I intend to dry-line the solid walls in a very cold room.
Should I put a polythene 'vapour control' membrane against the brick first. and then fix the battens over that, giving a 25mm or so 'cavity' before using the 50mm Kingspan.
Then the plasterboard fixed through the Kingspan to the battens with fairly long screws.
And should the plasterboard be foil-backed, or is it not necessary with the membrane?
Should I put a polythene 'vapour control' membrane against the brick first. and then fix the battens over that, giving a 25mm or so 'cavity' before using the 50mm Kingspan.
Then the plasterboard fixed through the Kingspan to the battens with fairly long screws.
And should the plasterboard be foil-backed, or is it not necessary with the membrane?