Insulating Cold wall in bathroom

[markyuk]

Hello im trying to find out best way to insulate my bathroom wall

The wall gets so cold as its an outside solid brick wall not cavity
so it gets very cold and then causees a lot of mosture
so i have decided to rebuild the room and try to insulate it
what ihave decided is to make a studwall on to the existing wall and use gyproc 40mm thermaline plus i understand there should be an air gap between existing wall and the back of the foam on the board.

what do peole think would you use that board or moisture board and something like celotex for insulation
the thermaline board is quite cheap compaired,
also would i need a vapor barrier behind

many thanks

Mark

[TheDoctor4]

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