12/06/2026
๐๐ข๐ช ๐ ๐จ๐๐ ๐๐๐๐๐ง ๐๐ก๐ ๐๐๐ฅ ๐๐ข ๐ฌ๐ข๐จ ๐ก๐๐๐?
The National Construction Code (NCC) has always been very clear on this topic. The rules are based on the area of a room for necessary light and ventilation. It is a simple rule of thumb to provide 10% of the floor area of a room with natural light via glazing, with half of that amount open for ventilation.
Is that enough though?
We would suggest that a bit more is better, especially if there are shaded windows in our sub-tropical environment. Up to 20% seems to be a good figure. Bathrooms and toilets often survive with the legal minimum, but it can help to have more ventilation in comparison to natural light for obvious reasons.
Skylights can be an excellent way to increase light and ventilation in a building. On small lots where you may not want to see your neighbours, a window above you in the roof can be a great outcome. We suggest obtaining the double-glazed versions with internal curtains so you can control the sun sufficiently.
The more glazing there is on a house the more natural light you are receiving. Our health is directly related to this factor. A downside of increased glazing is the energy efficiency can be affected now that we are in the 7-star regime. A good solution to this can be to use e-glass or double-glazing.
Glass blocks are a great way to obtain extra light if ventilation is not an issue. These are excellent if inserted into fire separating walls that are near boundaries. They are also private.
This post was created by humans!
Peter Latemore and his team are local Building Designers, specializing in Queenslanders, including post-war, amongst all building types. Based in Grange, as Latemore Design, 3356 9051, [email protected], ABN 39 010 895 682. Servicing the inner regions within 12kms of Brisbane CBD. QBCC 1055247.
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