window design </li></ul></ul><ul><ul><li>sun shading </li></ul></ul><ul><li>Small changes in these can cause large changes in the effectiveness of thermal mass. </li></ul>Energy Considerations > Operational Energy
  11. 11. Lightweight construction options <ul><li>Lightweight construction, detailed for the local climate, can offer a more versatile solution as: </li></ul><ul><ul><li>The Snug house for cool climates </li></ul></ul><ul><ul><li>The Breeze house for warm coastal climates </li></ul></ul><ul><ul><li>A combination of the two for inland areas </li></ul></ul>Energy Considerations > Operational Energy
  12. 12. Benefits of lightweight options <ul><li>Lightweight construction can provide good options for the following sites: </li></ul><ul><li>Hot, humid climates; </li></ul><ul><li>Sloping or shaded sites; </li></ul><ul><li>Sites with sensitive landscapes </li></ul>
  13. 13. Zones for each location Climate-appropriate design
  14. 14. The snug house <ul><li>This is a house that is well insulated and sealed . </li></ul><ul><li>Solar access is used to heat and ventilation to cool where available and appropriate. </li></ul>Energy Considerations > Operational Energy
  15. 15. A snug design <ul><li>A predominantly timber house in Victoria </li></ul><ul><ul><li>Good solar access </li></ul></ul><ul><ul><li>Shaded windows </li></ul></ul><ul><ul><li>Thorough insulation </li></ul></ul><ul><ul><li>Wood waste for heating. </li></ul></ul>Energy Considerations > Operational Energy Studio 101 Architects Virgo Residence
  16. 16. The breeze house <ul><li>This is a house that that is open , light and naturally ventilated . </li></ul><ul><li>Solar access is controlled by shades and ventilation is provided by careful window, door and ventilator placement. </li></ul>Energy Considerations > Operational Energy
  17. 17. A breeze design <ul><li>It includes: </li></ul><ul><li>careful orientation </li></ul><ul><li>shaded openings </li></ul><ul><li>wide eaves </li></ul><ul><li>light construction </li></ul><ul><li>plentiful ventilation. </li></ul>Energy Considerations > Operational Energy
  18. 18. 2. water consumption <ul><li>Embodied Water: </li></ul><ul><ul><li>“ T he water invested in the production of the materials and construction of the house.” </li></ul></ul><ul><li>Just as we consider embodied energy, we consider embodied water in the same way. </li></ul>Water Considerations > Embodied Water
  19. 19. 2. Water consumption <ul><li>The use of timber can effect water consumption in two ways: </li></ul><ul><li>Timber comes from forests that are also managed to harvest water; </li></ul><ul><li>No water is required on site to construct with timber. </li></ul>Water Considerations > Timber construction
  20. 20. 3. Impact on the environment <ul><li>Timber designs can have a very small footprint on a site. For example, a pole framed home may be suspended over a sensitive landscape. </li></ul>JMA Architects Viridian Villas
  21. 21. 4. Healthy to live in <ul><li>Timber can add to a healthy environment in two ways, (locally and globally): </li></ul><ul><li>Timber is a natural, organic and inert material for interior and exterior use; </li></ul><ul><li>Timber production has a positive impact on our global environment. </li></ul>
  22. 22. Using timber in environmentally friendly building <ul><li>Timber can help with: </li></ul><ul><ul><li>1. Design flexibility </li></ul></ul><ul><ul><li>2. Straightforward construction </li></ul></ul><ul><ul><li>3. Low energy consumption </li></ul></ul><ul><ul><li>4. Using renewable resources </li></ul></ul><ul><ul><li>5. Design for deconstruction </li></ul></ul>
  23. 23. 1. Design flexibility <ul><li>Standard carpentry practices can be used to create some elaborate designs: </li></ul>Warwick Donnelly Pty Ltd The Atrium Roof to the Deerubin Centre
  24. 24. Design flexibility BKK Architects 2Parts House
  25. 25. Design flexibility BKK Architects Frame House
  26. 26. Design flexibility Dawson Brown Architecture Bungan Beach House
  27. 27. Design flexibility Collier & Reid Pty Ltd Architects Narana Creations Performance Theatre & Exhibition Building
  28. 28. Design flexibility Inarc Architects Mount Macedon Residence
  29. 29. Design Flexibility Lahz Nimmo Architects Casuarina Beach House
  30. 30. 2. Straightforward construction <ul><li>Carpenters and builders understand timber, and there are National Standards on timber construction; AS 1684, Residential Timber Framed Construction available in 3 parts. </li></ul>
  31. 31. 3. Low energy consumption <ul><li>Timber consumes little energy in its production, and little energy has to be used to construct with timber on site; </li></ul><ul><li>Timber can be used to construct innovative and low operational energy houses. </li></ul>
  32. 32. 4. Using renewable resources. <ul><li>Timber is a renewable resource! </li></ul>
  33. 33. 5. Design for deconstruction <ul><li>Demolition or adapting a building can be costly in terms of energy and materials. In order to minimise these costs buildings should be built in such a way that they are easy to take apart, and the materials reused where possible. </li></ul>
  34. 34. Summary <ul><li>Timber can contribute in Environmentally friendly buildings by providing: </li></ul><ul><li>Low energy consumption </li></ul><ul><li>Low water consumption </li></ul><ul><li>Low impact on the environment; </li></ul><ul><li>A healthy material to live with. </li></ul>