Ceiling mould/mildew growth

Cause

Condensation forms on the ceiling because the roof space is not insulated - mould growth is the result of regular condensation occurring 

Repair

  • to remove mould/mildew, wash ceiling; treat with fungicide before repainting
  • insulate ceiling space
  • increase the ventilation. Add a rangehood over the kitchen stove and an exhaust vent near the shower in the bathroom, both vented to remove steam to outside the house. Installing a shower dome above the shower is another option. Opening windows for at least 10 minutes every day can reduce moisture in a house
  • avoid using unflued gas heaters, avoid drying clothes inside and make sure a clothes dryer is vented to expel moist air outside

Cause

Not enough fresh air ventilation to the space

Repair

  • to remove mould/mildew, wash ceiling; treat with fungicide before repainting
  • increase the ventilation. Add a rangehood over the kitchen stove and an exhaust vent near the shower in the bathroom, both vented to remove steam to outside the house. Installing a shower dome above the shower is another option. Opening windows for at least 10 minutes every day can reduce moisture in a house
  • avoid using unflued gas heaters, avoid drying clothes inside and make sure a clothes dryer is vented to expel moist air outside