Energy Efficency


Selecting a window or door that combines quality aluminium frames, high performance glass and long-lasting weather resistant seals. Accounting for up to 90% of the thermal performance of windows and doors, glass is the most influential factor in determining window and door energy efficiency. Coastal is proud to offer a total window and door solution for your next project. High performance aluminium windows can easily achieve heating and cooling improvements of more than 60% over conventional systems and rivaling more expensive alternatives such as thermally broken aluminium, timber and PVC.



  • Meets or exceeds energy standards when combined with energy efficient glass.

  • Low maintenance and durable; won’t swell, crack, split or warp.

  • Reduced carbon footprint with energy savings outweighing initial energy input by over 100 times over the life of a building.

  • Corrosion resistant qualities and resistant to weathering under a range of harsh environmental conditions.

  • Economical framing solutions that can be less expensive than other framing options.

  • Strong and durable providing a range of long lasting design options.

  • Environmentally sustainable material with one of the highest recycling rates of any metal.

  • DecoWood options achieve an attractive alternative timber look.

  • Range of coloured finishes to match a home’s decor.

  • Significant performance improvements provide a short payback period.



Our climate is getting warmer. Australians are now using more energy to cool than to heat their homes. The use of energy efficient windows and doors can save up to 60% of your energy costs to heat and cool in all climates. While climate change is often referred to as an abstract far-off phenomenon the fact is we are already experiencing the effects of a changing climate.

Australian average temperatures have increased by 0.9% degrees since 1950, while the frequency of hot days and nights has increased and the frequency of cold days and nights has declined. To help combat the changing climate there are some passive design techniques that you can apply to make your building more comfortable whilst saving on energy costs.



Simple things like orientating your home to take advantage of available sunlight and selecting energy efficient windows and doors can make a real difference.

The following checklist provides a sound starting point for considering how best to maximise the energy efficiency of your home by utilising passive design principles.

  • Main living areas oriented north to maximise winter sun and minimise summer sun.

  • Rooms are zoned or grouped and divided as needed for economical heating and cooling.

  • Eaves or shading devices have been incorporated to provide shading from summer sun and allow winter sun to enter.

  • Windows and doors are located to get good natural cross ventilation and to ventilate bathrooms and wet areas.

  • Windows are located appropriately and glass selections made that provide natural daylight and winter sun penetration, while avoiding summer overheating.

  • Windows have been utilised to improve energy efficiency, by making use of the large range of high performance energy efficient glazing products available.

  • Maximum insulation has been provided in the roof, walls and floor.

  • There is appropriately designed thermal mass internally to moderate indoor air temperatures.

  • Draughts and air leakages have been adequately sealed.

  • The star rating of the home is more than the minimum 5 star required.



High performance aluminium frames are able to meet or exceed energy efficiency standards. They can easily achieve improvements in heat gain and heat loss through windows by 60% rivalling more expensive timber and uPVC equivalents.


  • Durability and low maintenance. The corrosion resistant qualities of aluminium provide a low maintenance frame and is resistant to weathering under a range of harsh environmental conditions. Unlike many other materials, it will not swell, crack, split or warp over time; ensuring an extended product life. Aluminium can be left in its finished condition. For additional protection or decorative finishes, aluminium can be anodised or painted.

  • Affordability. Aluminium frames can be significantly less expensive than other framing options, providing a strong yet economical window and door solution, while also achieving excellent energy outcomes.

  • Recyclability. Aluminium has one of the highest recycling rates of any metal and is an environmentally sustainable material. Recycling of aluminium requires only five percent of the initial energy consumed to create it. This inherent property differentiates it from other framing materials reinforcing its sustainable credentials.

  • Design Flexibility. The inherent strength and flexibility for aluminium to be manufactured to exacting specifications means it offers a vast range of possibilities from the economical to most elaborate systems while also delivering excellent thermal performance.