Neil, you may be the exception to the rule!
i have unbelievably nothing on the go at the moment.
The heated workshop thing…very expensive to run and in this weather it would take a long time to get up to temp.
I have been mulling over possible improvements to my block/tin roof shed/workshop. Currently there is 50mm polystyrene jammed underneath the roof and this is very effective but condensation has water dripping in the place at the beginning and end of the year. Ventilation might be the answer, gapping between roof and poly, and letting air in via the corrugations (it’s not corrugated, it’s the square bumpy stuff you see on big warehouses etc).
The front wall is divided by a door and the left hand side has 50mm expanded poly behind the feather edge covering (50mm battens for the purpose), but the older right side is uninsulated so I may do that this summer. The wind generally blows AT the shed so it would be a benefit. On the left side the wall s covered by 50mm poly as I had two sheets spare,but can’t do much about the right side or rear as they face neighbours gardens.
Ashley