Checklist: Moisture Problems in the Kitchen

Cooking and cleaning activities in the kitchen can generate a great deal of moisture.

Wall with tiles that are broken and missing

Typical Signs

  • Condensation on windows, ceilings and/ or walls.
  • Damaged walls under windows.
  • Peeling paint loose or damaged flooring.
  • Moisture and mould under sinks or kitchen counters.
  • Rotting cabinetry under sinks.
  • Mould in cupboards and corners of interior surfaces of outside walls.
  • Musty odours.
Kettle with steam coming out of it

Possible Causes

  • Excessive moisture in home (there are moisture sources in other areas).
  • No kitchen exhaust fan/range hood over stove.
  • Recirculating-type kitchen range hood installed.
  • Prolonged or continuous simmering and boiling of foods and liquids.
  • Combustion moisture from gas ranges.
  • Leaks around sinks and fittings.
  • Plumbing leaks.
  • Garbage or wet items contributing to moisture.
  • Mould growing behind refrigerator condensate pan.
  • Items in cupboard against outside walls preventing air circulation.
  • Temperature too low or fluctuating.
  • Leaky dishwasher or dishwasher service pipes.
Gas range with exhaust fan above

Practical Solutions

  • Control overall house humidity.
  • Install and use a quiet kitchen exhaust fan vented to the outdoors.
  • Cover liquids and foods when simmering or boiling.
  • Use range hood while operating gas stove.
  • Caulk sink and fittings to counter.
  • Repair plumbing leaks and leaking appliances.
  • Occasionally clean condensate pan under refrigerator.
  • Keep items a few inches away from exterior walls.
  • Open cupboards occasionally to allow heat in.
  • Keep compost or garbage in covered containers under the sink.



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