we want to put a model railway up in the loft,and i like the idea of having white plastic cladding throughout up there,my hubby is insulating the roof tomorrow,but he prefers plasterboard,at least the cladding will be maintenance free,
i think it might be able to pass code if you ever sell the house.i myself would use sheets of white wainscoting.also make sure the insulation if it has a paper backing ,paper faces the room.