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The brainchild of James Hardie's research and development team, ScyonTM is an advanced lightweight cement composite with heavy-duty performance. ScyonTM products bring advanced building technology to the houses of today, with an eye on tomorrow.


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Architect: David Scott

Temperate climates

These climates require a balanced approach to solar design and ventilation. However, the right balance of passive design for solar heating in winter, combined with good design for passive cooling in summer, can almost eliminate artificial heating and cooling. A sensible approach to thermal mass, mainly in floors, can be combined with insulated walls and roofs to minimise energy use when it is required. Take special care to choose appropriate glazing and protect from summer overheating.

 

  1. Eaves are designed to admit winter sun. Heat is stored in the thermal mass in the floor.
  2. Heat is released at night.
  3. Heavy drapes or other window insulation to minimise heat loss at night.
  4. Reverse mass construction and double glazing should be used in cooler regions.
  5. Well insulated ceilings and roofs are required in all regions.
  6. Heat is absorbed during summer day to keep interior cooler.
  7. Night-time flushing removes stored heat.
     

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Design elements Design essentials Best practice design options Recommended James Hardie materials
Siting Encourage good orientation to north while reducing wall and glazing areas to east and west. Layout of dwelling should make optimum use of favourable orientations. Site new homes for solar access, exposure to cooling breezes and protection from cold winds.  
Sub-floor and floor Use slab on ground where possible to incorporate high thermal mass, in association with passive solar design. If building on sloping sites using bearer and joist construction in steel or timber, insulate the sub-floor and reduce sub-floor ventilation to the minimum. Consider minimising ventilation cavities through walls from the sub floor to the roof to prevent heat leakage.  
Roof Bulk insulate ceilings. Use reflective sarking under tile roofs. Light coloured metal deck roofs should be fixed over an insulation blanket/foil laminate suitable for condensation control.  
Walls Use reflective insulation to keep out heat in summer and bulk insulation to keep heat in during winter. Use reflective sarking under tile roofs. Under metal roof sheets, use insulation blanket with downward facing foil. Any James Hardie cladding material in combination with bulk insulation and reflective foil.
Openings Carefully balance orientation of glazing to provide optimum north facing passive solar access for living areas. Minimise east, west and south facing glazing. Use cross ventilation and passive cooling in summer. Use heavy drapes with sealed pelmets, or close fitting blinds to insulate windows for winter nights. Draught seal thoroughly and use entry airlocks.  
Clip-ons Design eaves and other sun shades of correct proportions for summer shade to both walls and glazing, and use adjustable shading to windows. Use extended pergolas for outdoor living. Provide shade in summer and sun in winter. For pergolas and adjustable window shading systems, use HardiPanel® compressed sheets or Scyon™ Trim battens with appropriate design and detailing. See examples in The Smarter Design Book at http://jameshardie.com.au/smarterdesign James Hardie eave lining materials like Versilux® lining and HardiGroove® lining for soffits.
Landscape elements Consider some deciduous planting for summer shade and winter sun.    



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