On Mon, 4 Jul 2011 15:49:34 +0100, "john brook"
wrote:

We have a sheet steel garden shed, and with any sun at all it gets
unbearably hot inside.

We put up polystryene slabs under the roof, but that was to stop the
condensation dripping down inside in the winter. It does not help with the
problem of the shed getting too hot.

Can you build a little cupola in the roof and add an attic fan?

Jim