Thank you. Corten steel Leaf sculptures by Lump Studio, Melbourne. We love their work. www.lump.com.au

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The only skylight I would consider is from Velux as they have double glazed units with lots of shading and openable options. I would steer well clear of the old fashioned polycarbonate dome type as you have no control of the heat gain (or loss). Cost depend on size, slope of roof, type of roof construction, block-out screen and openable options. With the screen and openable options you also have the option of powering it through your homes electricity, in which case you will need a powerpoint installed in your roof space, or using integrated solar panels and battery. There are lots of Brisbane based companies that do supply and install for Velux skylights, so they should be able to quote. https://www.velux.com.au/ Bunnings also sell them if you check out their website, but you will need to arrange installation yourself, and in my experience it is better to go through a supply and install company for a better guarantee against potential roof leakage problems. Best of luck, Dr Retro of Dr Retro House Calls

A whirlybird might help but I remember the consumer magazine had an article about them years ago and they were more useful in some circumstances than others, it was not a matter on stick one on your roof and it fixes a variety of different issues.. As far as reducing heat goes, our neighbours lasted one summer with the whirlybird and then installed a cooling system. So I think a better understanding of the cause of the problem might lead to better solutions. What else is in your roof? Do you have insulation and/or sisalation? Do the bathroom exhaust fans ventilate into the roof space or are they ducted to the outside? Same question for kitchen rangehood?