thanks for all replies.
as i thought, still needs something to stop the insulation.
ban-all-sheds - bedroom 1 (4 spots), ensuite 1 (2 spots), bedroom 2 (4 spots), ensuite 2 (2 spots), upstairs landing (6 spots), bedroom 3 (4 spots), main bathroom (4-6 spots), ensuite 3 (2-4 spots), other...