One of the most common places for mold spores to grow and spread, windowsills require preventative maintenance, especially this time of the year. Condensation, poor insulation or other airflow issues can form mold on both painted and stained window sills. Over time, mold can damage your window panes irreversibly and negatively affect your indoor air quality. Evidently, mold spores are easier to prevent than to remove, which is why it’s important to address the problem before it starts.


Why does mold form on window sills? As we know, moisture creates conducive conditions for mold to grow and develop. The potential sources of condensation buildup on windows include humidity of outside air, poor ventilation or plumbing leaks. In winter, moisture on the glass can build up due to a temperature difference or an insufficient airflow. If moisture sits on a sill for some time, green or black mold can appear. Accumulating over time, mold can damage the structure of wooden window frames. Furthermore, black mold, which is more hazardous than green mold, can only be removed by a professional mold remediation service.


Another major cause of mold growth besides humidity is inadequate airflow. Stagnant humid air can build up moisture on your window sills. To maintain proper airflow in your home, keep the thermostat at around 70 degrees and keep doors and windows closed while the AC is on. To eliminate excess humidity in bathrooms and kitchens, an exhaust fan would be a good investment. For basements and attics, consider obtaining a humidifier.


If you already detect mold on your window sills and need immediate removal, contact AirPro Environmental Solutions right away! Our certified professionals provide most towns in Massachusetts and Southern New Hampshire with outstanding mold remediation, air duct cleaning, and indoor air quality testing.