Trying to buy our first house, in Bristol. The one we like has had extensive rebuilding work done, including replastering. It is an end terrace house and the wall exposed to the elements has an issue with salt coming through to the interior on the ground floor (in multiple rooms). The vendor says there was no damp previousl y and it is a common issue with replastering, which he will "sort out" before it is sold. Am I right to be wary, or worried about nothing?