How to Clean Mold from Windows? | Causes, Risks and Solutions

Moulds are living organisms that can grow and reproduce wherever moisture is present. Oftentimes, moulds are quite difficult to spot early on, and since they are resistant to pressure and extreme temperatures, homeowners tend to overlook mould growth within their homes until it is too late. 

Windows are common areas for mould to spread quick and easy, especially if they are prone to condensation, that is why window cleaning is beneficial. However, mould around your house can cause allergies and other serious health issues for you and your family, and the best way to clean your window is by removing the mould immediately.

In this article, you will learn about the health risks mould can cause and the steps you can take to eliminate this problem once and for all. Read along to discover how you can prevent mould from forming around your window frames and live in a healthier home.

What Causes Mold on Windows to Grow?

Mould easily grows and spreads due to humid weather conditions since air can become moisture. An effective heating and cooling system can keep moisture levels inside a house under control, but any window cracks or air passages allow humidity and heat to enter – and that is how mould forms around window frames and glass panes.

Some windows are prone to condensation more than others and create the perfect environment for mould to grow and spread – therefore, it is important that you check the sill frames and corners of your windows to dry up any moisture.

Water leaks are also a cause for concern. If you have cracks on your window frames or leaks in your roof or pipe, mould can grow and quickly spread. Sealing these areas is the best way to prevent mould caused by water leaks.

The Risks Mold Can Present to Your Health

If you are unaware there is mould in your house, or if you take a long time to get rid of it, you definitely put yourself and your family at risk. Moulds are incredibly harmful to one’s health and can easily trigger the following symptoms:

  • Allergies
  • Shortness of breath
  • Headaches
  • Eye irritation
  • Skin rashes
  • Congestion
  • Depression and anxiety

People that are allergic to mould may sneeze, find it difficult to breathe and experience eye irritation. Mould can give dryness or an itchy sensation to someone’s eyes and rashes on the skin. 

In more grave situations, excessive mould can cause painful headaches and even depression or anxiety. Scientific evidence suggests that constant exposure to mould results in people suffering from overthinking, depersonalization and even panic attacks.

The best solution to avoid such mental and physical health problems is to get rid of the mould once and for all.

How to Remove Mold from Your Windows?

how to remove mold on windows

If you are wondering how to clean black mold on windows, you must ensure to clean and prepare the area by disposing of any objects and covering any furniture. You must also wear protective gear – long pants and shirts, goggles, masks, gloves and hair nets. You can tape around the frames of your windows to prevent any air from spreading the mould to other areas of your home

Here is a step-by-step guide to effectively remove mould from your window frames:

Step 1 – Spray the mould away

For effective cleaning, you must gather paper towels and prepare a solution of warm water with detergent and baking soda or a gallon of water with some bleach to disinfect the area. Get a spray bottle and use it to release steam on your window frames thoroughly.

Step 2 – Wipe the solution

After spraying the baking soda and detergent solution, gently wipe it with a paper towel or clean cloth, removing all the mould. You may often repeat this process of spraying and wiping mould a couple of times until it completely disappears.

Step 3 – Use the bleach solution

After wiping the mould away, gather your bleach and water solution and spray it on your window frames. But do not clean it immediately – leave the bleach to act in for a few minutes first.

The bleach solution will kill any remaining mould spores present in your window frames.

Step 4 – Dry everything and let the air in

With another clean cloth that you haven’t yet used, dry any hint of moisture from your window sill and frames or your walls. You can also use a hair dryer to speed up the process.

Lastly, open your now clean and mould-free windows to let fresh air inside. Doing so removes the lingering smell of mould and the scent that comes from the bleach.

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How to Avoid Mold from Growing on Your Windows Again?

If you wish never to have to see mould accumulating on your window frames again, it is vital that you control the moisture inside your house. Always ensure that your window sills and cases are dry, seal any cracks and clean any outside gutters.

You can also clean your home more often and keep it ventilated constantly by opening your windows, controlling the thermostat or installing a dehumidifier. All these measures will be very effective in avoiding moisture and, consequently, mould.

What if I Have Windows Made of Wood?

If you have wooden windows, it is best to have your windows sanded. In this process, just wipe down the sanded area to rid your window of any residue and apply oxalic acid on the affected spots, rubbing it away with cotton and a toothbrush. You may have to rinse and scrub the area with acid until the mould does not darken anymore.

Ensure that the affected spot – now clean – is completely dry before restaining the wood again.

Contact Shine Windows to Solve Any of Your Mold Urgencies

If your windows have mould and you don’t have the time to clean them properly, rest assured that the professional team can do the job for you! Contact Shine Windows to address any of your mold urgencies, including window cleaning in Toronto.

You don’t need to expose yourself to dangerous chemicals and moulds, and endanger your health even more. Simply call Shine Windows at (416) 949-3874, and we will effectively wipe away the mould from your windows today.


How do I get rid of black mould around windows?

To clean any mould from your windows, spray the area with baking soda and detergent and wipe it before spraying bleach.

Does vinegar remove mould from windows?

Vinegar is an excellent option if you wish to remove mould, as it has antibacterial properties.

What can I do if there’s mould in my window?

Use cleaning solutions and wiping cloths to wipe any mould from your windows gently.

Is vinegar better than bleach for cleaning mould?

A water and bleach solution is the most effective way to remove mould from window frames.

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