Repairs and problems
Condensation dripping from a toilet cistern
Where jobs go wrong
Better ventilation and, in some cases, an insulated or concealed cistern arrangement reduce it.
The short answer
Cold incoming water chills the ceramic, warm humid air condenses on it, and the resulting drips look exactly like a leak.
How this is diagnosed
The tell is that the drips appear in humid conditions and stop in dry weather, regardless of flushing.
Better ventilation and, in some cases, an insulated or concealed cistern arrangement reduce it.
Questions we get asked
Is it harmful?
Persistent drips onto a timber floor cause damage over time, so it is worth resolving.
Can insulation be added?
Some cisterns can be lined, though improving room ventilation is usually the more effective step.
Connected pages on this site
Working out what is realistic in your space?
Room dimensions, the position of the window and where the waste leaves the building decide most of it. Send those and we can be specific.