Our garage/workshop is part of the main house, so it has insulated cavity walls, the internal faces are painted blockwork.
The window is double glazed and there is 100mm Cellotex between the plasterboard and joists on the part not under a room.
We had a steel up and over door that fitted where it touched. This was replaced by an insulated roller shutter door, running in brush edged channels and with a draft seal top and bottom.
Yes, the insulation is only 15mm deep in the sections, so effectively only about 50% of the total area, but the absence of drafts and the insulation together make the garage warm and snug.
The benches are all re-cycled kitchen units.
The floor is painted.. I've considered boarding and carpeting, BUT access to the house is 200m down an un surfaced track. The amount of sand and grit I sweep up every month suggests that anything other than a hard surface would be unwise!
I'd like some insulation, but so far can't find any material that is thin and would take the weight of a car.....
