Checklist: Moisture Problems in Bedrooms

Bedrooms that are crowded with furniture, bedding, personal possessions can experience moisture problems.

Wall with damaged dry wall and floor with damaged wood

Typical Signs

  • Condensation on windows.
  • Rotting windowsills.
  • Mould around windowsills.
  • Damage or stained, peeling paint on gypsum wallboards or ceiling.
  • Peeling wallpaper.
  • Cracked or bulging ceiling.
  • Musty odours.
  • A damp, musty closet.
  • Mould in closets, surfaces of outside walls, behind furniture or hanging artwork, etc.
  • Water dripping from ceiling lights.
Closet overfilled with clothes

Possible Causes

  • Frequent use of room humidifier.
  • Excessive house humidity levels (moisture may be coming from another part of the house).
  • Lack of air circulation within room.
  • Older leaky windows.
  • Closed drapes and blinds preventing heat from reaching window.
  • Lack of air circulation in closet.
  • Inadequate gap at bottom of closet door.
  • Bedroom temperature much lower than in other rooms.
  • Bed and bedroom furniture too close to outside walls, preventing air movement, blocking warm air floor grille or baseboard heater.
  • Too many furnishings preventing proper air flow and heat circulation in room.
  • Old, musty carpet.
  • Inadequate insulation in outer walls or attic.
  • Plants, aquariums.
  • Bedroom door closed for too much of the day.
Woman opening curtains

Practical Solutions

  • Run humidifier only as necessary and for short periods of time.
  • Control humidity throughout the house.
  • Keep air registers, baseboard heaters unobstructed.
  • Leave bedroom door open to allow better circulation.
  • Windows may need upgrading to energy-efficient units.
  • Open drapes or blinds to encourage warm air circulation over window surfaces.
  • Do not store items in closet from floor to ceiling on outside walls.
  • Open closet door to allow air to circulate or install louvred doors.
  • Provide heat to bedroom.
  • Keep furniture 15 cm (6 in.) from outside walls, ducts and cold air return.
  • Properly insulate cold outer walls and ceiling.
  • Reduce furnishings that obstruct air circulation.



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