Shed Insulation question
 

Hi a bit off topic I know but there is a lot of info and experience in a lot of topics available . I have a typical sheet metal shed and want to cool it down and wonder what will be better.
1) Make a frame and use shade cloth (as used to shade plants )above metal roof . The idea is to cut down on the heat touching the metal roof and the being transferred into my space.
2) Insulate inside leaving airspace and install thermo reflective insulation and try to stop the heat transfer from the hot metal roof being transferred into my space.

Any experience or study done ??

Thanks getting ready for summer in Australia.

I use a shipping container for an extra garage...often park my 911 inside and I live in the Phoenix area with common 110 ambient degree's....it is under my pole barn steel roof and stays comfortable due to that.....the only way is to get it out of the direct sunlight unless you sprayed a foot of foam (properly) thru out the interior and that is still not as effective....most of the mobile homes in our area do the same...a roof overhead with a clear air space between.

Commonly called a safari roof or a tropical roof.

You could also lay light coloured shade cloth directly on as there wouldn't be much heat transfer from the plastic cloth to the roof. Would save you making a frame.


Another way is to put a sprinkler on the roof if the really hot days are infrequent or you're not worried about your water bill.

Don't know what the year around weather is like where you live. You might consider attaching foam panels with reflective aluminum surface from a building supply store on the top side of the roof. Reflective side up. You could remover them during cooler seasons. Also putting a turbine on the roof to evacuate warm air and draw in cooler air.