We are looking for a quote to fix a damp problem on a house we wish to purchase. We’ve had a surveyor look at it and there are very high damp readings in several rooms. It’s been explained to us that the exterior walls are single masonry with pebble dash finish. It appears that internal timber ‘boxes’ have been built to sit off the walls in the rooms to deal with damp and attempt to insulate. We’d like to get someone in to let us know what it’s likely to cost to undertake remedial works to sort the identified damp issues out.