Toilet Wobbles or Leaks at the Base? It's the Flange
That small puddle at the base of the toilet isn't from a splashy user — it's the flange seal letting go. Ignored, it rots the subfloor.
What the Flange Does
The flange is the plastic or brass ring that connects the toilet outlet to the sewer waste pipe in the floor. A wax or rubber gasket seals it.
Common Failure Modes
Cracked plastic flange (common on 1990s Brisbane homes), degraded wax seal, or loose floor bolts letting the toilet rock.
Repair Cost
$280–$450 to lift, re-seat and re-seal a standard floor-mount toilet. Add $150 if the flange itself needs replacement.
Signs You've Waited Too Long
Soft or discoloured floorboards, sewer smell that won't clear, or visible mould at the toilet base = subfloor damage likely.
Frequently Asked Questions
Can I just re-caulk around the base?
No — that traps the leak inside and accelerates floor rot. The toilet must be lifted and the seal replaced properly.