Hi guys,
I'm just seeking some advise of how to best insulate the room shown in the attached image on a relatively low budget.
I'm looking to get a 5ft tubular heater on the right hand wall to warm the room and as you can see, the room is more like a walk in (and duck) cupboard so this should be sufficient enough to heat the air. Can anybody recommend any material I can put on the wall and ceiling to hold the heat in?