Insulating an old ceiling

[oldbilly]

Evening all. First time poster here.

I'm doing up my kitchen at the moment, and need to do something about the ceiling. At the moment it's sloping tongue and groove from the 1970s, with more recent blanket insulation above and then a newish slate roof. The old tongue and groove is in a bad shape. Since I also want to add some extra insulation, would it be okay to attach some Kingspan beneath the existing ceiling, and then add a second tongue and groove ceiling beneath that? I'm just worried there might be mould issues or something.

Thanks!

 

[oldbilly]

Guess I'll go ahead then

 

[catlad]

You can buy insulated plasterboard with a vapour barrier incorporated that would probably be the easiest way to insulate.

 

[oldbilly]

Thanks Catlad. The thing is, I want to tongue-and-groove the ceiling again, 'cos I like the look of it, so I thought kingspan boards would probably be easiest