Hi, Bit of a DIY newbie. Been trying to improve house insulation to keep heat in. I have a converted attic lined by plasterboard. The wall has plasterboard with 50mm of rockwool insulation behind it between the studs (no moisture barrier from what iv seen). I've filled any gaps iv seen with new rockwool insulation. My question: Can i seal in this insulation with some kind of reflective foil insulation behind it attached to the studs e.g https://www.screwfix.com/p/ybs-airtec-reflective-double-insulation-1-2-x-25m/6520p or will this likely be risky as it could lead to moisture behind the plasterboard?