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Exterior Window Mold: Causes, Prevention, and Removal

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Exterior window mold is unsightly, compromising your windows’ aesthetics. Molds can also put your family’s health at risk. To keep a mold-free and healthy home, you must learn the causes, prevention methods and effective exterior window cleaning tips.

Causes of Window Mold

A lot of factors contribute to mold growth on exterior windows. These include:

  1. Moisture: Excess moisture can accumulate on windows due to condensation, rain, humidity, and poor ventilation.
  2. Dirt and Debris: Dirt, dust, pollen, and other organic debris that settle on windows can promote mold formation.
  3. Lack of Sunlight: Mold prefers damp and dark areas. Windows that receive limited sunlight are more susceptible to mold growth as they remain moist for longer periods.
  4. Poor Window Installation: Improperly installed windows can create cracks and gaps where moisture can enter. This encourages mold development.
  5. High Humidity: Regions with high humidity levels experience more frequent mold growth due to the constant presence of moisture in the air.

Tips to Prevent Exterior Window Mold

Prevention is always your best weapon in combating mold growth. Here are some five preventive measures you can follow:

  1. Control Moisture

To keep moisture under control in your home and prevent molds on windows from condensation, start by ensuring proper ventilation.

Use exhaust fans to clear out moisture from showering in the bathroom and cooking in the kitchen. Be sure to fix leakages right away to avoid water damage and moisture buildup. A quick wipe-down of your windows also helps to remove condensation and keep things dry.

  • Keep Windows Clean

Mix mild detergent and water to wipe your windows clean. Don’t forget to pay attention to the corners, sills, and tracks where dirt likes to gather. For an even deeper clean, consider getting pressure washing services. Experts know the effective and efficient methods of removing stubborn grime and buildup so your windows stay streak-free and sparkling.

  • Increase Sunlight Exposure

Letting more sunlight in can make a big difference, too. Trimming trees and shrubs around your windows allows more light to brighten your space. Choosing window treatments that let the sunlight through can help keep your home feeling airy and open.

  • Inspect and Maintain Windows

It’s also a good idea to regularly look for signs that may encourage exterior window molds. Check for any damage, cracks, or gaps that could let moisture in. Sealing these gaps is an easy way to keep water out (use mold-resistant caulk). Make sure there’s proper drainage around your windows so that water doesn’t pool up and seep into the frames.

  • Use Mold-Resistant Products

Consider using mold-resistant products when working on your windows. Mold-resistant paints and sealants are a smart choice. Window screens treated with antimicrobial agents can help prevent mold from growing.

An exterior window that has a lot of mold growing on it. The window is painted white.
Photo by Fleur on Unsplash

Ways of Removing Exterior Window Mold

It’s important to properly clean window molds if you notice some growth. This is to prevent further damage and health risks. You can follow these:

For Mild Mold Infestation

When dealing with a mild mold infestation, all you might need is a simple cleaning solution of 1 tbsp. dish soap mixed with 1 gallon of water (preferably warm). Scrub the affected areas gently using a soft brush or sponge dipped in the solution. Once you’re done, rinse the area thoroughly with clean water and make sure to dry it completely to prevent any moisture from lingering.

For Moderate Mold Infestation

Here, you might need something a bit stronger. Combine cleaning vinegar with one gallon of water. Wipe the mixture on to the moldy surfaces and let it sit for 10-15 minutes to work its magic. Afterward, scrub the area with a brush, rinse thoroughly with clean water, and wipe dry. Alternatively, you can use Superstratum Building Cleaner undiluted.

For Severe Mold Infestation

If mold keeps coming back, it’s best to call in the professionals. Mold removal experts have the right tools and know-how to safely and effectively eliminate mold, figure out what’s causing it, and help prevent it from coming back in the future. Just because mold is on exterior windows doesn’t mean it won’t work it’s way inside your home.

Health Risks Associated with Exterior Window Mold

Frequent exposure to mold spores can cause health problems, particularly in individuals with allergies, respiratory issues, or weakened immune systems. Some of the common health risks include:

  1. Respiratory Problems: Mold spores can cause coughing, wheezing, and difficulty breathing. They can even lead to asthma and other respiratory conditions.
  2. Allergic Reactions: Sneezing, runny nose, itchy eyes, skin rashes, and other allergic reactions can be caused by mold exposure.
  3. Infections: Individuals with compromised immune systems can develop infections from certain types of mold.
  4. Toxic Effects: Mycotoxins (naturally occurring toxins) from certain mold species can cause neurological issues and organ damage.

Are Black Molds Around Windows Dangerous?

Yes, black mold around windows can be dangerous. It is known to produce mycotoxins, which can pose serious health risks if inhaled or touched.

Important Note: Even if the mold isn’t black, it can still be dangerous, particularly for people with allergies or respiratory issues.

Conclusion

Exterior window mold is a common problem that can affect your home’s aesthetics, your health, and overall well-being. By understanding the causes, implementing preventive measures, and using the best ways to clean moldy windows laid out in this article, you can maintain a mold-free and healthy home. Remember, prevention is always better than cure, so prioritize regular maintenance to keep your stubborn enemies at bay.

Be sure to check out my article on Interior Window Mold for more tips and tricks!

An exterior window that has a lot of mold growing on it. The window is painted white.

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