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Ventilation of your roof cavity

Our harsh Australian environment and often poor building design can result in our homes heating up very quickly during the day.

Heat trapped in the roof space can result in joint distortion, sagging ceilings and ultimately, paint problems. During winter months, moisture can become trapped within the roof cavity, resulting in the growth of mould and mildew.

While all of this happens in the background, the most important reason to ventilate is to cool your home.

As the heat builds-up in your roof, it radiates through the ceiling and into the rooms below. This heat becomes trapped in a band up to 500mm deep - if the ceilings in your home are 2.4m high, this heat band can be within one foot of your head height!

Ventilation of your roof cavity is the most effective way to combat all of these problems.

The answer? Skydome's PowerVent SMV300.

Equal to 8 wind-powered twirling vents: Hot day + no wind = NO PERFORMANCE

  1. SMV300 extracts hot air from the roof cavity
  2. Under Eave Vents are recommended to increase the performance of the system.
  3. Adjustable ceiling grilles allow hot air to be extracted from individual rooms.
  4. Optional thermostat automatically activates the unit as the roof space heats up.

For further product information or sales enquiry phone 13 14 24 (cost of local call) or  download our brochure for more information and technical specifications.


Electrical work should only be carried out by a licensed electrician. A qualified tradesperson is recommended to carry out the installation to your roof. When working at heights it is important to utilise all the appropriate safety equipment.