hi

i have an old house..80 odd years.. the plaster is pretty caput and
theres no cavity wall. what i want to do is insulate the outer walls as
im renovating it. i figured that if i could get some insulation, then
put plasterboard over it then id have new walls and an insulated house.

is this idea possible?

what insulation should i use?

how would i fix the plasterboard over the insulation? battens?

the old plaster is sound, but tired.and uneven.

thanks.