Removing Mould from a Window

Preventing & Removing Mould from Your Windows

Spring has sprung and for many it means cleaning away winter's grime from our windows to enjoy the fresh brightness of the season. Windows can accumulate, dust, household toxins like smoke or cooking grease, and can even grow mould. Most people do not even realize they have mould growing on their windows. On most homes, mould begins to grow at the bottom of the windows at the joint between the glass and window frame. While window mould does not typically feed on windows themselves, it can destroy wood window frames.


While this can seem like a natural challenge in Canada, with its environmental temperature and moisture fluctuation, large amounts of mould can potentially be dangerous to you and your family’s health. Before you panic, here’s some information on how to identify the mould, get rid of it, and prevent it from happening in the future. 


When removing mould from your windows, understand that safety comes first, and always put on safety googles, gloves, and a dust mask so you don’t ingest the dangerous spores that the mould can release into the air as you ‘disturb’ it in the cleaning process. It is also very important that there is adequate ventilation in the room. Open a window or door so the mould spores can escape instead of staying locked in your home. Cover the floor under the window you’re cleaning.

Make a mixture of one part bleach to three parts warm water. Scrub the mould off of the windowsill using a non-abrasive brush and frequently dip the brush in the bleach mixture. Use a clean rag to then wipe away the mould you loosened. Allow the windowsill to dry completely before you close the window. Wipe off any remaining residue.

Leaking windows and condensation are the two leading causes for the buildup of mould on a windowsill. To prevent mould in your house, you need to reduce the amount of condensation on your windows. This can be done by: setting your air conditioning thermostat above 20 degrees Celsius, maintaining proper airflow in your home and regularly cleaning your home’s interior.

However, if your windows are no longer functioning properly, are broken, cracked, or simply no longer keeping moisture from your home, then perhaps the easiest way to prevent mould is by replacing your old windows. Your health and utility bills will thank you.

Window Replacement in Ottawa
Energy efficiency, elegant looks, and improved home comfort are all great reasons to consider high-quality replacement windows from Canadian Comfort Windows & Doors. For more information on any of our products or services, contact us in Ottawa at 613-727-9387 today for results that will look attractive and that carry our 10-year labour guarantee.