Old houses don't take well to double glazing/fitted carpets/blocked up chimneys/modern plastic based paint and modern render/plaster - as there is nowhere for the air (and thus humidity) to go - very similar to the old riding in a waterproof mac idea :)
Keeping the temperature up keeps the walls warmer - therefore lessens the condensation that forms on them, other things to look at are the paint
^ this is good advice regarding damp.
Old houses don't take well to double glazing/fitted carpets/blocked up chimneys/modern plastic based paint and modern render/plaster - as there is nowhere for the air (and thus humidity) to go - very similar to the old riding in a waterproof mac idea :)
Keeping the temperature up keeps the walls warmer - therefore lessens the condensation that forms on them, other things to look at are the paint
Good info here about caring for old houses (ie pre 1930): http://www.periodproperty.co.uk/discussion_forum.htm