Have been looking through some old threads for advice - we're installing insulation in our attic, rooms below are 4 bedrooms, the upstairs landing and 2 bathrooms (one with shower, one with bath).
We're using Rockwool Prorox SL 960 100mm in between the joists (up to the full height of the joists), and then the usual roll insulation on top of this. Total depth 300mm.
Do we need to have a plastic sheet / moisture barrier directly above the plasterboard i.e. between the top of the plasterboard and the bottom of the Rockwool, to guard against condensation issues e.g. as referred to in the 4th post of the link below.
//www.diynot.com/forums/viewtopic.php?t=251263
We're using Rockwool Prorox SL 960 100mm in between the joists (up to the full height of the joists), and then the usual roll insulation on top of this. Total depth 300mm.
Do we need to have a plastic sheet / moisture barrier directly above the plasterboard i.e. between the top of the plasterboard and the bottom of the Rockwool, to guard against condensation issues e.g. as referred to in the 4th post of the link below.
//www.diynot.com/forums/viewtopic.php?t=251263