Moving on from my Celotex in the garage conversion question, I am going to
be using Gyproc Thermaline Super (or Knauf equivalent), 50 or 55mm to
insulate the walls. That will do the insulation and plasterboard in one hit.
Would it be best to:
- put up the ceiling first, then do the walling, in that way, getting an
accurate fit between floor and ceiling?
- do the walling first, and then put up the ceiling?