Nothing spoils a view like a dirty window. This is especially true when the source of your dirty window is thanks to black mold. Fortunately, there are things you can do to remove this unsightly bacteria, and prevent it from returning in the future. Are you dealing with mold on windows? Learn more about the causes and how to get rid of it for good.



Finding black mold around your windows can be concerning. Not only is it unsightly, it’s also detrimental to your health and your home. If you spot black mold around your windows it could be an indication of excess moisture. If you see water droplets on the glass this will confirm it.

Black mold spores are especially troublesome for people with breathing problems such as asthma. It can also cause eye irritation, rashes, wheezing, and coughing. If you come across black mold in your home you should try to improve the ventilation in your home. This should help as it will cut down on some of the excess moisture.


Black mold shows up because of high moisture levels. This can be due to humidity, water damage, condensation, and, believe it or not, plant pots and flowers. It is a form of fungus that shows up when moisture levels are right and there is a food source for it to eat. Black mold feasts on dirt as the organic materials provide a great source of nutrients. Thus, dirty windows are more likely to harbor black mold than clean ones.

If you neglect cleaning your windows and have high levels of moisture, you can almost guarantee black mold. On top of keeping your windows clean and your moisture levels in check – investing in heavy window shades can help the situation. It would cut down on the temperature swings that occur when the sun beats down on the glass all day.


Black mold is likely to appear on your window frames and window sills. It can be difficult to remove, and this is especially true if you allow it to grow and build up over time. It’s dark in colour and can range from black, to dark green and dark brown. They are often circular shaped spots that can have a furry look to them.

Some black mold can develop shades of orange or have white speckles. Black mold spores can multiply and spread extremely quickly. Another sign of black mold on windows is discolouration between the window sash and rail and at the corners of the frame.



If the mold isn’t too bad, you can clean it yourself with a homemade solution of bleach and water. If you attempt to do it yourself, make sure to use rubber gloves, a respiratory mask, and even goggles.

If the black mold problem is significant, you should call a professional mold removal company to tackle the issue.

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Fortunately here at Blackout projects, we are experts when it comes to removing black mold on windows. So the next time you spot black mold on your windows, give us a call and we’ll be on our way to help!