Stripping out No 9 threw up a few more problems than at either No 109 or No 93. We knew something grim lay beneath, after spotting that most of the house had a layer of wallpapered plasterboard on top of every wall. But it was only after we completed that we could rip off the offending plasterboard and see the full horror. It seems that to solve some damp problems, the previous owners had put up new pebbledash, but didn’t want to knock the inside of the house back to brick and replaster it. So instead, the plasterboard was put up, complete with a layer of foil on the underside. Unfortunately, this served to trap the moisture into the walls, resulting in a layer of mould and black spores. Cue steamers, chisels and bleach. Glad we had masks on during this process!