Age is not necessarily a guide to effective insulation. Look
how cool is one of the oldest buildings in town the
Barn, (left below) beside the Town Hall. Despite the fact
that the bee-keepers in session above had left the door open,
there's hardly any heat leaking from the room above.
Ancient wattle and daub (mud and manure mixed with hair)
keeps rooms warm and cosy; you can't get it in Gibbs and Dandy
though. On the right, the library at about the same time of
night, busy leaking heat from every window.