woodsmith wrote on Feb 5th, 2014, 11:13pm:A vapour barrier is needed to stop moisture in the air (which is inside the building) travelling through or past the insulation and condensing on a cold surface within the wall/roof.
You can't fit laminate on top of insulation, you would need to fit a boarded floor over the insulation and then lay laminate over that.
Then am I better off (cost wise) to lift up the floor chicken wire the underside of the rafters fill with rockwool insulation and re lay the floor
the underside of the chicken wire being free flowing air - moisture would get there but water itself wouldnt - thus the insulation would never get soaked/wet.
Also, in roof do i vent airgap
and vent upper roof space (underside of ceiling) to avoid moisture build up on my plasterboard facing in?