It was 37+ outside here yesterday and the internal temp was higher for sure - I need to get a thermometre in there. The storm that followed late in the day produced wind driven horizonal rain which woud probably have been diven through the louvre type vents. I can easily put in some floor vents as its on a raised deck but the top vents ( to use convection) is the problem. Whirlybirds ( in my experience) leak and allow debris inside. I am looking at the solar powered roof ventiators like this one:
http://www.ebay.com.au/itm/Solar-Wal...-/251835822588
The solar panel seems to be able to be relocatable and I can mount the fan unit on the vertical face of my skillion roof, which should extract heat from high up. I think it would be posible to fashion a 'storm cap' of some sort, like those used on boat cabin ventilators.
There are also many boat cabin ventilation solutions that might work very well for simple convection solutions, like this one:
https://www.whitworths.com.au/main_i...AbsolutePage=1