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How to Prevent Mold Growth on Window Sills

May 21st, 2021 | 2 min. read

How to Prevent Mold Growth on Window Sills

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Not all homeowners know that the leading causes of mold growth on windowsills are leaking windows and condensation. It can be hard to even tell mold is starting to grow on your windows, especially when you aren’t sure what to look for. 

Mold usually starts to grow on the bottom part of home windows, right between the glass and window sash frame. Although sometimes the mold is colored and noticeable, that’s not always the case. Depending on your window features or color you may or may not be able to notice mold growth—especially if the mold is the same color as your window frame. 

A small amount of mold isn’t harmful, but a large amount of mold accumulated along your windows can be problematic. Mold is dangerous to breathe in and could negatively impact you or your family’s health. Take a look at the following steps you can take to prevent mold growth in your home.


Clean Your Windows Regularly

Cleaning your entire house from top to bottom can be difficult. The kitchen and bathrooms typically get a lot of attention because of how frequently they’re used—but you can’t forget about your windows! Condensation can accumulate along your window sills after a storm or even a spill, making it easy for mold to grow in these areas. 


Install a Dehumidifier into Your Space

The key to mold prevention is eliminating water sources. Mold cannot grow where it is not wet or humid. That’s why dehumidifiers are excellent tools to prevent mold growth. Although dehumidifiers don’t kill mold, they reduce the likelihood of mold growth by reducing levels of humidity. It also helps to keep your thermostat at 70 degrees to reduce condensation within the home overall. 


Maintain Strong Air Circulation 

Keeping your doors and windows open throughout the day not only promotes better air quality in the home, but it also prevents condensation from forming along your windows. If the weather in your region doesn’t permit open windows, make sure your ceiling vents are open at all times. This allows you to maintain proper airflow throughout your space.


What Caused Mold Growth on Windows? 

Mold growth on windows is typically caused by excess moisture and poor ventilation. When warm, humid air comes into contact with a cooler surface, such as a window pane, it can cause condensation to form. If the moisture is not properly ventilated, it can create an environment conducive to mold growth.

Other factors that can contribute to mold growth on windows include leaks or water damage around the window frames, high humidity levels in the home, and inadequate insulation.


Call Southwest Exteriors Today to Learn More About Our Expert Window Replacement Services

If you follow the advice above and are still unable to prevent mold growth on your window sills, it may be time to replace your home’s windows. Luckily, Southwest Exteriors is the window company you can count on for smooth and seamless window replacements. 

Our window installations come in a variety of styles, colors, and finishes. Choose the design that complements your home’s current aesthetic. Call us today and ask to speak to one of our friendly representatives about your options. You can also submit a quick form online to grab your free, no-obligation project estimate!