Infographic: Mould

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Organization: Health Canada

Published: 2017


What is mould?

Mould is the common name for any fungus that grows on food or damp materials

Things that can get mouldy:

  • Carpets
  • Books
  • Pillows/mattresses
  • Toys
  • Ceilings
  • Walls
  • Furniture
  • Bathrooms
  • Anything that can get wet

Who is most at risk?

  • Babies
  • Children
  • Seniors
  • People with asthma

Causes of mould

  • Floods
  • Leaking pipes, roof
  • Water infiltration
  • High humidity
  • Sewage backup

Health Effects of mould

  • Nose/throat/eye irritation
  • Tears
  • Sneezing
  • Difficulty breathing
  • Exacerbation of asthma

If you have any of these symptoms and suspect they are from mould, see a doctor or health professional.

Prevent mould

  • Keep humidity level low
  • Fix any leak or infiltration
  • Use bathroom and kitchen fan

What if there is mould in your home

  1. Fix causes (leak or infiltration), dry wet surfaces within 48 hours
  2. Clean all small patches (< 1m2) of mould on non-porous surfaces with soap and water. If the area is larger, you should hire a professional. Non-porous surfaces include glass, metals, leather and plastics and vinyl. Porous surfaces include drywall, cardboard, paper and untreated wood.
  3. Wear mask, goggles, and gloves when cleaning mould
  4. No need to use bleach
  5. Throw away what you can’t clean
  6. Replace building materials if they cannot be cleaned

For more information on addressing moisture and mould, please visit or contact us at:

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