Insulating the studio

Because the old garage is built of concrete it needed some decent insulation, after all the winter is nearly here and I don't fancy having to work in fingerless gloves.  So the walls are being lined with polystyrene backed plasterboard which is quite thick and will provide a good level of insulation, the roof has an even thicker layer of polystyrene insulation, so with a little bit of heating it should be nice and warm.