I am renovating a 150 year old stone cottage and have now reached the point when I need to think about insulating the walls. The walls are 500mm thick and have stone outer leaf and stone or brick inner leaf with lime mortar. They seem to be filled with rubble and some clay i.e. there is no cavity. Also the stone on the outside will be exposed, so insulation on the outside is not an option.
The rooms are quite small inside, so I want to minimise the amount of space taken up by dry lining. Obviously I don't want a cold house or condensation/dampness issues in the future.
If anyone has experience in this area could they please point me in the right direction?