A nice Q&A at Enterprise Nation with shedworker Lauren Crawford. She is a hand woven textile designer who runs her business from a Scandinavian-style log cabin: inside she operates a large weaver loom and from this garden office has already sold a collection to US department store Macys. She says the walls are 45mm thick and both the floor and roof are insulated. The external dimensions are 4.5m by 3.5m, with doubleglazed doors and windows. Well worth a browse.