Sagging and cracked ceilings in 1930s Cheam houses
The original ceilings in Cheam's inter-war detached and semi-detached houses were plastered on lath or early board, and many now flex audibly when you walk on the floor above — the sign that the plaster has lost its key. Skimming over a ceiling like that is wasted money, because the movement cracks the new finish within months.
The lasting repair is to overboard: new plasterboard screwed through the old ceiling into the joists, joints taped, then skimmed. The old ceiling stays in place, the mess is minimal, and the finished ceiling is effectively new. In Cheam we do more of this than almost any other single job.
