@Mrs Beeman....if you havent got a water shortage (or can collect it for reuse) and shed has tin roof....put a cheap as chips garden sprinkler up in centre of roof and turn it on while working inside...the difference is huge...it works like the wet canvas water bottle,as water evaporates it takes the heat away.just cooling the tin itself makes huge difference,we did it on cowshed roof and used to have to push cows out from under the eaves back into heat.
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