This really follows on from this old thread, but it is more suited to here now.
My fish room for Malawis
I have got stuck into the shed again.
The stud wall was secured to the support beam and was solid. Then I sealed up all the spaces with weather-sealing foam.
I ordered 75mm thick polystyrene foam panels with the silver foil insulation pre-glued onto the back. These are being trimmed to fit and glued in place with liquid nails.
I have some progress pictures.
Foam sheets ready to be installed.
The back of the stud wall, foam panels in place.
More photos to follow.