I have a villa near Lapis and, luckily, have never had any damp issues (in 8 years), although it’s shut up a lot and not used very much. When I leave in the autumn I put those cheap (£1ish) dehumidifying pots in each room. They are usually full of water in May but last year I left in June and didn’t come back/put any out. Luckily there were still no problems, despite the foul winter, so I’m not sure whether to bother again, but they may help others’? I do have the place regularly checked by a property manager though. Someone told me ‘all properties are damp on the ground floor’, but this is blatantly untrue and depends on the build quality.