Evening.  I'm plasterboarding my gaff but I have this thing I need a bit of advice on. The main steel beam is supported on one side with an upright tubular steel beam which is within the inner block work. It's got wool behind it in the cavity, if the builder built it to my architects drawing. The other side rests on a pier. Anyways I want to plasterboard over this wall but do I need to do anything additional to the beam? I suppose warm air will travel through the plaster and hit the st